我有一个带有自定义UIBarButtonItem的UINavigationBar,其中使用UIButton作为其自定义视图。问题在于:自定义按钮的活动区域太大了,如果我在按钮外部至少点击40个像素,它仍然被注册为对按钮的点击。这会导致意外的点击。如何减少这些按钮的活动区域?
我有一个带有自定义UIBarButtonItem的UINavigationBar,其中使用UIButton作为其自定义视图。问题在于:自定义按钮的活动区域太大了,如果我在按钮外部至少点击40个像素,它仍然被注册为对按钮的点击。这会导致意外的点击。如何减少这些按钮的活动区域?
我也发现了这种奇怪的问题。我发现使用一个容器 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];
yourButton.bounds = CGRectMake( 0, 0, yourImage.size.width, yourImage.size.height );
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];
我觉得你还没有改变自定义按钮的大小...尝试这样做...在接口构建器中选择要减少活动区域的按钮,然后按“Command+3”或“工具--> 尺寸检查器”来减小 'W' 和 'H' 值...这将使自定义按钮变小,因此活动区域也会减小...
~Raviraja