自定义“按下” UIBarButtonItem 背景

Question

我正在尝试为我的 UIBarButtonItem 设置自定义按下的图像，但似乎没有任何效果。根据我的理解，下面的代码应该可以工作，但是尽管将图像设置为突出显示状态，但按钮在按下时看起来完全一样。

有什么想法吗？

UIImage *barButtonBackground = [[UIImage imageNamed:ANBarButtonItemBackgroundImageName] resizableImageWithCapInsets:UIEdgeInsetsMake(5.0f,5.0f, 5.0f, 5.0f)];
UIImage *barButtonPressedBackground = [[UIImage imageNamed:ANBarButtonPressedImageName] resizableImageWithCapInsets:UIEdgeInsetsMake(5.0f,5.0f, 5.0f, 5.0f)];

[self.navigationItem.leftBarButtonItem setBackgroundImage:barButtonBackground forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[self.navigationItem.rightBarButtonItem setBackgroundImage:barButtonBackground forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

[self.navigationItem.leftBarButtonItem setBackgroundImage:barButtonPressedBackground forState:UIControlStateHighlighted barMetrics:UIBarMetricsDefault];
[self.navigationItem.rightBarButtonItem setBackgroundImage:barButtonPressedBackground forState:UIControlStateHighlighted barMetrics:UIBarMetricsDefault];

Answer 1

我认为您应该为与您的配色方案匹配的不同控制状态创建一个带有背景图像的custom UIButton，然后使用这个UIButton作为视图custom UIBarButtonItem。

UIButton *customButton = [UIButton buttonWithType:...];

[customButton setBackgroundImage:barButtonBackground  forState:UIControlStateNormal];
[customButton setBackgroundImage:barButtonPressedBackground  forState:UIControlStateSelected];

UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView: customButton];

如果您想要其他参考资料，那么您可以通过这个漂亮的链接：Using Appearance Proxy to Style Apps

Answer 2

你可以试试这样。对我有用。

UIImage* image3 = [UIImage imageNamed:@"mail-48_24.png"];
CGRect frameimg = CGRectMake(0, 0, image3.size.width, image3.size.height);
UIButton *someButton = [[UIButton alloc] initWithFrame:frameimg];
[someButton setBackgroundImage:image3 forState:UIControlStateNormal];
[someButton addTarget:self action:@selector(sendmail)
     forControlEvents:UIControlEventTouchUpInside];
[someButton setShowsTouchWhenHighlighted:YES];

UIBarButtonItem *mailbutton =[[UIBarButtonItem alloc] initWithCustomView:someButton];
self.navigationItem.rightBarButtonItem=mailbutton;
[someButton release];

Answer 3

也许这会对您有所帮助（只需将该文件添加到项目中）：

UIBarButtonItem+customLook.h

#import <UIKit/UIKit.h>

@interface UIBarButtonItem (customLook)

+ (UIBarButtonItem *)barButtonItemWithImage:(UIImage *)image selectedBackGroundImage:(UIImage *)selected target:(id)target action:(SEL)selector;

@end

UIBarButtonItem+customLook.m

#import "UIBarButtonItem+customLook.h"

@implementation UIBarButtonItem (customLook)

+ (UIBarButtonItem *)barButtonItemWithImage:(UIImage *)image selectedBackGroundImage:(UIImage *)selected target:(id)target action:(SEL)selector
{
    UIButton* someButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [someButton setImage:image forState:UIControlStateNormal];
    [someButton setBackgroundImage:selected forState:UIControlStateSelected];

    CGSize size = image.size;
    CGRect frame = CGRectZero;
    frame.size.width = size.width;
    frame.size.height = 30.0f; // Standart height
    someButton.frame = frame;

    [someButton addTarget:target action:selector forControlEvents:UIControlEventTouchUpInside];

    UIBarButtonItem* backButton = [[UIBarButtonItem alloc] initWithCustomView:someButton];

    return backButton;
}

@end

一些视图控制器：

#import "UIBarButtonItem+customLook.h"
...

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIBarButtonItem *bbi = [UIBarButtonItem barButtonItemWithImage:[UIImage imageNamed:@"29-heart-selected.png"]
                                          selectedBackGroundImage:[UIImage imageNamed:@"DarkButton_Pressed.png"]
                                                            target:self
                                                            action:@selector(someAction:)];
    self.navigationItem.rightBarButtonItem = bbi;
}

...

- (void)someAction:(id)sender
{
    [(UIButton *)sender setSelected:YES];
}

Answer 4

    UIImage* btnImage = [UIImage imageNamed:@"share-icon-deselected-16x16.png"];
    CGRect frameimg = CGRectMake(0, 0, btnImage.size.width, btnImage.size.height);
    UIButton *someButton = [[UIButton alloc] initWithFrame:frameimg];
    [someButton setBackgroundImage:btnImage forState:UIControlStateNormal];
    [someButton addTarget:self action:@selector(share:)
         forControlEvents:UIControlEventTouchUpInside];
    [someButton setShowsTouchWhenHighlighted:YES];

    UIBarButtonItem *mailbutton =[[UIBarButtonItem alloc] initWithCustomView:someButton];
    self.navigationItem.rightBarButtonItem=mailbutton;




- (void)share:(id)sender{
    UIButton*btn = (UIButton*)sender;
    if (btn.isSelected)
    {
        [btn setSelected:NO];
        [btn setBackgroundImage:[UIImage imageNamed:@"share-icon-deselected-16x16.png"] forState:UIControlStateNormal];
    }
    else
    {
        [btn setSelected:YES];
        [btn setBackgroundImage:[UIImage imageNamed:@"share-icon-selected-16x16.png"] forState:UIControlStateNormal];
    }
};