#import 
    
     /** *  通过UIColor创建UIImage * *  @param color 颜色 * *  @return UIImage */+ (UIImage*)createImageWithColor:(UIColor *)color {    CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);    UIGraphicsBeginImageContext(rect.size);    CGContextRef context = UIGraphicsGetCurrentContext();    CGContextSetFillColorWithColor(context, [color CGColor]);    CGContextFillRect(context, rect);    UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();    UIGraphicsEndImageContext();    return theImage;}/** *  判断字符串是否为空 * *  @param thestring 字符串 * *  @return 是否为空 */+ (BOOL)isEmptyString:(NSString *)thestring {        if ( !thestring || thestring == nil || thestring == Nil) {        return YES;    }        if (thestring == nil)    {        return YES;    }    if (thestring == NULL)    {        return YES;    }    if ([thestring isKindOfClass:[NSNull class]])    {        return YES;    }    if ([thestring isEqual:[NSNull null]]) {        return YES;    }    if ([thestring isEqualToString:@"
     
      "]) {        return YES;    }    if ([thestring isEqualToString:@"(null)"]) {        return YES;    }    if ([[thestring stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] length]==0)    {        return YES;    }    return NO;}