[英]Limiting the touch area in the navigation barbutton item?
在iPhone中,我知道导航栏按钮的触摸在导航栏下也有一些扩展。但是我需要将用户交互限制为一个特定的限制。我能够做到这一点。有人可以帮助我吗?
Implement a tap gesture recognizer and set your controller as delegate. 实现轻击手势识别器,并将您的控制器设置为委托。 Then implement:
然后执行:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
// [touch locationInView] -> gives the point where the user touched
// If the touch point belongs to your frame then return YES
// else return NO
}
You can implement a custom navigation bar yourself with hidden navigation bar "engine" behind and have the buttons on the custom navbar with the required custom behavior/visuals. 您可以自己实现自定义导航栏,并在其后方隐藏隐藏的导航栏“引擎”,并使自定义导航栏上的按钮具有所需的自定义行为/视觉效果。 This also can be useful if you want to implement gesture logic (pan) to switch navigation pages.
如果要实现手势逻辑(平移)以切换导航页面,这也可能很有用。
AppDelegate.h: AppDelegate.h:
@property (strong, nonatomic) UINavigationController *navigationController;
AppDelegate.m: AppDelegate.m:
YourMainViewController *yourmainViewController = [[YourMainViewController alloc] init];
_navigationController = [[UINavigationController alloc] yourmainViewController];
[_navigationController setNavigationBarHidden:TRUE];
[self.window setRootViewController:_navigationController];
[self.window makeKeyAndVisible];
YourMainViewController.m: implement your view with custom navigation image and added buttons for navigation either using Interface Builder or programatically. YourMainViewController.m:使用自定义导航图像和添加的用于使用Interface Builder或以编程方式进行导航的按钮来实现视图。 For example programatically create your view:
例如,以编程方式创建视图:
- (void)loadView {
...
UIImageView *tmp_mynavbar = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"CustomNavBG.png"]];
tmp_mynavbar.frame = CGRectMake(0, 0, 320, 44);
[self.view addSubview:tmp_mynavbar];
UIButton *tmp_addbutton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
tmp_addbutton.frame = CGRectMake(260, 10, 40, 20);
[tmp_addbutton setTitle:@"Add" forState:UIControlStateNormal];
[tmp_addbutton setBackgroundImage:[UIImage imageNamed:@"CustomNavAddBtn.png"] forState:UIControlStateNormal];
[tmp_addbutton addTarget:self action:@selector(pressedbuttonAddItem:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:tmp_addbutton];
// create button with the required size, user interaction area (add image then add transparent button with different size, etc)
// also add a back button
...
}
then implement custom navigation button behavior (the add/next button and also the back button) 然后实现自定义导航按钮行为(添加/下一个按钮以及后退按钮)
-(void) pressedbuttonAddItem:(id) sender {
AppDelegate *app = (AppDelegate*) [[UIApplication sharedApplication] delegate];
DetailViewController *detailViewController = [[DetailViewController alloc] init];
[[app navigationController] detailViewController animated:YES];
}
-(void) pressedbuttonBack:(id) sender {
AppDelegate *app = (AppDelegate*) [[UIApplication sharedApplication] delegate];
[[app navigationController] popViewControllerAnimated:YES];
}
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