如何使用自定义UINavigationBar [英] How to use custom UINavigationBar
问题描述
我有 UINavigationBar
的子类。
@interface MyNavigationBar : UINavigationBar
做了一些更改,现在想要我的应用程序 NavigationController
会使用它:
Made some changes and now want that my application NavigationController
would use it:
_navigationController = [[UINavigationController alloc] initWithRootViewController:self.viewController];
[_window addSubview:[_navigationController view]];
[self.window makeKeyAndVisible];
我希望_ navigationController 会有 MyNavigationBar
如何做到这一点?
谢谢。
推荐答案
您必须在其中创建一个带有 UINavaigationController
的xib。然后,您可以在Interface Builder中选择 navigationBar
,并将该类更改为 UINavigationBar
的子类。
You have to create a xib with a UINavaigationController
in it. You can then select the navigationBar
in Interface Builder and change the class to your subclass of UINavigationBar
.
然后为了使实例化更容易,我将一个类别添加到`UINavigationController中:
Then to make this a little easier to instantiate I add a category to `UINavigationController like:
@interface UINavigationController (DSCNavigationController)
+ (UINavigationController *)dsc_navigationControllerWithRootViewController:(UIViewController *)rootViewController;
@end
@implementation UINavigationController (DSCNavigationController)
+ (UINavigationController *)dsc_navigationControllerWithRootViewController:(UIViewController *)rootViewController;
{
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"DSCNavigationController" owner:nil options:nil];
NSAssert(1 == [topLevelObjects count], @"DSCNavigationController should have one top level object");
UINavigationController *navigationController = [topLevelObjects objectAtIndex:0];
NSAssert([navigationController isKindOfClass:[UINavigationController class]], @"Should have a UINavigationController");
[navigationController pushViewController:rootViewController animated:NO];
return navigationController;
}
@end
在班级的顶部使用它确保在我的情况下导入类别它看起来像
At the top of the class that uses it makes sure to import the category in my case it looks like
#import "UINavigationController+DSCNavigationController"
然后使用它看起来像
MyViewController *myViewController = [[MyViewController alloc] init];
UINavigationController *navigationController = [UINavigationController dsc_navigationControllerWithRootViewController:myViewController];
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