Ios 以编程方式将UINavigationBar添加到UIView?
我试图以编程方式将UINavigationBar添加到UIView中,并且取得了很大成功,但我无法理解它。我试图将它添加到UIView子类中,但在运行应用程序时它根本没有显示出来 这是我的密码:Ios 以编程方式将UINavigationBar添加到UIView?,ios,objective-c,uiview,uinavigationbar,Ios,Objective C,Uiview,Uinavigationbar,我试图以编程方式将UINavigationBar添加到UIView中,并且取得了很大成功,但我无法理解它。我试图将它添加到UIView子类中,但在运行应用程序时它根本没有显示出来 这是我的密码: UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width, headerHeight)]; [navBar setBackgroundColor:
UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width, headerHeight)];
[navBar setBackgroundColor:[UIColor blueColor]];
[self addSubview:navBar];
UIBarButtonItem *doneItem = [[UIBarButtonItem alloc] initWithTitle:@"done" style:UIBarButtonItemStylePlain target:self action:@selector(done:)];
UINavigationItem *navItem = [[UINavigationItem alloc] initWithTitle:@"categories"];
[navItem setRightBarButtonItem:doneItem animated:YES];
[navBar setItems:[NSArray arrayWithObject:navItem] animated:YES];
如果您是从第一个视图使用导航控制器,我建议您在Appdelegate.m中这样做
UIViewController *viewController = [[MenuViewController alloc] initWithNibName:@"FirstViewController" bundle:nil];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:viewController];
self.window.rootViewController=navController;
但是,如果您有一个显示您想要的新视图的视图,您可以使用导航栏来显示新视图:
UIViewController *viewController = [[MenuViewController alloc] initWithNibName:@"MenuViewController" bundle:nil];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:viewController];
[self presentViewController:navigationcontroller animated:YES completion:nil];
然后,您可以在第二个视图中添加导航按钮,如下所示:
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
UIBarButtonItem *btnAdd = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(btnAddGroupPressed)];
self.navigationItem.rightBarButtonItem=btnAdd;
}
return self;
}
我不知道发生了什么事。下面是我用来重现您的问题的代码: *.h文件为空
#import "STTestView.h"
@implementation STTestView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 300, 50)];
navBar.barTintColor = [UIColor purpleColor];
[self addSubview:navBar];
UIBarButtonItem *doneItem = [[UIBarButtonItem alloc] initWithTitle:@"done" style:UIBarButtonItemStylePlain target:self action:@selector(done:)];
UINavigationItem *navItem = [[UINavigationItem alloc] initWithTitle:@"categories"];
[navItem setRightBarButtonItem:doneItem animated:YES];
[navBar setItems:[NSArray arrayWithObject:navItem] animated:YES];
self.backgroundColor = [UIColor darkGrayColor];
}
return self;
}
-(void)done:(id)sender {
}
@end
这就是我得到的:
请你:
initWithFrame:
方法添加代码backgroundColor
属性,而是使用barTintColor
属性希望这有帮助 我无法告诉您原因,但我也遇到过同样的问题,我将其追溯到
setBackgroundColor
方法。为了避开它,我做了:
UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, screenWidth, 44.0)];
UINavigationItem *titleItem = [[UINavigationItem alloc] initWithTitle:@"MyNavBar"];
NSDictionary *titleAttributesDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
[UIColor whiteColor],
UITextAttributeTextColor,
[UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0],
UITextAttributeTextShadowColor,
[NSValue valueWithUIOffset:UIOffsetMake(0, -1)],
UITextAttributeTextShadowOffset,
[UIFont fontWithName:@"HelveticaNeue-Light" size:20.0],
UITextAttributeFont,
nil];
navBar.titleTextAttributes = titleAttributesDictionary;
navBar.items = @[titleItem];
navBar.tintColor=[UIColor blueColor];
[self addSubview:navBar];
在我处理类似问题时,您可能忘记了“navBar.items=@[navItem];”:
UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width, headerHeight)];
navBar.barTintColor = [UIColor blueColor];
[self addSubview:navBar];//it is important point, otherwise, you can see only the area without any item
UIBarButtonItem *doneItem = [[UIBarButtonItem alloc] initWithTitle:@"done" style:UIBarButtonItemStylePlain target:self action:@selector(done:)];
[navItem setRightBarButtonItem:doneItem animated:YES];
[navBar setItems:[NSArray arrayWithObject:navItem] animated:YES];
使用这些属性:“barTintColor”获取导航栏背景的颜色,使用“tintColor”获取导航项和栏按钮项的颜色。如果您使用的是xib而不是故事板,请在AppDelegate中编写以下行:
UIViewController *viewControllerObj = [[MenuViewController alloc] initWithNibName:@"FirstViewController" bundle:nil];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:viewControllerObj];
self.window.rootViewController=navController;
如果您使用的是故事板,那么最好从菜单中添加NavigationController。您使用什么方法获得此代码?我刚试过,它对我有效。此外,设置背景色也不会产生任何效果。您必须在
if(self)
语句中使用init方法期间调用的“tintColor”属性。我不明白为什么它会停止工作,因为我在这里添加了其他子视图。好吧,这确实很奇怪,因为我刚刚再次尝试重现您的场景,它对我有效。我相信问题可能是“headerHeight”设置为0。忘记了包括它。设置为44.0,“barTintColor”属性。谢谢你的建议,但我已经在问题中解释过了。我正在尝试将UINavigationBar添加到UIView。没有控制器是此问题的一部分。