IOS 设置导航栏全局样式

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. // 2.设置导航栏文字属性
7. NSMutableDictionary *barAttrs = [NSMutableDictionary dictionary];
8. [barAttrs setObject:[UIColor darkGrayColor] forKey:UITextAttributeTextColor];
9. [barAttrs setObject:[NSValue valueWithUIOffset:UIOffsetMake(0, 0)] forKey:UITextAttributeTextShadowOffset];
10. [bar setTitleTextAttributes:barAttrs];
11. // 3.按钮
12. UIBarButtonItem *item = [UIBarButtonItem appearance];
13. [item setBackgroundImage:[UIImage resizeImage:@"BarButtonItem_Normal.png"] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
14. [item setBackgroundImage:[UIImage resizeImage:@"BarButtonItem_Pressed.png"] forState:UIControlStateHighlighted barMetrics:UIBarMetricsDefault];
15. NSMutableDictionary *itemAttrs = [NSMutableDictionary dictionaryWithDictionary:barAttrs];
16. [itemAttrs setObject:[UIFont boldSystemFontOfSize:13] forKey:UITextAttributeFont];
17. [item setTitleTextAttributes:itemAttrs forState:UIControlStateNormal];
18. [item setTitleTextAttributes:itemAttrs forState:UIControlStateHighlighted];
19. [item setTitleTextAttributes:itemAttrs forState:UIControlStateDisabled];
20. // 4.返回按钮
21. [item setBackButtonBackgroundImage:[UIImage resizeImage:@"BarButtonItem_Back_Normal.png"] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
22. [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. #import "UIImage+Fit.h"
9. @implementation UIImage (Fit)
10. #pragma mark 返回拉伸好的图片
11. + (UIImage *)resizeImage:(NSString *)imgName {
12. return [[UIImage imageNamed:imgName] resizeImage];
13. }
14. - (UIImage *)resizeImage
15. {
16. CGFloat leftCap = self.size.width * 0.5f;
17. CGFloat topCap = self.size.height * 0.5f;
18. return [self stretchableImageWithLeftCapWidth:leftCap topCapHeight:topCap];
19. }
20. - (UIImage *)cut:(CGSize)sizeScale
21. {
22. CGFloat width = self.size.width * sizeScale.width;
23. CGFloat height = self.size.height * sizeScale.height;
24. CGFloat x = (self.size.width -  width) * 0.5;
25. CGFloat y = (self.size.height - height) * 0.5;
26. CGRect rect = CGRectMake(x, y, width, height);
27. CGImageRef ref = CGImageCreateWithImageInRect(self.CGImage, rect);
28. return [UIImage imageWithCGImage:ref];
29. }
30. @end