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iPhone开发中为UINavigationBar设置背景图片方法是本文要介绍的内容，在iPhone开发中, 有时候我们想给导航条添加背景图片, 实现多样化的导航条效果, 用其他方法往往无法达到理想的效果, 经过网上搜索及多次实验, 确定如下最佳实现方案。

为UINavigatonBar增加如下Category:

@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

例如, 在我的项目中, 添加如下代码:

/* input: The image and a tag to later identify the view */
@implementation UINavigationBar (CustomImage)
- (void)drawRect:(CGRect)rect {
    UIImage *image = [UIImage imageNamed: @"title_bg.png"];
    [image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
}
@end

@implementation FriendsPageViewController
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    self.navigationBar.tintColor = [UIColor purpleColor];

    [self initWithRootViewController:[[RegPageViewController alloc] init]];
    [super viewDidLoad];
}

实现的效果如下图:

小结：iPhone开发中为UINavigationBar设置背景图片方法的内容介绍完了，希望通过本文的学习能对你有所帮助！