unicode 转换成中文
+ (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:@" "];
}