iOS SDK：如何在切换相机时使视图翻转

在iOS/Objective C上相当新。我正在根据苹果的（视频捕获）示例代码制作mods，并希望在前后摄像头之间切换时模仿本机摄像头的翻转动画。这似乎很容易，但我不知道怎么做。欢迎提出建议

谢谢

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标记这确实是一项简单的任务。您只需在更改

previewView

输入之前从

UIView

调用该方法即可

如果您的目标是iOS 8.0或更高版本，还可以轻松添加模糊效果

Swift 2

let blurView = UIVisualEffectView(frame: previewView.bounds)
blurView.effect = UIBlurEffect(style: .Light)
previewView.addSubview(blurView)

UIView.transitionWithView(previewView, duration: 0.4, options: .TransitionFlipFromLeft, animations: nil) { (finished) -> Void in
    blurView.removeFromSuperview()
}

Swift 3、4、5

let blurView = UIVisualEffectView(frame: previewView.bounds)
blurView.effect = UIBlurEffect(style: .light)
previewView.addSubview(blurView)

UIView.transition(with: previewView, duration: 0.4, options: .transitionFlipFromLeft, animations: nil) { (finished) -> Void in
    blurView.removeFromSuperview()
}

目标-C

UIVisualEffectView *blurView = [[UIVisualEffectView alloc] initWithFrame:_previewView.bounds];
blurView.effect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
[_previewView addSubview:blurView];

[UIView transitionWithView:_previewView duration:0.4 options:UIViewAnimationOptionTransitionFlipFromLeft animations:nil completion:^(BOOL finished) {
    [blurView removeFromSuperview];
}];