iOS 7中的UIBarButtonItem外观问题，这可能是Apple的bug吗？ [英] UIBarButtonItem appearance trouble in iOS 7, could this be an Apple bug?
问题描述
我前段时间看过一篇文章，就在这里：
这可能很傻，但它可能与我的图像有关吗？我将尝试使用不同的图像并发布更新。
- 尝试使用不同的图像并且没有区别，也使用了来自以上发布的样本。这是一个很长的镜头，但由于似乎没有人有更好的想法，但值得一试。
****更新2：**
我在另一个测试应用程序中尝试了这个并将代码移动到应用程序委托的初始化$ b $，它仍然无法正常工作。我在这里发布了这个
以及
顶部链接的原始作者网站。再加上另一个论坛，但似乎没有人有解决方案。
我想知道这可能是Apple的错误吗？
****更新1：**
将代码从 didFinishLaunchingWithOptions 移至 willFinishLaunchingWithOptions 和 init ，但它似乎仍无效。
***** INIT METHOD FROM AppDelegate.m
- （id）init
{
//创建可调整大小的图像
UIImage * gradientImage44 = [[UIImage imageNamed：@navBar_44] resizableImageWithCapInsets：UIEdgeInsetsMake（0,0,0,0）];
UIImage * gradientImage32 = [[UIImage imageNamed：@navBar_32] resizableImageWithCapInsets：UIEdgeInsetsMake（0,0,0,0）];
//为* all设置背景图像* UINavigationBars
[[UINavigationBar appearance] setBackgroundImage：gradientImage44 forBarMetrics：UIBarMetricsDefault];
[[UINavigationBar appearance] setBackgroundImage：gradientImage32 forBarMetrics：UIBarMetricsLandscapePhone];
//自定义* all * UINavigationBars的标题文本
[[UINavigationBar appearance] setTitleTextAttributes：
[NSDictionary dictionaryWithObjectsAndKeys：
[UIColor colorWithRed：255.0 / 255.0 green ：255.0 / 255.0蓝色：255.0 / 255.0 alpha：1.0]，
UITextAttributeTextColor，
[UIColor colorWithRed：0.0绿色：0.0蓝色：0.0 alpha：0.8]，
UITextAttributeTextShadowColor，
[NSValue valueWithUIOffset：UIOffsetMake（1,1）]，
UITextAttributeTextShadowOffset，
[UIFont boldSystemFontOfSize：18.0]，
UITextAttributeFont，
nil]];
//自定义NavBar按钮
UIImage * button30 = [[UIImage imageNamed：@btButton_30] resizableImageWithCapInsets：UIEdgeInsetsMake（0,5,0,5）];
UIImage * button24 = [[UIImage imageNamed：@btButton_24] resizableImageWithCapInsets：UIEdgeInsetsMake（0,5,0,5）];
[[UIBarButtonItem外观] setBackgroundImage：button30 forState：UIControlStateNormal barMetrics：UIBarMetricsDefault];
[[UIBarButtonItem外观] setBackgroundImage：button24 forState：UIControlStateNormal barMetrics：UIBarMetricsLandscapePhone];
[[UIBarButtonItem外观] setTintColor：[UIColor whiteColor]];
[[UIBarButtonItem外观] setTitleTextAttributes：
[NSDictionary dictionaryWithObjectsAndKeys：
// [UIColor colorWithRed：220.0 / 255.0 green：104.0 / 255.0 blue：1.0 / 255.0 alpha：1.0] ，
[UIColor colorWithRed：255.0 / 255.0绿色：255.0 / 255.0蓝色：255.0 / 255.0 alpha：1.0]，
UITextAttributeTextColor，
// [UIColor colorWithRed：1.0绿色：1.0蓝色：1.0 alpha：1.0]，
[UIColor colorWithRed：0.0 green：0.0 blue：0.0 alpha：0.8]，
UITextAttributeTextShadowColor，
[NSValue valueWithUIOffset：UIOffsetMake（0.5,0.5）]，
UITextAttributeTextShadowOffset，
[UIFont systemFontOfSize：12.0]，
UITextAttributeFont，
nil]
forState：UIControlStateNormal];
//自定义后栏按钮
UIImage * btBack_30 = [[UIImage imageNamed：@btBack_30] resizableImageWithCapInsets：UIEdgeInsetsMake（0,13,0,5）];
UIImage * btBack_24 = [[UIImage imageNamed：@btBack_24] resizableImageWithCapInsets：UIEdgeInsetsMake（0,12,0,5）];
[[UIBarButtonItem外观] setBackButtonBackgroundImage：btBack_30 forState：UIControlStateNormal barMetrics：UIBarMetricsDefault];
[[UIBarButtonItem外观] setBackButtonBackgroundImage：btBack_24 forState：UIControlStateNormal barMetrics：UIBarMetricsLandscapePhone];
返回[super init];
}
它看起来像Apple bug，你应该用bug报告器输入一个bug。也就是说，我可以给你一个相对无痛的解决方法：将此代码添加到RecipetTableViewController：
- （void）viewDidLoad
{
[super viewDidLoad];
self.title = @Recipe Book;
UIBarButtonItem * it = [[UIBarButtonItem alloc] initWithTitle：self.title style：UIBarButtonItemStylePlain target：nil action：NULL];
UIImage * btBack_30 = [[UIImage imageNamed：@btBack_30] resizableImageWithCapInsets：UIEdgeInsetsMake（0,13,0,5）];
[it setBackButtonBackgroundImage：btBack_30 forState：UIControlStateNormal barMetrics：UIBarMetricsDefault];
self.navigationItem.backBarButtonItem = it;
}
编辑：如果感兴趣，可以复制此错误，引用它的bug越多更有可能苹果会修复它：
BUG：15506447
状态：OpenProduct ：iOS
2013年11月19日03:53
摘要：为此设置UIBarButtonItem外观代理后退栏
按钮项目没有任何影响，直到第二次出现
按钮。
重现步骤：在appDelegate中，之前有任何东西出现了，加上
这些陈述：
UIImage * gradientImage44 = [[UIImage imageNamed：@navBar_44]
resizableImageWithCapInsets：UIEdgeInsetsMake（0,0 ，0,0）]; UIImage *
gradientImage32 = [[UIImage imageNamed：@navBar_32]
resizableImageWithCapInsets：UIEdgeInsetsMake（0,0,0,0）]; //设置
所有的背景图像UINavigationBars [[UINavigationBar
外观] setBackgroundImage：gradientImage44
forBarMetrics：UIBarMetricsDefault]; [[UINavigationBar外观]
setBackgroundImage：gradientImage32
forBarMetrics：UIBarMetricsLandscapePhone];
预期结果：首次推送viewController时，返回
按钮中有图像。
实际结果：第一次出现时，没有图像。再次推送
视图及其位置。实际上，当你第一次点击
按钮时它会出现，但是当按钮第一次出现时却不会出现。
版本：Xcode 5.0.1，iOS 7.0.3
注意：在导航
控制器的根视图控制器中添加它可以使它工作：
（void）viewDidLoad {
[super viewDidLoad];
self.title = @Recipe书; UIBarButtonItem * it = [[UIBarButtonItem alloc] initWithTitle：self.title
style：UIBarButtonItemStylePlain target：nil action：NULL]; UIImage *
btBack_30 = [[UIImage imageNamed：@btBack_30]
resizableImageWithCapInsets：UIEdgeInsetsMake（0,13,0,5）]; [它
setBackButtonBackgroundImage：btBack_30 forState：UIControlStateNormal
barMetrics：UIBarMetricsDefault];
self.navigationItem.backBarButtonItem = it; }
附加的演示项目显示问题。
配置：
附件：'DynamicsCatalog.zip'已成功上传。
编辑：我很高兴再说一遍，在bug记者中输入错误，有时会工作！
I saw an article a while back, which is here:
User Interface Customization in iOS 6
It shows customization for iOS 6. Since the article I have written Apps that use the technique, it is pretty straightforward, no magic in there.
However, I need to update one of my apps and under iOS 7 it does not work correctly. It appears that customization of UIBarButtonItems does not work the first time the view is presented. If I dismiss the view and then present it agin everything works fine. What is seen is shown here:
First time view is presented:
Second time:
I have seen this issue in his example, my code and a test app I wrote. The code is as follows:
// Customizing the Back Bar Buttons
UIImage * btBack_30 = [[UIImage imageNamed:@"btBack_30"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 13, 0, 5)];
UIImage * btBack_24 = [[UIImage imageNamed:@"btBack_24"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 12, 0, 5)];
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:btBack_30 forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:btBack_24 forState:UIControlStateNormal barMetrics:UIBarMetricsLandscapePhone];
As you can see there is no real magic, pretty standard, but I cannot find any reason or explanation why this does not work in iOS 7. The code gets executed in - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions.
I hope someone has seen this and can offer a solution. Thanks for any help!
** Note: it was proposed that this is not an apple bug, but by design. I am not saying it IS an apple issue, it could more likely be mine, but if you run either of the sample or copy and paste the code below it is apparent that the first time it does not work correctly and subsequent times it does. That would lead me to believe that the api calls are valid, but either they have a bug, or I am missing something that needs to be done.
**** UPDATE 4:**
I changed the code in MyAppDelegate's init method in my sample to the following based on the suggestion of FruityGeek, but still no luck:
- (instancetype)init
{
self = [super init];
if (self)
{
//Other UIAppearance proxy calls go here
[[UIBarButtonItem appearance] setTitleTextAttributes:
[NSDictionary dictionaryWithObjectsAndKeys:
//[UIColor colorWithRed:220.0/255.0 green:104.0/255.0 blue:1.0/255.0 alpha:1.0],
[UIColor colorWithRed:255.0/255.0 green:255.0/255.0 blue:255.0/255.0 alpha:1.0],
UITextAttributeTextColor,
//[UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:1.0],
[UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.8],
UITextAttributeTextShadowColor,
[NSValue valueWithUIOffset:UIOffsetMake(0.5, 0.5)],
UITextAttributeTextShadowOffset,
[UIFont systemFontOfSize:12.0],
UITextAttributeFont,
nil]
forState:UIControlStateNormal];
// Customizing the Back Bar Buttons
//ios6 uses whole button background image
UIImage * btBack_30 = [[UIImage imageNamed:@"btBack_30"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 13, 0, 5)];
UIImage * btBack_24 = [[UIImage imageNamed:@"btBack_24"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 12, 0, 5)];
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:btBack_30 forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:btBack_24 forState:UIControlStateNormal barMetrics:UIBarMetricsLandscapePhone];
if ([[UIDevice currentDevice].systemVersion integerValue] >= 7)
{
//ios7 needs additional chevron replacement image
UIImage * chevronReplacement = chevronReplacement = [btBack_30 imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
UIImage * chevronTransitionMaskReplacement = chevronTransitionMaskReplacement = [btBack_30 imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
[[UINavigationBar appearance] setBackIndicatorImage:chevronReplacement];
[[UINavigationBar appearance] setBackIndicatorTransitionMaskImage:chevronTransitionMaskReplacement];
}
}
return self;
}
**** UPDATE 3:**
I have added a dropbox link to a sample project. This is in addition to the already posted link above which is a simple app that also shows the issue. Both can be built and run in the simulator with iOS 6 and iOS 7. In the iOS 6 case everything works as expected. In iOS 7, if you click the table cell and present the next view the custom back button is not shown, if you go back and present it again the button is there.
I have been fooling with this for days, so I hope someone else sees it and can tell me what I am missing.
https://www.dropbox.com/s/oi1bh3emvtbmms0/NavigationBarDemo.zip
This may be silly, but could it have to do with my images? I will try the sample with different images and post an update.
- Tried with different images and that makes no difference, also used images from the above posted sample. It was a long shot, but since no one seems to have a better idea yet it was worth a try.
**** UPDATE 2:**
I have tried this in another test app and moved the code to the init meted of the app delegate and it still does not work. I have this posted here as well as the original authors site of the link at the top. Plus another forum, but no one seems to have a solution.
I am wondering if this could be an Apple bug?
**** UPDATE 1:**
Moved code from didFinishLaunchingWithOptions to willFinishLaunchingWithOptions and init and it still does not appear to work.
***** INIT METHOD FROM AppDelegate.m
- (id)init
{
// Create resizable images
UIImage *gradientImage44 = [[UIImage imageNamed:@"navBar_44"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)];
UIImage *gradientImage32 = [[UIImage imageNamed:@"navBar_32"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)];
// Set the background image for *all* UINavigationBars
[[UINavigationBar appearance] setBackgroundImage:gradientImage44 forBarMetrics:UIBarMetricsDefault];
[[UINavigationBar appearance] setBackgroundImage:gradientImage32 forBarMetrics:UIBarMetricsLandscapePhone];
// Customize the title text for *all* UINavigationBars
[[UINavigationBar appearance] setTitleTextAttributes:
[NSDictionary dictionaryWithObjectsAndKeys:
[UIColor colorWithRed:255.0/255.0 green:255.0/255.0 blue:255.0/255.0 alpha:1.0],
UITextAttributeTextColor,
[UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.8],
UITextAttributeTextShadowColor,
[NSValue valueWithUIOffset:UIOffsetMake(1, 1)],
UITextAttributeTextShadowOffset,
[UIFont boldSystemFontOfSize:18.0],
UITextAttributeFont,
nil]];
// Customizing the NavBar Buttons
UIImage * button30 = [[UIImage imageNamed:@"btButton_30"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 5, 0, 5)];
UIImage * button24 = [[UIImage imageNamed:@"btButton_24"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 5, 0, 5)];
[[UIBarButtonItem appearance] setBackgroundImage:button30 forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[[UIBarButtonItem appearance] setBackgroundImage:button24 forState:UIControlStateNormal barMetrics:UIBarMetricsLandscapePhone];
[[UIBarButtonItem appearance] setTintColor:[UIColor whiteColor]];
[[UIBarButtonItem appearance] setTitleTextAttributes:
[NSDictionary dictionaryWithObjectsAndKeys:
//[UIColor colorWithRed:220.0/255.0 green:104.0/255.0 blue:1.0/255.0 alpha:1.0],
[UIColor colorWithRed:255.0/255.0 green:255.0/255.0 blue:255.0/255.0 alpha:1.0],
UITextAttributeTextColor,
//[UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:1.0],
[UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.8],
UITextAttributeTextShadowColor,
[NSValue valueWithUIOffset:UIOffsetMake(0.5, 0.5)],
UITextAttributeTextShadowOffset,
[UIFont systemFontOfSize:12.0],
UITextAttributeFont,
nil]
forState:UIControlStateNormal];
// Customizing the Back Bar Buttons
UIImage * btBack_30 = [[UIImage imageNamed:@"btBack_30"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 13, 0, 5)];
UIImage * btBack_24 = [[UIImage imageNamed:@"btBack_24"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 12, 0, 5)];
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:btBack_30 forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:btBack_24 forState:UIControlStateNormal barMetrics:UIBarMetricsLandscapePhone];
return [super init];
}
It does look like an Apple bug, and you should enter a bug on it with bug reporter. That said, I can give you a relatively painless workaround: add this code to your RecipetTableViewController:
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = @"Recipe Book";
UIBarButtonItem *it = [[UIBarButtonItem alloc] initWithTitle:self.title style:UIBarButtonItemStylePlain target:nil action:NULL];
UIImage * btBack_30 = [[UIImage imageNamed:@"btBack_30"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 13, 0, 5)];
[it setBackButtonBackgroundImage:btBack_30 forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
self.navigationItem.backBarButtonItem = it;
}
EDIT: You can dup this bug if interested, the more bugs referencing it the more likely apple will fix it:
BUG: 15506447
State:OpenProduct:iOS
19-Nov-2013 03:53 PM
Summary: Setting the UIBarButtonItem appearance proxy for the back bar button item does not have any affect until the second appearance of the button.
Steps to Reproduce: In appDelegate, before anything has appeared, add these statements:
UIImage * gradientImage44 = [[UIImage imageNamed:@"navBar_44"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)]; UIImage * gradientImage32 = [[UIImage imageNamed:@"navBar_32"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)]; // Set the background image for all UINavigationBars [[UINavigationBar appearance] setBackgroundImage:gradientImage44 forBarMetrics:UIBarMetricsDefault]; [[UINavigationBar appearance] setBackgroundImage:gradientImage32 forBarMetrics:UIBarMetricsLandscapePhone];
Expected Results: When a viewController is first pushed, its back button has the image in it.
Actual Results: First time it appears, there is no image. Push the view again and its there. Actually it does appear when you click on the button the very first time, but not when the button first appears.
Version: Xcode 5.0.1, iOS 7.0.3
Notes: Adding this in the root view controller of the navigation controller makes it work:
(void)viewDidLoad { [super viewDidLoad];
self.title = @"Recipe Book"; UIBarButtonItem *it = [[UIBarButtonItem alloc] initWithTitle:self.title style:UIBarButtonItemStylePlain target:nil action:NULL]; UIImage * btBack_30 = [[UIImage imageNamed:@"btBack_30"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 13, 0, 5)]; [it setBackButtonBackgroundImage:btBack_30 forState:UIControlStateNormal barMetrics:UIBarMetricsDefault]; self.navigationItem.backBarButtonItem = it; }
Attached demo project shows the problem.
Configuration:
Attachments: 'DynamicsCatalog.zip' was successfully uploaded.
EDIT: I'm happy to say that again, entering bugs in bug reporter, does sometimes work!
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