iOS \U7ea2 乱码 转换

通常网络请求的数据，如果不做处理在输出时显示是 \U 之类的编码的；

不需要导入别的类库解决方法

- (NSString *)replaceUnicode:(NSString *)unicodeStr {

    NSString *tempStr1 = [unicodeStr stringByReplacingOccurrencesOfString:@"\\u" withString:@"\\U"];
    NSString *tempStr2 = [tempStr1 stringByReplacingOccurrencesOfString:@"\"" withString:@"\\\""];
    NSString *tempStr3 = [[@"\"" stringByAppendingString:tempStr2] stringByAppendingString:@"\""];
    NSData *tempData = [tempStr3 dataUsingEncoding:NSUTF8StringEncoding];
    NSString* returnStr = [NSPropertyListSerialization propertyListFromData:tempData
                                                           mutabilityOption:NSPropertyListImmutable
                                                                     format:NULL
                                                           errorDescription:NULL];

    return [returnStr stringByReplacingOccurrencesOfString:@"\\r\\n" withString:@"\n"];
}