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[英]How to change the size of titleView in navigation bar. Because there's a gap between titleView and backButton in navigationBar
[英]How to get the height of navigationBar's titleView?
我使用一個按鈕作為titleView。 但是,當我想獲取按鈕的高度時,無論何時都不使用self.button.frame.size.height
或self.navigationItem.titleView.frame.size.height
,它總是返回0; 其他值(例如x,y和width)似乎是合理的。
為什么?
In loadView
{
self.switchButton = [UIButton buttonWithType:UIButtonTypeCustom];
[self.switchButton setTitle:@"TapMe" forState:UIControlStateNormal];
self.navigationItem.titleView = self.switchButton;
[self.switchButton addTarget:self action:@selector(doSomeThing:) forControlEvents:UIControlEventTouchUpInside];
}
和
-(void)doSomeThing:(id)sender
{
NSLog(@"height%f", self.switchButton.frame.size.height);
}
self.navigationItems.navagationBar
似乎不正確。
關於什么
CGRectGetHeight(self.navigationItem.titleView.frame)
您可以使用
首先將一個視圖分配給TitleView
UILabel *titiLbl = [[[UILabel alloc]initWithFrame:CGRectMake(0, 0, 100, 44)]autorelease];
titiLbl.text = @"Title Name";
self.navigationItem.titleView = titiLbl;
然后找到titleView的高度
CGRect navigationframe = self.navigationItem.titleView.frame;
NSLog(@"navigationframe Height=%f",navigationframe.size.height);
並請記住,如果未將任何視圖分配給NavigationItem的titleView,它將返回0.000;
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