blackteay/vant
1
0
Fork 0
mirror of https://gitee.com/vant-contrib/vant.git synced 2025-05-25 15:59:16 +08:00
Code Issues Projects Releases Wiki Activity

chore(ImagePreview): optimize event binding

Browse Source
This commit is contained in:
陈嘉涵 2019-12-31 14:16:12 +08:00 committed by neverland
parent b66597621c
commit 5fff24cee8
1 changed files with 20 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
src/image-preview/ImagePreview.js
View File

@ -99,7 +99,10 @@ export default createComponent({
watch: {
value(val) {
if (val) {
this.onShow();
this.setActive(this.startPosition);
this.$nextTick(() => {
this.$refs.swipe.swipeTo(this.startPosition, { immediate: true });
});
} else {
this.$emit('close', {
index: this.active,
@ -108,39 +111,27 @@ export default createComponent({
}
},
startPosition(active) {
this.setActive(active);
}
},
startPosition(val) {
this.setActive(val);
},
mounted() {
if (this.value) {
this.bindEvent();
shouldRender: {
handler(val) {
if (val) {
this.$nextTick(() => {
const swipe = this.$refs.swipe.$el;
on(swipe, 'touchstart', this.onWrapperTouchStart);
on(swipe, 'touchmove', preventDefault);
on(swipe, 'touchend', this.onWrapperTouchEnd);
on(swipe, 'touchcancel', this.onWrapperTouchEnd);
});
}
},
immediate: true
}
},
methods: {
onShow() {
this.bindEvent();
this.setActive(this.startPosition);
this.$nextTick(() => {
this.$refs.swipe.swipeTo(this.startPosition, { immediate: true });
});
},
bindEvent() {
if (!this.eventBinded) {
this.eventBinded = true;
this.$nextTick(() => {
const swipe = this.$refs.swipe.$el;
on(swipe, 'touchstart', this.onWrapperTouchStart);
on(swipe, 'touchmove', preventDefault);
on(swipe, 'touchend', this.onWrapperTouchEnd);
on(swipe, 'touchcancel', this.onWrapperTouchEnd);
});
}
},
onWrapperTouchStart() {
this.touchStartTime = new Date();
},