Transition Styles

NOTE

Supported since API version 4. Updates will be marked with a superscript to indicate their earliest API version.

Transition of Shared Elements

Attributes

Styles

Important Notes

1. If the shared element transition style and custom page transition style are both configured, the latter is used.

2. The exchange effect of shared elements is similar to the transition shown below.

Figure 1 Default transition effect of shared elements

1. The animation of a shared element does not take effect for the border and background color of the element.

2. During the transition of a shared element, the page element is hidden. Therefore, the animation style and function set for the page element are invalid.

3. During the dynamic change of shareid⁵⁺, if the shareid value in component A is overwritten by that in component B, the shared element effect of component A becomes ineffective and will not be restored even if the shareid value is changed in component B.

Example

In the example below, where PageA jumps to PageB, the shared element is image, and the shareid is “shareImage”.

<!-- PageA -->
<!-- xxx.hml -->
<div>
  <list>
    <list-item type="description">
      <image src="item.jpg" shareid="shareImage" onclick="jump" class="shared-transition-style"></image>
    </list-item>
    <list-item>
      <text onclick="jump">Click on picture to jump to the details</text>
    </list-item>
  </list>
</div>

// xxx.js
import router from '@ohos.router';
export default {
  jump() {
    router.push({
      // The path must be the same as that in the config.json file.
      url: 'pages/detailpage',
    });
  },
}

/* xxx.css */
.shared-transition-style {
  shared-transition-effect: exchange;
  shared-transition-name: shared-transition;
}
@keyframes shared-transition {
  from { opacity: 0; }
  to { opacity: 1; }
}

<!-- PageB -->
<!-- xxx.hml -->
<div>
  <image src="itemDetail.jpg" shareid="shareImage" onclick="jumpBack" class="shared-transition-style"></image>
</div>

// xxx.js
import router from '@ohos.router';
export default {
  jumpBack() {
    router.back();
  },
}

/* xxx.css */
.shared-transition-style {
  shared-transition-effect: exchange;
  shared-transition-name: shared-transition;
}
@keyframes shared-transition {
  from { opacity: 0; }
  to { opacity: 1; }
}

Widget Transition

NOTE Widget transitions are not available when other transitions (including shared element transitions and custom transitions) are used.

Styles

Example

The source_page has a title area on the top and a widget list. Users can tap a widget to switch to the target_page.

<!-- source_page -->
<!-- xxx.hml -->
<div class="container">
  <div class="outer">
    <text style="font-size: 23px; margin-bottom: 20px" >MAIN TITLE</text>
  </div>
  <list style="width:340px;height:600px;flex-direction:column;justify-content:center;align-items:center">
    <list-item type="listItem" class="item" card="true" for="list" id="{{$item.id}}" onclick="jumpPage({{$item.id}}, {{$item.url}})">
      <text style="margin-left: 10px; font-size: 23px;">{{$item.title}}</text>
    </list-item>
  </list>
</div>

// xxx.js
import router from '@ohos.router'
export default {
  data: { list: [] },
  onInit() {
    for(var i = 0; i < 10; i++) {
      var item = { url: "pages/card_transition/target_page/index", 
                   title: "this is title" + i, id: "item_" + i }
      this.list.push(item);
    }
  },
  jumpPage(id, url) {
    var cardId = this.$element(id).ref;
    router.push({ url: url, params : { ref : cardId } });
  }
}

/* xxx.css */
.container {
  width: 100%;
  height: 100%;
  flex-direction: column;
  align-items: center;
  background-color: #ABDAFF;
}
.item {
  height: 80px;
  background-color: #FAFAFA;
  margin-top: 2px;
}
.outer {
  width: 300px;
  height: 100px;
  align-items: flex-end;
  transition-effect: unfold;
}

<!-- target_page -->
<!-- xxx.hml -->
<div class="container">
  <div class="div">
    <text style="font-size: 30px">this is detail</text>
  </div>
</div>

/* xxx.css */
.container {
  width: 100%;
  height: 100%; 
  flex-direction: column;
  align-items: center;
  background-color: #EBFFD7;
}
.div {
  height: 600px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

Page Transition

Styles

Important Notes

1. When defining a custom transition, set the page background color to an opaque color. Otherwise, the transition effect can be harsh.

2. The transition-enter and transition-exit styles can be configured separately. The default settings are used if they are not configured.

3. Notes on the transition-enter and transition-exit styles:

a. In the push scenario, the animation defined by transition-enter is used for entering the Page2.js in the page stack; the animation defined by transition-exit is used for entering the Page1.js in the page stack.

b. In the back scenario, the animation defined by transition-enter is used for exiting the Page2.js in the page stack, with the animation played in reverse sequence; the animation defined by transition-exit is used for exiting the Page1.js in the page stack, with the animation played in reverse sequence.

Example

Page1 has an opaque box. When you tap the box, Page2 is displayed. When you tap the box on Page2, Page1 is displayed.

1. Page1

   <!-- xxx.hml -->
   <div class="container">
       <text>index</text>
       <div class="move_page" onclick="jump"></div>
   </div>

   // xxx.js
   import router from '@ohos.router';
   export default {
       data: {
   
       },
       jump() {
           router.push({
               url:'pages/transition2/transition2'
           })
       }
   }

   /* xxx.css */
   .container {
       flex-direction: column;
       justify-content: center;
       align-items: center;
       width: 100%;
       height: 100%;
   }
   .move_page {
       width: 100px;
       height: 100px;
       background-color: #72d3fa;
       transition-enter: go_page;
       transition-exit: exit_page;
       transition-duration: 5s;
       transition-timing-function: friction;
   }
   
   @keyframes go_page {
       from {
           opacity: 0;
           transform: translate(0px) rotate(60deg) scale(1.0);
       }
   
       to {
           opacity: 1;
           transform: translate(100px) rotate(360deg) scale(1.0);
       }
   }
   @keyframes exit_page {
       from {
           opacity: 1;
           transform: translate(200px) rotate(60deg) scale(2);
       }
   
       to {
           opacity: 0;
           transform: translate(200px) rotate(360deg) scale(2);
       }
   }

1. Page2

   <!-- xxx.hml -->
   <div class="container">
       <text>transition</text>
       <div class="move_page" onclick="jumpBack"></div>
   </div>

   // xxx.js
   import router from '@ohos.router';
   export default {
       data: {
   
       },
       jumpBack() {
           router.back()
       }
   }

   /* xxx.css */
   .container {
       flex-direction: column;
       justify-content: center;
       align-items: center;
       width: 100%;
       height: 100%;
   }
   
   .move_page {
       width: 100px;
       height: 100px;
       background-color: #f172fa;
       transition-enter: go_page;
       transition-exit: exit_page;
       transition-duration: 5s;
       transition-timing-function: ease;
   }
   
   @keyframes go_page {
       from {
           opacity: 0;
           transform:translate(100px) rotate(0deg) scale(1.0);
       }
       to {
           opacity: 1;
           transform:translate(100px) rotate(180deg) scale(2.0);
       }
   }
   
   @keyframes exit_page {
       from {
           opacity: 1;
           transform: translate(0px) rotate(60deg) scale(1);
       }
       to {
           opacity: 0;
           transform: translate(0px) rotate(360deg) scale(1);
       }
   }

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