UILabel *noticeLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 200, 100)];
noticeLabel.numberOfLines = 0; // 系统默认为1,不加这行不能换行,不换行你就看不出效果
NSString *str1 = @"扫描二维码\n关注中国政府网";
noticeLabel.attributedText = [self attributedStringOfTitleLabel:str1 withFont:[UIFont systemFontSize]];
noticeLabel.textAlignment = NSTextAlignmentCenter;
[self.view addSubview:noticeLabel];
- (NSMutableAttributedString *)attributedStringOfTitleLabel:(NSString *)text withFont:(UIFont *)font{
NSDictionary *attributeDictionary = @{NSKernAttributeName : @(-1.0),NSFontAttributeName:font}; // NSKernAttributeName : @(-1.0) :字间距缩进
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:text attributes:attributeDictionary];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
//调整行间距
paragraphStyle.maximumLineHeight = FontHeightTitle(46);
paragraphStyle.minimumLineHeight = FontHeightTitle(46);
[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [text length])];
return attributedString;
}
