NSArray倒序 NSArray *tmparr = [[upLoadImageArr reverseObjectEnumerator] allObjects];
ios 正则表达式替换 . 不可变字符串 (content 是不可变)
NSRegularExpression *regularExpression = [NSRegularExpression regularExpressionWithPattern:
@"<(/{0,})div(.{0,})>" options: error:nil];
content = [regularExpression stringByReplacingMatchesInString:content options: range:NSMakeRange(, content.length) withTemplate:@""]; . 可变字符串 (content 是可变)
[regularExpression replaceMatchesInString:content options: range:NSMakeRange(, content.length) withTemplate:@""];