UISearchBar去掉背景

seachBar=[[UISearchBar alloc] init]; 

//修改搜索框背景 

seachBar.backgroundColor=[UIColor clearColor]; 

//去掉搜索框背景 

//1. 

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

//2. 

for (UIView *subview in seachBar.subviews) 

{  

if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground")]) 

{  

[subview removeFromSuperview];  

break;  

}  

} 

//3自定义背景 

UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"40-di.png"]]; 

    [mySearchBar insertSubview:imageView atIndex:1]; 

    [imageView release]; 

//4输入搜索文字时隐藏搜索按钮，清空时显示 

- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar {  

searchBar.showsScopeBar = YES;  

[searchBar sizeToFit];  

[searchBar setShowsCancelButton:YES animated:YES];  

return YES;  

}  

- (BOOL)searchBarShouldEndEditing:(UISearchBar *)searchBar {  

searchBar.showsScopeBar = NO;  

[searchBar sizeToFit];  

[searchBar setShowsCancelButton:NO animated:YES];  

return YES;  

}  

//改变搜索按钮文字 

//改变UISearchBar取消按钮字体 

for(id cc in [searchBar subviews]) 

    { 

if([cc isKindOfClass:[UIButton class]]) 

        { 

            UIButton *btn = (UIButton *)cc; 

            [btn setTitle:@"搜索"  forState:UIControlStateNormal]; 

        } 

    }