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1. // 1.设置导航栏背景  
2. UINavigationBar *bar = [UINavigationBar appearance];  
3. [bar setBackgroundImage:[UIImage resizeImage:@"NavigationBar_Background.png"] forBarMetrics:UIBarMetricsDefault];  
4. // 状态栏  
5. [UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleBlackOpaque;  
6.   
7. // 2.设置导航栏文字属性  
8. NSMutableDictionary *barAttrs = [NSMutableDictionary dictionary];  
9. [barAttrs setObject:[UIColor darkGrayColor] forKey:UITextAttributeTextColor];  
10. [barAttrs setObject:[NSValue valueWithUIOffset:UIOffsetMake(0, 0)] forKey:UITextAttributeTextShadowOffset];  
11. [bar setTitleTextAttributes:barAttrs];  
12.   
13. // 3.按钮  
14. UIBarButtonItem *item = [UIBarButtonItem appearance];  
15. [item setBackgroundImage:[UIImage resizeImage:@"BarButtonItem_Normal.png"] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];  
16. [item setBackgroundImage:[UIImage resizeImage:@"BarButtonItem_Pressed.png"] forState:UIControlStateHighlighted barMetrics:UIBarMetricsDefault];  
17.   
18. NSMutableDictionary *itemAttrs = [NSMutableDictionary dictionaryWithDictionary:barAttrs];  
19. [itemAttrs setObject:[UIFont boldSystemFontOfSize:13] forKey:UITextAttributeFont];  
20. [item setTitleTextAttributes:itemAttrs forState:UIControlStateNormal];  
21. [item setTitleTextAttributes:itemAttrs forState:UIControlStateHighlighted];  
22. [item setTitleTextAttributes:itemAttrs forState:UIControlStateDisabled];  
23.   
24. // 4.返回按钮  
25. [item setBackButtonBackgroundImage:[UIImage resizeImage:@"BarButtonItem_Back_Normal.png"] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];  
26. [item setBackButtonBackgroundImage:[UIImage resizeImage:@"BarButtonItem_Back_Pressed.png"] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];  

搞了半天，居然没有发现可以插入Objective-C代码的地方。真郁闷

1. //  
2. //  UIImage+Fit.m  
3. //  SinaWeibo  
4. //  
5. //  Created by mj on 13-8-19.  
6. //  Copyright (c) 2013年 itcast. All rights reserved.  
7. //  
8.   
9. #import "UIImage+Fit.h"  
10.   
11. @implementation UIImage (Fit)  
12.   
13. #pragma mark 返回拉伸好的图片  
14. + (UIImage *)resizeImage:(NSString *)imgName {  
15.     return [[UIImage imageNamed:imgName] resizeImage];  
16. }  
17.   
18. - (UIImage *)resizeImage  
19. {  
20.     CGFloat leftCap = self.size.width * 0.5f;  
21.     CGFloat topCap = self.size.height * 0.5f;  
22.     return [self stretchableImageWithLeftCapWidth:leftCap topCapHeight:topCap];  
23. }  
24.   
25. - (UIImage *)cut:(CGSize)sizeScale  
26. {  
27.     CGFloat width = self.size.width * sizeScale.width;  
28.     CGFloat height = self.size.height * sizeScale.height;  
29.     CGFloat x = (self.size.width -  width) * 0.5;  
30.     CGFloat y = (self.size.height - height) * 0.5;  
31.     CGRect rect = CGRectMake(x, y, width, height);  
32.     CGImageRef ref = CGImageCreateWithImageInRect(self.CGImage, rect);  
33.     return [UIImage imageWithCGImage:ref];  
34. }  
35.   
36. @end