//对就这么简单 \n NSMutableAttributedString 就可以搞的定    NSString * string =@"你要放在label里的文本字符串\n换行符本字符串本字符串本字符串本字符串本字符串本字符串";    NSMutableAttributedString *attrString =    [[NSMutableAttributedString alloc] initWithString:string];        UILabel *label = [UILabel newAutoLayoutView];    [label autoSetDimension:ALDimensionWidth toSize:300];    label.numberOfLines = 0;    [self.view addSubview:label];    [label autoCenterInSuperview];    label.attributedText =attrString;    label.textAlignment =NSTextAlignmentCenter;