对于json格式,我们并不陌生,但是因为它处于不同的语言标准也不一致。分享一下最近项目出现的json问题:
1、编码问题,在不清楚服务端的编码格式的情况下,我直接使用:
1
2
3
|
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:urlString]];
NSError *error = nil;
NSArray *arr = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
|
结果发现data是有数据的,但是arr是nil,找到error:The operation couldn't be completed. (Cocoa error 3840.)后来问了一下后台开发,因为存在中文,他采用了GBK编码,通过搜索uft8转gbk找到了答案:
1
2
3
4
5
6
|
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:urlString]];
NSError *error = nil;
NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
NSString *dataString = [[NSString alloc] initWithData:data encoding:enc];
NSData *utf8Data = [dataString dataUsingEncoding:NSUTF8StringEncoding];
NSArray *arr = [NSJSONSerialization JSONObjectWithData:utf8Data options:NSJSONReadingMutableContainers error:&error];
|
2、json非标准格式:(比如json数据存在\n \r \t 等制表符)阅读原文
1
2
3
4
5
6
7
8
9
10
11
|
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:urlString]];
NSError *error = nil;
NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
NSString *dataString = [[NSString alloc] initWithData:data encoding:enc];
//json数据当中没有 \n \r \t 等制表符,当后台给出有问题时,我们需要对json数据过滤
dataString = [dataString stringByReplacingOccurrencesOfString:@ "\r\n" withString:@ "" ];
dataString = [dataString stringByReplacingOccurrencesOfString:@ "\n" withString:@ "" ];
dataString = [dataString stringByReplacingOccurrencesOfString:@ "\t" withString:@ "" ];
NSData *utf8Data = [dataString dataUsingEncoding:NSUTF8StringEncoding];
NSArray *arr = [NSJSONSerialization JSONObjectWithData:utf8Data options:NSJSONReadingMutableContainers error:&error]; <span style= "font-family: Arial, Helvetica, sans-serif;" > </span>
|
感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!
原文链接:http://blog.csdn.net/u012390519/article/details/40620877