如何将 UIPinchGestureRecognizer 与整个视图一起使用以缩放整个屏幕？ Swift3、IOS

Question

我似乎无法将我的动作（捏合手势）连接到我的视图，而是连接到 viewcontroller。这是我在视图控制器中编写的所有代码以测试代码：

import UIKit

class AlertController: UIAlertController {

@IBAction func scaleImage(sender: UIPinchGestureRecognizer) {
    self.view.transform = CGAffineTransformScale(self.view.transform, sender.scale, sender.scale)
    sender.scale = 1
}
override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    view.backgroundColor = UIColor.blackColor()
}

override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning()
}

}

我只想放大我在我的应用程序中填写的表单（文本框 - 按钮和标签，复选框 - 按钮和标签，背景图像 - 图像视图）。我希望能够一次放大所有内容。我失败得很惨。请帮忙！ :)

Answer 1

首先制作识别器：

let pinchGestureRecognizer = UIPinchGestureRecognizer(target: self, action: #selector(pinchHandler))

然后创建处理函数：

func pinchHandler(recognizer : UIPinchGestureRecognizer) {

    print ("PINCHING NOW")

    if let view = self.view {
        view.transform = view.transform.scaledBy(x: recognizer.scale, y: recognizer.scale)
        recognizer.scale = 1
    }
}

在 viewDidLoad 中添加识别器：

pinchGestureRecognizer.addTarget(self, action: #selector(pinchHandler))
view.addGestureRecognizer(pinchGestureRecognizer)

如何将 UIPinchGestureRecognizer 与整个视图一起使用以缩放整个屏幕？ Swift3、IOS

How can I use the UIPinchGestureRecognizer with the entire view to zoom the entire screen? Swift 3, IOS

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