[英]Angular 2 http change value in response not affect the page
我對angular 2很新。我試圖在從頁面中使用的參數的http請求獲得響應后更改該值。 我不明白為什么它不會影響頁面,即使控制台日志中的值已更改。
<ons-list>
<ons-list-header>Settings {{testMsg?testMsg:''}}</ons-list-header>
<ons-list-item>
<div class="center">
Enable VoLTE
</div>
<div class="right">
<ons-switch (change)="enabled()"></ons-switch>
</div>
</ons-list-item>
</ons-list>
testMsg = 'before request';
enabled() {
let body = JSON.parse(this._settingService.load(this.pageName));
let url = this._settingService.loadUrl(this.pageName);
this._sesService.getCarsRestful().subscribe(
function (response) {
console.log("Success Response" + response);
this.test2 = response;
// this.showFrame = 'show';
// console.log(this.showFrame);
this.testMsg = 'after request';
console.log(this.testMsg);
},
function (error) { console.log("Error happened" + error) },
function () {
console.log("the subscription is completed");
// console.log(this.test2[0].name);
// this.showFrame = 'show';
}
);
}
當你使用function
你將失去當前this
class
。 你應該使用success
箭頭功能和可觀察的error
功能。 function () {}
應該是() => {}
testMsg = 'before request';
enabled() {
let body = JSON.parse(this._settingService.load(this.pageName));
let url = this._settingService.loadUrl(this.pageName);
this._sesService.getCarsRestful().subscribe(
//changed to arrow function
(response) => {
console.log("Success Response" + response);
this.test2 = response;
// this.showFrame = 'show';
// console.log(this.showFrame);
this.testMsg = 'after request';
console.log(this.testMsg);
},
//changed to arrow function
(error) => { console.log("Error happened" + error) },
//changed to arrow function
() => {
console.log("the subscription is completed");
// console.log(this.test2[0].name);
// this.showFrame = 'show';
}
);
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.