我正在制作UIBarButton如下：
// Create "back" UIBarButtonItem UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom]; backButton.frame = CGRectMake(0,28,17); [backButton addTarget:self action:@selector(backButtonTapped) forControlEvents:UIControlEventTouchUpInside]; backButton.showsTouchWhenHighlighted = YES; UIImage *backButtonImage = [UIImage imageNamed:@"back-button.png"]; [backButton setBackgroundImage:backButtonImage forState:UIControlStateNormal]; UIBarButtonItem *backBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton]; [toolBarItems addObject:backBarButtonItem];
但是,水龙头的目标很小.更准确地说,它们是自定义图像的大小. (这又是微小的)有没有办法增加他们的目标的大小？
(注意：改变UIButtons的frame属性只是拉伸图像.)
解决方法
您的代码的细微变化将会做到这一点
需要更改：
>我假设backButtonImage的大小是{28,17},并将按钮框设置为CGRectMake(0,48,37)
>删除backGroundImage并使用setImage：
>将属性imageEdgeInsets设置为UIEdgeInsetsMake(10,10,10)
你的代码将如下所示：
UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom]; backButton.frame = CGRectMake(0,37); [backButton addTarget:self action:@selector(backButtonTapped) forControlEvents:UIControlEventTouchUpInside]; backButton.showsTouchWhenHighlighted = YES; UIImage *backButtonImage = [UIImage imageNamed:@"back-button.png"]; [backButton setImage:backButtonImage forState:UIControlStateNormal]; backButton.imageEdgeInsets = UIEdgeInsetsMake(10,10); UIBarButtonItem *backBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton]; [toolBarItems addObject:backBarButtonItem];
您可以根据您的要求更改框架和imageEdgeInsets的值.这段代码为我工作.
