iOS 7中UINavigation Back Button的自定义图像

Question

我有一个自定义UIBarButtonItem，其图像在iOS 6.1中运行良好。但iOS 7有一个tintColor，它覆盖了我的图像上的这种颜色。如果我将tintColor设置为[UIColor clearColor]，则按钮不会全部显示在一起。

如何在iOS 7中显示我的后退按钮，就像在iOS 6中一样？请帮帮忙？

Answer 1

您应该在UINavigationBar上使用外观来全局设置自定义后退按钮。

[UINavigationBar appearance].backIndicatorImage = customBackButton;
[UINavigationBar appearance].backIndicatorTransitionMaskImage = customBackButton;

Answer 2

尝试在ios7中像这样设置UIBarButtonItem： -

UIImage *temp = [[UIImage imageNamed:@"theImage"] imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal];    
UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithImage:temp style:UIBarButtonItemStyleBordered target:self action:@selector(action)];

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中的原始帖子

要同时支持iOS7及更低版本，请检查system-version并设置如下代码： -

UIImage *temp=nil;

if([[[UIDevice currentDevice] systemVersion] floatValue] < 7.0)
{ 
    temp = [UIImage imageNamed:@"btn-back.png"]; 
}
else
{ 
    temp = [[UIImage imageNamed:@"btn-back.png"] imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal];
 }

Answer 3

对于那些不想混淆现有目标动作等的人来说，以下似乎更有意义。只需复制并粘贴即可。这也迫使iOS使用你的图像及其所有风格 - 而不是简单地使用图像的模板/印象。

- (void)setCustomNavigationBackButton
{
    UIImage *backBtn = [UIImage imageNamed:@"arrow"];
    backBtn = [backBtn imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    self.navigationItem.backBarButtonItem.title=@"";
    self.navigationController.navigationBar.backIndicatorImage = backBtn;
    self.navigationController.navigationBar.backIndicatorTransitionMaskImage = backBtn;
}

arrow是您图片的名称。

Answer 4

swift版本：

var backBtn = UIImage(named: "return_menu")
backBtn = backBtn?.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)

self.navigationController!.navigationBar.backIndicatorImage = backBtn;
self.navigationController!.navigationBar.backIndicatorTransitionMaskImage = backBtn;

Answer 5

以这种方式尝试：

self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStyleBordered target:nil action:nil];
self.navigationController.navigationBar.backIndicatorImage = [UIImage imageNamed:@"yourImageName.png"];
self.navigationController.navigationBar.backIndicatorTransitionMaskImage = [UIImage imageNamed:@"yourImageName.png"];

这将创建全局色调颜色的图像蒙版，它将为您提供自己的自定义图标。不适用于彩色图像。

Answer 6

//添加图像到按钮

UIButton *refreshButton = [UIButton buttonWithType:UIButtonTypeCustom];
[refreshButton setFrame:CGRectMake(0,0,30,30)];
refreshButton.userInteractionEnabled = YES;
[refreshButton setImage:[UIImage imageNamed:@"yourimage.jpg"] forState:UIControlStateNormal];

// ASSIGNING THE BUTTON WITH IMAGE TO BACK BAR BUTTON

UIBarButtonItem *refreshBarButton = [[[UIBarButtonItem alloc] initWithCustomView:refreshButton] autorelease];
self.navigationItem.leftBarButtonItem = refreshBarButton;