relation.js
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export function ChildrenMixin(parent, options = {}) {
const indexKey = options.indexKey || 'index';
return {
inject: {
[parent]: {
default: null,
},
},
mounted() {
this.parent = this[parent];
this.bindRelation();
},
// #ifdef VUE2
beforeDestroy() {
if (this.parent) {
this.parent.children = this.parent.children.filter(
(item) => item !== this
);
uni.$emit("childrenReady" + this.parent._uid, this);
}
},
// #endif
// #ifdef VUE3
beforeUnmount() {
if (this.parent) {
this.parent.children = this.parent.children.filter(
(item) => item !== this
);
uni.$emit("childrenReady" + this.parent._uid, this);
}
},
// #endif
methods: {
bindRelation() {
if (!this.parent || this.parent.children.indexOf(this) !== -1) {
return;
}
const children = [...this.parent.children, this];
this.parent.children = children;
this.index = this.parent.children.indexOf(this);
uni.$emit("childrenReady" + this.parent._uid, this);
},
},
};
}
export function ParentMixin(parent) {
return {
provide() {
return {
[parent]: this,
};
},
created() {
this.children = [];
},
// #ifdef VUE2
beforeDestroy() {
uni.$off("childrenReady" + this._uid)
},
// #endif
// #ifdef VUE3
beforeUnmount() {
uni.$off("childrenReady" + this._uid)
},
// #endif
};
}