ios之UILabel实现文本自适应方法

- (void)initUserInterface{ UILabel *label = [[UILabel alloc]init]; label.numberOfLines = 0; // 需要把显示行数设置成无限制 label.font = [UIFont systemFontOfSize:15]; label.textAlignment = NSTextAlignmentCenter; label.text = @"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"; CGSize size = [self sizeWithString:label.text font:label.font]; label.bounds = CGRectMake(0, 0, size.width, size.height); label.center = self.view.center; [self.view addSubview:label]; }// 定义成方法方便多个label调用 增加代码的复用性- (CGSize)sizeWithString:(NSString *)string font:(UIFont *)font{ CGRect rect = [string boundingRectWithSize:CGSizeMake(320, 8000)//限制最大的宽度和高度 options:NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesFontLeading |NSStringDrawingUsesLineFragmentOrigin//采用换行模式 attributes:@{NSFontAttributeName: font}//传人的字体字典 context:nil]; return rect.size;}