小编Nas*_*ser的帖子

当我尝试将utf-8字符串转换为NSString时,如下所示:

NSString *s = [NSString stringWithUTF8String:"\U0627\U0644\U0641\U0631\U0646"];
NSLog(@"%@", s);

我得到编译错误:

incomplete universal character name

请注意,它有时正常工作:

NSString *UAE = [NSString stringWithUTF8String:"\U0627\U0644\U0641\U0631\U0646"];
    NSLog(@"%@", UAE);

和输出:

????????

那为什么会这样呢？请帮忙.