iOS 通过设置颜色去除UISearchBar的灰色背景

实现效果前：



实现效果后：



实现代码如下：

@property (weak,
nonatomic) IBOutlet
UISearchBar *searchbar;

通过UIImage* searchBarBg;调用下面的代码

UIImage* searchBarBg = [self GetImageWithColor:[UIColor
clearColor]
andHeight:32.0f];

[self.searchbar
setBackgroundImage:searchBarBg];

#pragma mark 实现搜索条背景透明化

- (UIImage*) GetImageWithColor:(UIColor*)color andHeight:(CGFloat)height{

    CGRect r=
CGRectMake(0.0f,
0.0f, 1.0f, height);

    UIGraphicsBeginImageContext(r.size);

    CGContextRef context =
UIGraphicsGetCurrentContext();

    CGContextSetFillColorWithColor(context, [color
CGColor]);

    CGContextFillRect(context, r);

    UIImage *img =
UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return img;

}
通过这些便实现了去除UISearchBar的灰色背景