关于UILabel自适应宽度高度

label自适应宽度

CGSize labelSize=[label.text                     sizeWithAttributes:@{NSFontAttributeName: [UIFont    systemFontOfSize:fontOfLab]}];

label.font = [UIFont systemFontOfSize:fontOfLab];

label 自适应高度

CGSize labelSize = [self.lab.text sizeWithFont:self.lab.font constrainedToSize:size lineBreakMode:NSLineBreakByClipping];

这种方法虽然能够用  可是官网已经建议咱们使用下面那种来代替了 哎  如今才发现

//自动折行设置

     label.lineBreakMode =  UILineBreakModeWordWrap ;

     label.numberOfLines = 0;

     

     //自适应高度

     CGRect txtFrame = label.frame;

     

     label.frame = CGRectMake(10, 100, 300,

                              txtFrame.size.height =[label.text boundingRectWithSize:

                                                     CGSizeMake(txtFrame.size.width, CGFLOAT_MAX)

                                                                             options: NSStringDrawingUsesLineFragmentOrigin  |  NSStringDrawingUsesFontLeading

                                                                          attributes:[ NSDictionary  dictionaryWithObjectsAndKeys:label.font, NSFontAttributeName ,  nil ] context: nil ].size.height);

     label.frame = CGRectMake(10, 100, 300, txtFrame.size.height);

     

     [ self .view addSubview:label];