ios开发之lable根据文字自适应行高和换行

前言:开发中难免会遇到设置lable根据文字来调整高度和换行,具体做法如下.

sizethatfits方法

1. 设置lable的frame,numberofLines,字体等.

 UILabel *carTypeLN = [[UILabel alloc]init];
carTypeLN.frame = CGRectMake(margin+((margin+width)*lie), (row*(height+topMargin)), width,height);

2. 根据本身的view的frame,对lable的frame进行适配.
   carTypeLN.textAlignment = NSTextAlignmentCenter;
   carTypeLN.textColor = HEX_COLOR(kColor_Flag_GrayDark);
   carTypeLN.backgroundColor = HEX_COLOR(kColor_BG_white);
   carTypeLN.font = [UIFont systemFontOfSize:13];
   carTypeLN.text = types[i];
   CGSize size = [self sizeThatFits:CGSizeMake(carTypeLN.frame.size.height, MAXFLOAT)];
   CGRect frame = carTypeLN.frame;
   frame.size.height = size.height;
   [carTypeLN setFrame:frame];
   [self addSubview:carTypeLN];
   carTypeLN.numberOfLines = 0;

根据lable的文字以及font,对特定的宽度适配出符合该段文字的高度,该种方法比较灵活.

    CGSize labelSize = [self.contentLabel.text boundingRectWithSize:CGSizeMake([UIScreen mainScreen].bounds.size.width-130, 10000) options:NSStringDrawingUsesFontLeading|NSStringDrawingUsesDeviceMetrics|NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingTruncatesLastVisibleLine attributes:@{NSFontAttributeName:self.contentLabel.font} context:nil].size;