【IOS】UISearchBar背景透明,去掉背景,自定义背景

浏览数：35 / 时间：2015年06月11日

ios6,ios7,ios7.1下设置UISearchbar的背景色

ios系统升级到7.1后，原来在7.0下显示正常的UISearchbar现在又出现问题了。究其原因，是由于UISearchbar的subview又做修改了。

 1 //修改searchBar样式
 2 
 3 - (void)changeSearchBar {
 4 
 5     float version = [[[UIDevice currentDevice] systemVersion] floatValue];
 6 
 7     if ([_searchBar respondsToSelector:@selector(barTintColor)]) {
 8 
 9         float iosversion7_1 = 7.1;
10 
11         if (version >= iosversion7_1)        {
12 
13             //iOS7.1
14 
15             [[[[_searchBar.subviews objectAtIndex:0] subviews] objectAtIndex:0] removeFromSuperview];
16 
17             [_searchBar setBackgroundColor:[UIColor clearColor]];
18 
19         }
20 
21         else {            //iOS7.0
22 
23             [_searchBar setBarTintColor:[UIColor clearColor]];
24 
25             [_searchBar setBackgroundColor:[UIColor clearColor]];
26 
27         }
28 
29     }
30 
31     else {
32 
33         //iOS7.0以下
34 
35         [[_searchBar.subviews objectAtIndex:0] removeFromSuperview];
36 
37 //        [_searchBar setBackgroundColor:[UIColor clearColor]];
38 
39         [_searchBar setBackgroundColor:[UIColor colorWithPatternImage:[UIImageimageNamed:@"searchBarBg.png"]]];
40 
41     }}

//一行代码搞定去掉去掉背景

[[searchbar.subviews objectAtIndex:0]removeFromSuperview];

----------------------------------------------------------------------

注意：

去掉搜索控件的背景之后在下方会出现一条黑线，我们要把那条黑线去除

1 CGRect rect = self.searchBar.frame;
2 UIView *lineView = [[UIView alloc]initWithFrame:CGRectMake(0, rect.size.height-2,rect.size.width, 2)];
3 lineView.backgroundColor = [UIColor whiteColor];
4 [self.searchBar addSubview:lineView];

 1 /*UISearchBar背景透明,去掉背景,自定义背景*/
 2 
 3 seachBar=[[UISearchBar alloc] init];
 4 
 5  
 6 
 7 //修改搜索框背景
 8 
 9 seachBar.backgroundColor=[UIColor clearColor];
10 
11 //去掉搜索框背景
12 
13 //1.
14 
15 [[searchbar.subviews objectAtIndex:0]removeFromSuperview];
16 
17 //2.
18 
19 for (UIView *subview in seachBar.subviews) 
20 
21 {  
22 
23 if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground")])
24 
25 {  
26 
27 [subview removeFromSuperview];  
28 
29 break;  
30 
31 }  
32 
33 } 
34 
35 //3自定义背景
36 
37 UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"40-di.png"]];
38 
39     [mySearchBar insertSubview:imageView atIndex:1];
40 
41     [imageView release];
42 
43 //4输入搜索文字时隐藏搜索按钮，清空时显示
44 
45 - (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar {  
46 
47 searchBar.showsScopeBar = YES;  
48 
49 [searchBar sizeToFit];  
50 
51 [searchBar setShowsCancelButton:YES animated:YES];  
52 
53 return YES;  
54 
55 }  
56 
57 - (BOOL)searchBarShouldEndEditing:(UISearchBar *)searchBar {  
58 
59 searchBar.showsScopeBar = NO;  
60 
61 [searchBar sizeToFit];  
62 
63 [searchBar setShowsCancelButton:NO animated:YES];  
64 
65 return YES;  
66 
67 }  
68 
69 //改变搜索按钮文字
70 
71 //改变UISearchBar取消按钮字体
72 
73 for(id cc in [searchBar subviews])
74 
75     {
76 
77 if([cc isKindOfClass:[UIButton class]])
78 
79         {
80 
81             UIButton *btn = (UIButton *)cc;
82 
83             [btn setTitle:@"搜索"  forState:UIControlStateNormal];
84 
85         }
86 
87 }