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我使用此代码将投影添加到另一个视图上的视图。ViewController在ViewController上的视图:我想在左边放一个阴影吗?
CGRect rect = CGRectMake(90, 0, 230, 460);
FeedsViewController *feedsViewController = [[FeedsViewController alloc] init];
[feedsViewController.view setFrame:rect];
self.feedsViewController = feedsViewController;
[feedsViewController release];
[[feedsViewController.view layer] setShadowOffset:CGSizeMake(0, 1)];
[[feedsViewController.view layer] setShadowColor:[[UIColor darkGrayColor] CGColor]];
[[feedsViewController.view layer] setShadowRadius:3.0];
[[feedsViewController.view layer] setShadowOpacity:0.8];
[self.view.superview addSubview:feedsViewController.view];
但它不起作用,为什么?
关于_how_的某些信息不起作用会很有用。 – jrturton