我有UINavigationBar
的子类。
@interface MyNavigationBar : UINavigationBar
进行了一些更改,现在希望我的应用程序
NavigationController
将使用它: _navigationController = [[UINavigationController alloc] initWithRootViewController:self.viewController];
[_window addSubview:[_navigationController view]];
[self.window makeKeyAndVisible];
我希望_navigationController具有MyNavigationBar
如何做到这一点?
谢谢。
最佳答案
您必须使用xcc创建一个xib。然后,您可以在Interface Builder中选择UINavaigationController
,并将该类更改为navigationBar
的子类。
然后,为了使实例化起来更容易一些,我向UINavigationController添加了一个类别,例如:
@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
在使用它的类的顶部,请确保在我的情况下导入类别,例如
#import "UINavigationController+DSCNavigationController"
然后使用它看起来像
MyViewController *myViewController = [[MyViewController alloc] init];
UINavigationController *navigationController = [UINavigationController dsc_navigationControllerWithRootViewController:myViewController];