我如何缩放整个屏幕（包括标签、按钮和图像）？ IOS, Swift 3

Question

此代码似乎不起作用。想知道我在做什么 wrong/missing。我假设我：将 UIPinchGestureRecognizer 拖放到 viewcontroller（这样它就不会干扰与按钮、标签等的连接，并且它已连接到 viewcontroller）；然后执行此代码（确保连接正确）：

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()
}

}

请帮忙！

Answer 1

您可以将可缩放的 UIView 放入 UIScrollView 中，然后实现此方法

func viewForZooming(in scrollView: UIScrollView) -> UIView? {
    return self.view
}

你还需要设置你的 scrollView 委托并设置你的 self.scrollView.maximumZoomScale > self.scrollView.minimumZoomScale 像这样

    self.scrollView.delegate = self
    self.scrollView.maximumZoomScale = 2.0
    self.scrollView.minimumZoomScale = 0.5

然后使用俯仰手势必须缩放你的`self.view

希望对您有所帮助，祝好

我如何缩放整个屏幕（包括标签、按钮和图像）？ IOS, Swift 3

How do i pinch to zoom the entire screen (including labels, buttons and images)? IOS, Swift 3

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