自定义UIBarButtonItem的较小活动区域

我也注意到了这种奇怪。我发现使用容器UIView可以解决这个问题。例如:

UIButton *menuButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 30, 30)];
[menuButton addTarget:self action:@selector(revealMenu:) forControlEvents:UIControlEventTouchUpInside];
[menuButton setImage:[UIImage imageNamed:@"menuIcon"] forState:UIControlStateNormal];
UIView *menuButtonContainer = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 30, 30)];
[menuButtonContainer addSubview:menuButton];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:menuButtonContainer];

我想你还没有改变自定义按钮的大小。。。 试着这样做。。。 在Interface builder中,选择要缩小活动区域的按钮,然后按“Command+3”或“tools-->Size inspector”以缩小“W”和“H”值。。。 这将使自定义按钮更小,因此活动区域也会减少。。。

~Raviraja

您是通过Interface Builder添加按钮还是以编程方式添加按钮?无论哪种方式,都可以使用这行代码设置图像的边界:

yourButton.bounds = CGRectMake( 0, 0, yourImage.size.width, yourImage.size.height );  

如果您想要一个完整的示例,下面是我在我的一个应用程序中使用的示例:

    UIImage *image = [UIImage imageNamed:@"audio-off.png"];
    UIButton *myMuteButton = [UIButton buttonWithType:UIButtonTypeCustom];
    myMuteButton.bounds = CGRectMake( 0, 0, image.size.width, image.size.height );    
    [myMuteButton setImage:image forState:UIControlStateNormal];
    [myMuteButton addTarget:self action:@selector(mute) forControlEvents:UIControlEventTouchUpInside];    
    UIBarButtonItem *myMuteBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:myMuteButton];   
    navBar.leftBarButtonItem = myMuteBarButtonItem;
    [myMuteBarButtonItem release];