/php/Public/uploads/20140210/200*274_52f835c7c68cf.jpg

-(NSArray *)picSizeFromURL:(NSString *)url

{

    NSArray *mArr = [url componentsSeparatedByString:@"/"];

    NSString *nStr = [mArr lastObject];

    NSArray *nArr = [nStr componentsSeparatedByString:@"_"];

    NSString *sizeStr = [nArr firstObject];

    NSArray *sizeArr = [sizeStr componentsSeparatedByString:@"*"];

    return sizeArr;

}

/php/Public/uploads/20140210/200*274_52f835c7c68cf.jpg

原文：http://www.cnblogs.com/guligei/p/3542411.html