presenting透明度和动画视图控制器 [英] Presenting a view controller with transparency and animation

问题描述

我设置 self.window.rootViewController.modal presentationStyle = UIModal presentationCurrentContext; 在我的应用程序委托，这样我可以present一个视图控制器，而且认为是透明的（见本SO <一个href=\"http://stackoverflow.com/questions/587681/how-to-use-$p$psentmodalviewcontroller-to-create-a-transparent-view\">question).

I'm setting self.window.rootViewController.modalPresentationStyle = UIModalPresentationCurrentContext; in my Application Delegate so that I can present a view controller and have the view be transparent (see this SO question).

这个伟大的工程，只有一句话是，我没能当动画视图控制器是presented。有没有人得到这个工作？如果不是这样，我有什么其他选择？

This works great, only remark is that I'm not able to animate when the view controller is presented. Has anyone gotten this to work? If not, what other options do I have?

视图控制器我presenting是一个演练，它由一个的UIScrollView 和 UIPageControl 是应该悬停在接口上，所以你可以看到它的背景微翘的边缘。

The view controller I'm presenting is a "walkthrough" that consists of a UIScrollView and UIPageControl that is supposed to "hover" over the interface so you can see the background of it slightly at the edges.

推荐答案

我落得这样做的：

AppDelegate *appDelegate = [AppDelegate sharedAppDelegate];

// Set the root VC modal presentation style
appDelegate.window.rootViewController.modalPresentationStyle = UIModalPresentationCurrentContext;

WalkthroughViewController *walkthroughVC = [[WalkthroughViewController alloc] initWithNibName:nil bundle:nil];

[self presentViewController:walkthroughVC animated:NO completion:nil];

// Manually animate the view
walkthroughVC.view.alpha = 0;
[UIView animateWithDuration:0.5 animations:^{
       walkthroughVC.view.alpha = 1;
}];

// Reset root VC modal presentation style 
appDelegate.window.rootViewController.modalPresentationStyle = UIModalPresentationFullScreen;

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