在iOS 7中设置导航栏图像

Question

我想将我当前的项目从iOS 6转换为iOS 7.在iOS 6中我的项目工作正常，但在iOS 7中导航栏图像显示不正常。

我在iOS 6中使用了这段代码片段，

UIImage *imgNav = [UIImage imageNamed:@"navigation.png"];
self.navigationController.navigationBar.frame = CGRectMake(0, 0, 320, 44);
[self.navigationController.navigationBar setBackgroundImage:imgNav forBarMetrics:
     UIBarMetricsDefault];

如何在iOS 7中设置导航栏图像？

Answer 1

尝试在AppDelegate中添加以下代码

[[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"navigation.png"] 
                                   forBarMetrics:UIBarMetricsDefault];

这是Swift版本：

UINavigationBar.appearance().setBackgroundImage(UIImage.init(named: "navigation.png"), forBarMetrics: UIBarMetrics.Default)

Swift 3版本：

UINavigationBar.appearance().setBackgroundImage(UIImage.init(named: "logo-dark.png"), for: UIBarMetrics.default)

Answer 2

对于iOS 7：

[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"navbar.png"] forBarMetrics:UIBarMetricsDefault];

Answer 3

使用此简单语法更改Navigation Background简单方法。

self.navigationController.navigationBar.barTintColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"YourImage.png"]];
self.navigationController.navigationBar.titleTextAttributes = @{NSForegroundColorAttributeName: [UIColor whiteColor]};

Answer 4

if ([self.navigationController.navigationBar respondsToSelector:@selector(setBackgroundImage:forBarMetrics:)] )
{

    UIImage *image = [UIImage imageNamed:@"navigation.png"];
    [self.navigationController.navigationBar setBackgroundImage:image forBarMetrics:UIBarMetricsDefault];
}

Answer 5

故事板方式：

1. 将图像视图拖到故事板场景的底栏。
2. 从场景列表左侧的导航项控制拖动到新创建的图像视图。
3. 单击图像视图，然后在属性中设置图像。

Answer 6

[[UINavigationBar appearance] setBackgroundImage：[UIImage imageNamed：@“navigation.png”] forBarMetrics：UIBarMetricsDefault];

如果您遵循ios7指南中提到的规则，它的工作原理如下：•如果您想要一个没有渐变的纯色，请创建1 x 1点图像。 •如果需要垂直渐变，请创建宽度为1磅且高度与UI元素背景高度匹配的图像。 •如果要提供重复纹理外观，则需要创建尺寸与纹理重复部分的尺寸相匹配的图像。 •如果要提供非重复纹理外观，则需要创建尺寸与UI元素背景区域尺寸相匹配的静态图像。

欲了解更多信息，请点击链接：
https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/ResizableImages.html#//apple_ref/doc/uid/TP40006556-CH30-SW1

Answer 7

就这样做..

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // This will set the backGround image for all the Navigation Bars

    [[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"navigationBar"] forBarMetrics:UIBarMetricsDefault];



    return YES;
}

Answer 8

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{


    [[UINavigationBar appearance] setTitleTextAttributes: @{
                                                            UITextAttributeTextColor: [UIColor whiteColor],
                                                            UITextAttributeTextShadowColor: [UIColor clearColor],
                                                            UITextAttributeTextShadowOffset: [NSValue valueWithUIOffset:UIOffsetMake(0.0f, 1.0f)],
                                                            UITextAttributeFont: [UIFont fontWithName:@"AppleGothic" size:20.0f]
                                                            }];

 if([[[UIDevice currentDevice] systemVersion] floatValue] < 7.0)
    {


        [[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"navigatio_for_ios6"] forBarMetrics:UIBarMetricsDefault];

        [[UINavigationBar appearance] setTitleVerticalPositionAdjustment:0.0 forBarMetrics:UIBarMetricsDefault];
    }
else
    {
        [[UINavigationBar appearance] setBarTintColor:UIColorFromRGB(0x067AB5)];

        // Uncomment to change the color of back button
        [[UINavigationBar appearance] setTintColor:[UIColor whiteColor]];

        // Uncomment to assign a custom backgroung image
        [[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"navigon_bg_ios7.png"] forBarMetrics:UIBarMetricsDefault];

        // Uncomment to change the back indicator image

        [[UINavigationBar appearance] setBackgroundColor:[UIColor whiteColor]];
        [[UINavigationBar appearance] setBackIndicatorTransitionMaskImage:[UIImage imageNamed:@""]];

        // Uncomment to change the font style of the title

        NSShadow *shadow = [[NSShadow alloc] init];
        shadow.shadowColor = [UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.8];
        shadow.shadowOffset = CGSizeMake(0, 1);

        [[UINavigationBar appearance] setTitleTextAttributes: [NSDictionary dictionaryWithObjectsAndKeys:[UIColor colorWithRed:245.0/255.0 green:245.0/255.0 blue:245.0/255.0 alpha:1.0], NSForegroundColorAttributeName,shadow, NSShadowAttributeName,[UIFont fontWithName:@"HelveticaNeue-Bold" size:18.0], NSFontAttributeName, nil]];


        [[UINavigationBar appearance] setTitleVerticalPositionAdjustment:0.0 forBarMetrics:UIBarMetricsDefault];
    }



}

Answer 9

在appDelegate类中试用这段代码它会对你有所帮助。

[[UINavigationBar appearance] setBackgroundImage:[[UIImage imageNamed:@"navbarimg.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)] forBarMetrics:UIBarMetricsDefault];