iphone - 更改 UIBarButtonSystemItemCancel 的颜色

Question

如果我使用 UIBarButtonSystemItemCancel，它的颜色设置为导航栏的颜色。但是，在照片应用程序中，“取消”按钮以蓝色背景显示。请问如何将 UIBarButtonSystemItemCancel 设置为蓝色背景？

Answer 1

您可以将图像用作按钮图像

UIImage *buttonImage = [UIImage imageNamed:@"image.png"];

//create the button and assign the image
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:buttonImage forState:UIControlStateNormal];


//create a UIBarButtonItem with the button as a custom view
//UIBarButtonItem *customBarItem = [[UIBarButtonItem alloc] initWithCustomView:button];

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

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




self.navigationItem.rightBarButtonItem = rightBarButtonItem;

Answer 2

将 theNavigationController.navigationBar.barStyle 设置为 UIBarStyleBlackTranslucent

theNavigationController.navigationBar.barStyle = UIBarStyleBlackTranslucent;

并且按钮默认为蓝色。

Answer 3

有比使用图像更好的方法。UISegmentedControl 可以配置为看起来就像 UIBarButtonItem 并且 UISegmentedControl 具有 tintColor 属性。

UISegmentedControl *button = [[[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:itemTitle, nil]] autorelease];
    button.momentary = YES;
    button.segmentedControlStyle = UISegmentedControlStyleBar;
    button.tintColor = color;
    [button addTarget:theTarget action:selector forControlEvents:UIControlEventValueChanged];

    UIBarButtonItem *removeButton = [[[UIBarButtonItem alloc] initWithCustomView:button] autorelease];

我构建了一个UIBarButtonItem 类别来执行此操作。