我有一个基于选项卡的应用程序，当单击一个按钮将加载新的Uiview时，我试图更改UINavigationBar的标题，但未显示任何内容！
我创建这样的栏：
navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, screenWidth, 60)];
navBar.barTintColor = [UIColor colorWithRed:0.082 green:0.118 blue:0.141 alpha:1.0];
navBar.tintColor = [UIColor whiteColor];
navBar.translucent = NO;
[self.view addSubview:navBar];
然后在方法中，我尝试更改：
UIView *sendASongView = [[UIView alloc] init];
[sendASongView setFrame: CGRectMake(0, 60, screenWidth, screenHeight-110)];
[sendASongView setBackgroundColor:[UIColor whiteColor]];
[self.view addSubview:sendASongView];
navBar.topItem.title = @"Send";
最佳答案
您可以创建一个UINavigationController并将其用作viewController的容器。
- (void)loginViewShowingLoggedInUser:(FBLoginView *)loginView {
self.statusLabel.text = @"You're logged in as";
HomeNavViewController *profileviewController = [[HomeNavViewController alloc] init];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController: profileviewController] ;
CATransition *transition = [CATransition animation];
transition.duration = 0.3;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = kCATransitionPush;
transition.subtype = kCATransitionFromRight;
[self.view.window.layer addAnimation:transition forKey:nil];
[self presentModalViewController:nav animated:NO];
}
覆盖
viewWillAppear中的方法YourViewController- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated] ;
self.title = @"Sender" ;
}