Question

backButton =  [UIButton buttonWithType:UIButtonTypeCustom];

[backButton addTarget:self action:@selector(gotoAmphorasViewController) forControlEvents:UIControlEventTouchUpInside];

[backButton setFrame:CGRectMake(0.0f,0.0f, 44,44)];

我面临的问题是，虽然按钮尺寸为44*44，但只要点击它周围的任何地方，就会触发按钮操作。

Answer 1

它不是一个错误。这是默认行为。在iPhone中，对于导航栏按钮，触摸检测稍微扩展而不是其框架。只需看看其他任何应用程序。如果我们在靠近它的框架之外点击按钮就会被触发。

Answer 2

这是预期的行为，如果您真的想限制触摸区域，可以将按钮包裹在UIView中：

UIView *buttonContainer = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 44, 44)];
[buttonContainer addSubview:button];
_barButton = [[UIBarButtonItem alloc] initWithCustomView:buttonContainer];

Answer 3

请尝试以下代码：工作正常

- (void)viewDidLoad {
    [super viewDidLoad];
UIImage *buttonImage = [UIImage imageNamed:@"back.png"];

    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

    [button setImage:buttonImage forState:UIControlStateNormal];


    button.frame = CGRectMake(0, 0, buttonImage.size.width, buttonImage.size.height);

     [button addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];

    UIBarButtonItem *customBarItem = [[UIBarButtonItem alloc] initWithCustomView:button];

    self.navigationItem.leftBarButtonItem = customBarItem;
    [customBarItem release];



}

-(void)back {

[self.navigationController popViewControllerAnimated:YES];
}

导航栏自定义按钮

3 个答案: