[英]ViewController goes black when pushing it in UINavigationcontroller stack
[英]Subview on UINavigationController when pushing viewController animated doesn't look right
在我的UIViewController viewDidLoad中,我有:
myButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
...
myButton.frame = CGRectMake(0, 2, 40, 40);
[self.navigationController.navigationBar addSubview:myButton];
按钮显示就好了。 不,我将另一个viewcontroller推入堆栈:
[self.navigationController pushViewController:vc animated:YES];
当然,Button仍在显示,因此我尝试将其隐藏在viewWillDisappear中并在viewWillAppear中显示,但是过渡效果看起来不正确。 即使将超级调用的顺序与隐藏的调用互换,也看起来不正确。
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
myButton.hidden = YES;
}
- (void)viewWillAppear:(BOOL)animated {
myButton.hidden = NO;
[super viewWillAppear:animated];
}
我怎样做才能使过渡看起来正确? 谢谢。
与其将按钮添加为子视图,不如使用以下内容
UIBarButtonItem *barButton = [[UIBarButtonItem alloc] initWithCustomView:YourCustomView];
self.navigationItem.rightBarButtonItem = barButton;
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