如何iphone导航栏上添加背景图片？ [英] How to add background image on iphone Navigation bar?

问题描述

我要添加图像的背景下，我这样的导航栏：

什么是code？

感谢您

是不是？

  //设置自定义背景图片
*的UIImageView = backgroundView [[UIImageView的页头] initWithImage：[UIImage的imageNamed：@NavigationBackground.png]];
[self.navigationBar insertSubview：backgroundView atIndex：0];
[backgroundView发布]
 

解决方案

下面是从链接code @luvieere提及。
这code粘贴到到rootview控制器的正上方
@implementation RootViewController的

  @implementation UINavigationBar的（CustomImage）
 - （无效）的drawRect：（的CGRect）{RECT
    * UIImage的图像= [UIImage的imageNamed：@NavigationBar.png];
    [图像drawInRect：CGRectMake（0，0，self.frame.size.width，self.frame.size.height）];
}
@结束
 

随着iOS 5的，有做这个的官方途径。 （见<一href=\"http://developer.apple.com/library/ios/documentation/UIKit/Reference/UINavigationBar_Class/Reference/UINavigationBar.html#//apple_ref/occ/instm/UINavigationBar/setBackgroundImage%3aforBarMetrics%3a\">iOS开发人员库）

在这里创建的UINavigationController  //某处
如果（[navigationController.navigationBar respondsToSelector：@selector（了setBackgroundImage：forBarMetrics :)]）{
    * UIImage的图像= [UIImage的imageNamed：@NavigationBar.png];
    [导航栏了setBackgroundImage：图像forBarMetrics：UIBarMetricsDefault];
}
 

但尽管如此，保留旧code为向后兼容，除非你真的想在下面沟的iOS 4和。

I want to add an image background, to my navigation bar like this :

What is the code ?

Thank you

Is it right ?

//set custom background image
UIImageView *backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"NavigationBackground.png"]];
[self.navigationBar insertSubview:backgroundView atIndex:0];
[backgroundView release];

解决方案

Here's the code from the link @luvieere mentioned. Paste this code into to the rootview controller just above @implementation rootviewController

@implementation UINavigationBar (CustomImage)
- (void)drawRect:(CGRect)rect {
    UIImage *image = [UIImage imageNamed:@"NavigationBar.png"];
    [image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
}
@end

As of iOS 5, there is an official way to do this. (see iOS Developer Library)

// someplace where you create the UINavigationController
if ([navigationController.navigationBar respondsToSelector:@selector(setBackgroundImage:forBarMetrics:)] ) {
    UIImage *image = [UIImage imageNamed:@"NavigationBar.png"];
    [navigationBar setBackgroundImage:image forBarMetrics:UIBarMetricsDefault];
}

But still, retain the old code for backward compatibility unless you really want to ditch iOS 4 and below.

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