如何创建帮助叠加，iOS

Question

我正在尝试执行如下图所示的帮助叠加，我该怎么做？

Answer 1

您可以在Photoshop中为每个iPhone大小制作一个叠加图像，其alpha值为50，然后将该图像添加到UIImageView CGRect self.view.frame的{​​{1}}中，并控制隐藏和取消隐藏在图片上的UIGestureRecognizer。

或者您只需制作一张背景色为UIView的{​​{1}}，然后添加每个人＆＃34;手＆＃34;在这个视图中你想要它们的图像。

Answer 2

喜欢

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// get window screen size for frame
CGRect screensize = [[UIScreen mainScreen] bounds];
//create a new UIview with the same size for same view
UIView* TransprentView = [[UIView alloc] initWithFrame:screensize];

// change the background color to black and the opacity to 0.6 for Transparent
TransprentView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.6];

  // here add your Label, Image, etc, what ever you want

// add this TransprentView to your main view
[self.view addSubview:TransprentView];

你可以从superview中删除它：

[TransprentView removeFromSuperview];

Swift 2＆amp;上述

 let TransprentView =  UIView(frame: UIScreen.mainScreen().bounds)

    TransprentView.backgroundColor = UIColor.blackColor().colorWithAlphaComponent(0.5)

    // here add your Label, Image, etc, what ever you want

    self.view.addSubview(TransprentView)

你可以从superview中删除它：

    TransprentView.removeFromSuperview()