IOS UISearchBar 去掉背景颜色

_searchBar.backgroundImage = [self imageWithColor:[UIColor clearColor] size:_searchBar.bounds.size];

/** 取消searchBar背景色*/

- (UIImage *)imageWithColor:(UIColor *)color size:(CGSize)size

{

CGRect rect= CGRectMake(0,0, size.width, size.height);

UIGraphicsBeginImageContext(rect.size);

CGContextRef context=UIGraphicsGetCurrentContext();

CGContextSetFillColorWithColor(context, [color CGColor]);

CGContextFillRect(context, rect);

UIImage*image =UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();returnimage;

}