1)事件是视图层到逻辑层的通讯方式。
2)事件可以将用户的行为反馈到逻辑层进行处理。
3)事件可以绑定在组件上,当达到触发条件,就会执行逻辑层中对应的事件函数。
4)事件对象可以携带额外信息,如 id、dataset、touches。
若要在组件中绑定一个事件处理函数,如 onTap
,则需要在该页面的 .js 文件中的 Page
里定义onTap
对应的事件处理函数。
1 2 3 4 5 | <span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "cm-tag cm-bracket" style= "color: rgb(34, 134, 58); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><</span><span class = "cm-tag" style= "color: rgb(34, 134, 58); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >view</span> <span class = "cm-attribute" style= "color: rgb(111, 66, 193); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >id</span>=<span class = "cm-string" style= "color: rgb(102, 153, 0); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "tapTest" </span> <span class = "cm-attribute" style= "color: rgb(111, 66, 193); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >data-hi</span>=<span class = "cm-string" style= "color: rgb(102, 153, 0); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "Alipay" </span> <span class = "cm-attribute" style= "color: rgb(111, 66, 193); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >onTap</span>=<span class = "cm-string" style= "color: rgb(102, 153, 0); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "tapName" </span><span class = "cm-tag cm-bracket" style= "color: rgb(34, 134, 58); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >></span> </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > <span class = "cm-tag cm-bracket" style= "color: rgb(34, 134, 58); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><</span><span class = "cm-tag" style= "color: rgb(34, 134, 58); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >view</span> <span class = "cm-attribute" style= "color: rgb(111, 66, 193); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >id</span>=<span class = "cm-string" style= "color: rgb(102, 153, 0); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "tapTestInner" </span> <span class = "cm-attribute" style= "color: rgb(111, 66, 193); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >data-hi</span>=<span class = "cm-string" style= "color: rgb(102, 153, 0); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "AlipayInner" </span><span class = "cm-tag cm-bracket" style= "color: rgb(34, 134, 58); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >></span> </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > Click me! </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > <span class = "cm-tag cm-bracket" style= "color: rgb(34, 134, 58); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></</span><span class = "cm-tag" style= "color: rgb(34, 134, 58); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >view</span><span class = "cm-tag cm-bracket" style= "color: rgb(34, 134, 58); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >></span> </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "cm-tag cm-bracket" style= "color: rgb(34, 134, 58); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></</span><span class = "cm-tag" style= "color: rgb(34, 134, 58); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >view</span><span class = "cm-tag cm-bracket" style= "color: rgb(34, 134, 58); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >></span></span></span> |
在相应的 Page
中定义相应的事件处理函数 tapName
,参数为事件对象 event。
1 2 3 4 5 | <span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >Page({ </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > tapName(event) { </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > console.log(event); </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > }, </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >});</span></span> |
控制台输出 event 信息如下所示:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | <span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-1" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >{ </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-1" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "type" : "tap" , </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-1" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "timeStamp" : 1550561469952 , </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-1" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "target" : { </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-1" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "id" : "tapTestInner" , </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-1" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "dataset" : { </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-1" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "hi" : "Alipay" </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-1" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > }, </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-1" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "targetDataset" : { </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "hi" : "AlipayInner" </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > } </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > }, </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "currentTarget" : { </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "id" : "tapTest" , </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "dataset" : { </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > "hi" : "Alipay" </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > } </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > } </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" >}</span></span> |
使用组件(基础组件、扩展组件和自定义组件)时,组件里有哪些可用的事件取决于组件本身是否支持,支持的事件会在具体组件的文档里明确列出。
事件分为冒泡事件和非冒泡事件:
1)冒泡事件:以关键字 on
为前缀,当组件上的事件被触发,该事件会向父节点传递。
2)非冒泡事件:以关键字 catch
为前缀,当组件上的事件被触发,该事件不会向父节点传递。
事件绑定的写法同组件的属性,以 key、value 的形式。
1)key 以 on
或 catch
开头,然后跟上事件的类型,如 onTap
、catchTap
。
2)value 是一个字符串,对应 Page 中定义的函数名,不存在时触发事件会报错。
1 2 3 4 5 6 7 8 9 | <span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><view id= "outter" onTap= "handleTap1" > </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > view1 </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > <view id= "middle" catchTap= "handleTap2" > </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > view2 </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > <view id= "inner" onTap= "handleTap3" > </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > view3 </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > </view> </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" > </view> </span></span><span class = "lake-preview-line" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ><span class = "lake-preview-line-number lake-lm-pad-level-0" style= "color: rgb(191, 191, 191); margin: 0px 8px 0px 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></span><span class = "lake-preview-codeblock-content" style= "color: rgb(89, 89, 89); margin: 0px; padding: 0px; background: none 0% 0% / auto repeat scroll padding-box border-box rgba(0, 0, 0, 0);" ></view></span></span> |
上面代码中,点击 view3 会先后触发 handleTap3 和 handleTap2(因为 tap 事件会冒泡到 view2,而 view2 阻止了 tap 事件冒泡,不再向父节点传递),点击 view2 会触发 handleTap2,点击 view1 会触发 handleTap1。
所有会发生冒泡的事件:
类型 | 触发条件 |
touchStart | 触摸动作开始 |
touchMove | 触摸后移动 |
touchEnd | 触摸动作结束 |
touchCancel | 触摸动作被打断,如来电提醒,弹窗 |
tap | 触摸后马上离开 |
longTap | 触摸后,超过500ms再离开 |