如何呈现UIViewController以模态方式显示Blured Background中的Controller？

Question

拥有UIViewController1和UIViewController2我想以UIViewController2形式提供UIViewController1。我可以这样做：

self.presentViewController:animated:completion

我想要做的是呈现UIViewController2，使其大小：100x100，并且像弹出窗口一样位于屏幕的中心。当UIViewController2出现时，UIViewController2的周围应显示某种玻璃层，您可以看到UIViewController1模糊。

我该怎么做？

Answer 1

实施UIViewControllerTransitioningDelegate

https://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UIViewControllerTransitioningDelegate_protocol/index.html

这是一个教程：

http://www.raywenderlich.com/96062/custom-view-controller-presentation-transitions-swift

Answer 2

在UIViewController中添加UIView2 100x100

的.m

@property (weak, nonatomic) IBOutlet UIView *view2;

·H

- (void)viewDidLoad 
{
    [super viewDidLoad];

    self.view2.hidden = YES;
}

从按钮或代码调用view2：

[self showView2];

并表明：

-(void) showView2
{
    self.view2.hidden = NO;


    self.view.opaque = NO;
    self.view.alpha = 0.5;
    self.view.backgroundColor = [UIColor colorWithWhite:0.3 alpha:1];
}

Answer 3

你必须使用transitioningDelegate for UIViewController。你有一个非常好的例子，类似于你想要实现的目标：

https://github.com/schneiderandre/popping

使用PresentingAnimator类来了解CustomTransitionViewController的呈现方式。您不必在动画中使用POP框架，只需使用UIView类方法为框架设置动画：

+ (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay usingSpringWithDamping:(CGFloat)dampingRatio initialSpringVelocity:(CGFloat)velocity options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion NS_AVAILABLE_IOS(7_0);

重要：您必须使用UIModalPresentationCustom将presentViewController显示在显示的后面。