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:
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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:
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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
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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