iOS UILabel 設置行高

UILabel *tileLabel = [[UILabel alloc] init];

    tileLabel.numberOfLines = 0;

    tileLabel.backgroundColor = [UIColor clearColor];

    tileLabel.text = @"調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭調整行間距云頭";

    tileLabel.font = [UIFont systemFontOfSize:11.0f];

    tileLabel.textColor = [Tools colorWithHex:0x787878];

    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:tileLabel.text];

    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];

    [paragraphStyle setLineSpacing:18];//調整行間距

    [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [tileLabel.text length])];

    tileLabel.attributedText = attributedString;

    NSDictionary *attributes = @{NSFontAttributeName:tileLabel.font, NSParagraphStyleAttributeName:paragraphStyle.copy};

    CGFloat height = [tileLabel.text boundingRectWithSize:CGSizeMake(self.view.width-32, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:attributes context:nil].size.height ;

//    CGFloat height =[self changeStationWidth:tileLabel.text anWidthTxtt:self.view.width-32 anfont:11];

    tileLabel.frame = CGRectMake(16, 0, self.view.width-32, height);

    [self.view addSubview:tileLabel];