自定义 UINavigationBar 

 1 //CustomNavigationBar.h
 2 @interface UINavigationBar (UINavigationBarCategory)
 3 UIImageView *backgroundView;
 4 - (void)setBackgroundImage:(UIImage*)image;
 5 - (void)insertSubview:(UIView *)view atIndex:(NSInteger)index;
 6 @end
 7 //CustomNavigationBar.m
 8 @implementation UINavigationBar (UINavigationBarCategory)
 9 -(void)setBackgroundImage:(UIImage*)image
10 { if(image == nil)
11 { [backgroundView removeFromSuperview]; }
12 else { backgroundView = [[UIImageView alloc] initWithImage:image];
13     backgroundView.tag = 1;
14     backgroundView.frame = CGRectMake(0.f, 0.f, self.frame.size.width, self.frame.size.height);
15     backgroundView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; [self addSubview:backgroundView];
16     [self sendSubviewToBack:backgroundView];
17     [backgroundView release];
18 }
19 }
20 //for other views
21 - (void)insertSubview:(UIView *)view atIndex:(NSInteger)index
22 {
23     [super insertSubview:view atIndex:index];
24     [self sendSubviewToBack:backgroundView];
25 }
26 @end
27 //YourViewController.m
28 - (void)viewWillAppear:(BOOL)animated
29 {
30 [super viewWillAppear:animated];
31 [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"navigation_bar_bg.png"]];
32 }
33 Objective-c代码
34 //CustomNavigationBar.h
35 @interface UINavigationBar (UINavigationBarCategory)
36 UIImageView *backgroundView;
37 - (void)setBackgroundImage:(UIImage*)image;
38 - (void)insertSubview:(UIView *)view atIndex:(NSInteger)index;
39 @end
40 //CustomNavigationBar.m
41 @implementation UINavigationBar (UINavigationBarCategory)
42 -(void)setBackgroundImage:(UIImage*)image {
43     if(image == nil) {
44         [backgroundView removeFromSuperview];
45     } else {
46         backgroundView = [[UIImageView alloc] initWithImage:image];
47         backgroundView.tag = 1;
48         backgroundView.frame = CGRectMake(0.f, 0.f, self.frame.size.width, self.frame.size.height);
49         backgroundView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
50         [self addSubview:backgroundView];
51         [self sendSubviewToBack:backgroundView];
52         [backgroundView release];
53     }
54 }
55 //for other views
56 - (void)insertSubview:(UIView *)view atIndex:(NSInteger)index
57 {
58     [super insertSubview:view atIndex:index];
59     [self sendSubviewToBack:backgroundView];
60 }
61 @end
62 //YourViewController.m
63 - (void)viewWillAppear:(BOOL)animated
64 {
65 [super viewWillAppear:animated];
66 [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"navigation_bar_bg.png"]];
67 }

 

posted @ 2012-05-14 11:44  妙笔  阅读(369)  评论(0)    收藏  举报