UIPopover等屏宽度

Question

我需要使弹出尺寸等设备屏幕宽度，这是可能的吗？我尝试这样的代码：

ShareViewController *shareVC = [[ShareViewController alloc] init];
sharePopover = [[UIPopoverController alloc] initWithContentViewController:shareVC];
sharePopover.popoverContentSize = shareVC.view.frame.size; // width there is 1024 i'm sure
sharePopover presentPopoverFromRect:CGRectMake(sender.frame.origin.x, sender.frame.origin.y + 10, sender.frame.size.width, sender.frame.size.height) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];

我还试着用数字来设置popoverContentSize中的宽度，比如1024，或者更大，但是没有效果，我在左边和右边有一些空格，我如何修复它呢？

这里是问题的截图：http://uaimage.com/image/c54d471d

Answer 1

来自苹果的UIPopoverController文档，关于“popoverLayoutMargins”属性(可以在这里找到：UIPopoverController文档：

The margins that define the portion of the screen in which  
it is permissible to display the popover....
...The edge inset values are measured in points from the edges of the screen,  
relative to the current device orientation...  
...The default edge insets are 10 points along each edge.  

尝试添加以下内容，看看是否有帮助：

sharePopover.popoverLayoutMargins = UIEdgeInsetsZero;