UIBarButtonItem 中的 UIButton 未显示
我的视图中确实加载了以下内容在我的表视图控制器上：
UIButton *change_view = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[change_view setTitle:@"List" forState:UIControlStateNormal];
[change_view addTarget:self action:@selector(toggleView:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithCustomView: change_view];
self.navigationItem.rightBarButtonItem = button;
当我运行程序时，它不显示任何标题或圆角矩形按钮。但是，如果我将类型更改为 UIButtonTypeInfoLight，它将显示出来......那么问题是什么？
I have the following in my view did load on my table view controller:
UIButton *change_view = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[change_view setTitle:@"List" forState:UIControlStateNormal];
[change_view addTarget:self action:@selector(toggleView:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithCustomView: change_view];
self.navigationItem.rightBarButtonItem = button;
When I run the program, it doesn't show any title or the rounded rectangle button. However, if I change the type to UIButtonTypeInfoLight, it will show up... so what is the problem?
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我更喜欢下面的方法来设置按钮的边界。
I'd prefer the way below to set the button's bounds.
尝试为您的
change_view设置适当的框架。当您使用
UIButtonTypeInfoLight类型按钮时，使用一些内置尺寸（可能取决于所使用的图标），并应用UIButtonTypeRoundedRect类型默认框架，该框架必须是CGRectZero直角。Try to set an appropriate frame to your
change_view.When you use
UIButtonTypeInfoLighttype button uses some built-in size (likely depended on icon used for it), withUIButtonTypeRoundedRecttype default frame is applied which must beCGRectZerorect.