我可能missunderstood了一些概念,但在閱讀4個主題上的stackoverflow和「私人成員在打字稿」的文檔 - 我仍然困惑。打字稿私人方法「不是一個功能」
我正在寫簡單的鼠標IO(第一個打字稿項目)。這是發生故障的鼠標類的全碼:
class Mouse {
public left: MouseKeyData = new MouseKeyData();
public right: MouseKeyData = new MouseKeyData();
public whell: MouseKeyData = new MouseKeyData();
public x: number = 0;
public y: number = 0;
private crossBrowserButton(e: any):string {
switch (e.button) {
case 0: return 'left';
case 1: return 'whell';
case 2: return 'right';
case 3: return 'back';
case 4: return 'forward';
}
return 'none';
}
private onMouseDown(e: any):void {
let target: MouseKeyData = this.left;
try {console.log(this.crossBrowserButton(e))} catch (a) {console.warn(a)} finally {}
if(target) {
target.press();
}
}
private onMouseUp(e: any):void {
let target: MouseKeyData = this.left;
if(target) {
target.release();
}
}
private onMouseMove(e: any): void {
this.x = e.pageX;
this.y = e.pageY;
}
public constructor() {
let anchor = document.body;
anchor.addEventListener('mousedown', this.onMouseDown);
anchor.addEventListener('mouseup', this.onMouseUp);
anchor.addEventListener('mousemove', this.onMouseMove);
}
}
我習慣叫this.crossBrowserButton(e)
內onMouseDown
和onMouseUp
,但我只this.crossBrowserButton is not a function(…)
了。
我覺得我失去了this
範圍一些在這裏,但this.left
完美的作品。
在此先感謝!
我正在投票結束這個問題,因爲這個錯誤在低技術水平的世界很常見,我想通了什麼是錯的。 –