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[improvement] Tabbar: optimize performance (#1362)

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neverland 2019-03-01 14:56:07 +08:00 committed by GitHub
parent 01da68bcf9
commit dee02a09a8
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 6 additions and 7 deletions
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13
packages/tabbar/index.ts
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@ -35,26 +35,25 @@ VantComponent({
}, },
data: { data: {
items: [], items: []
currentActive: -1
}, },
watch: { watch: {
active(active) { active(active) {
this.set({ currentActive: active }); this.currentActive = active;
this.setActiveItem(); this.setActiveItem();
} }
}, },
created() { created() {
this.set({ currentActive: this.data.active }); this.currentActive = this.data.active;
}, },
methods: { methods: {
setActiveItem() { setActiveItem() {
this.data.items.forEach((item, index) => { this.data.items.forEach((item, index) => {
item.setActive({ item.setActive({
active: index === this.data.currentActive, active: index === this.currentActive,
color: this.data.activeColor color: this.data.activeColor
}); });
}); });
@ -62,9 +61,9 @@ VantComponent({
onChange(child) { onChange(child) {
const active = this.data.items.indexOf(child); const active = this.data.items.indexOf(child);
if (active !== this.data.currentActive && active !== -1) { if (active !== this.currentActive && active !== -1) {
this.$emit('change', active); this.$emit('change', active);
this.set({ currentActive: active }); this.currentActive = active;
this.setActiveItem(); this.setActiveItem();
} }
} }