CGContext ----生成图片--image

//获取图片

+ (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;

}