let isLogin = false;
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// 发布订阅模式
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class Publisher {
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constructor() {
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this.map = new Map();
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}
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on(key, callback) {
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let arr = this.map.get(key) || [];
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arr.push(callback);
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this.map.set(key, arr);
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}
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emit(key, data = {}) {
|
if (this.map.has(key)) {
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this.map.get(key).forEach((item) => {
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item.call(this, data);
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});
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}
|
}
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}
|
|
let publisher = new Publisher();
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|
// 页面扩展
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const oldPage = Page;
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Page = function (pageParams) {
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const { onLoad, onShow, onReady } = pageParams;
|
|
pageParams.onLoad = function (params) {
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// 判断是否登陆
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if (isLogin) {
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onLoad && onLoad.call(this, params);
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} else {
|
publisher.on("login", () => {
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isLogin = true;
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onLoad && onLoad.call(this, params);
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});
|
}
|
};
|
|
pageParams.onShow = function () {
|
// 判断是否登陆
|
if (isLogin) {
|
onShow && onShow.call(this);
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} else {
|
publisher.on("login", () => {
|
onShow && onShow.call(this);
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});
|
}
|
};
|
|
pageParams.onReady = function () {
|
// 判断是否登陆
|
if (isLogin) {
|
onReady && onReady.call(this);
|
} else {
|
publisher.on("login", () => {
|
onReady && onReady.call(this);
|
});
|
}
|
};
|
return oldPage(pageParams);
|
};
|
|
module.exports = {
|
publisher,
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};
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