Swift可可按鈕不到位

Question

我是新做Cocoa Touch，但是我工作過白色的java swing，我做了我想畫的按鈕在屏幕上，一個在左邊（綠色）和其他在右邊（藍色） ，但我只看到另一個失蹤的藍色。這是一個有兩個按鈕的視圖。

import UIKit 

class MouseClick: UIView { 
//MARK: Atributes 
var clicks = [UIButton]() 

//MARK: Initializer 
required init?(coder aDecoder: NSCoder){ 
    super.init(coder: aDecoder) 
    //let bounds = UIScreen.mainScreen().bounds 

    let button = UIButton() 

    // x: start of x in frame, y: start of y in frame width:half screen, height:full screen 
    let leftButtonFrame = CGRect(x: frame.origin.x, y:frame.origin.y, width: frame.size.width/2.0, height:frame.size.height) 
    // x: start of x in frame plus the half, y: start of y in frame width:half screen, height:full screen 
    let rigthButtonFrame = CGRect(x: frame.origin.x + frame.size.width/2.0, y: frame.origin.y, width: frame.size.width/2.0, height: frame.size.height) 

    //test action (only prints) 
    button.addTarget(self, action: "clickAction:", forControlEvents: .TouchDown) 

    clicks = [button, button] 

    clicks[0].frame = leftButtonFrame 
    clicks[1].frame = rigthButtonFrame 

    clicks[0].backgroundColor = UIColor.greenColor() 
    clicks[1].backgroundColor = UIColor.blueColor() 

    addSubview(clicks[0]) 
    addSubview(clicks[1]) 
} 
override func layoutSubviews() { 
    // Set butons(clicks) size, width:half screen, height:full screen 
    let buttonSize = Int(frame.size.height) 

    var buttonFrame = CGRect(x: 0.0, y: 0.0, width: frame.size.width/2.0, height: CGFloat(buttonSize)) 

    // set x position for every button in clixk 

    for (index, button) in clicks.enumerate() { 
     buttonFrame.origin.x = CGFloat(index) * frame.size.width/2.0 
     button.frame = buttonFrame 
    } 
} 
override func intrinsicContentSize() -> CGSize { 
    let heigth = Int(frame.size.height) 
    let width = Int(frame.size.width) 
    return CGSize(width: width, height: heigth) 
} 
//MARK: Clicks actions 
func clickAction(button: UIButton) 
{ 
    var n = clicks.indexOf(button)! 
    if n == 0 
    { 
     print("leftie") 
    } else 
    { 
     print("rightie") 
    } 
} 
} 

這裏生成的圖像，

] 1

Answer 1

的問題是，你初始化只有一個按鈕。 'clicks'數組包含兩個指向同一個Button的引用。這就是爲什麼你只能在屏幕上看到一個。

let button = UIButton() 
let button2 = UIButton() 

。 。 。

clicks = [button, button2] 

現在你有兩個按鈕。