-(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;
}