自动适配文字高度

- (UILabel *)titleL{

if(_titleL ==nil){

_titleL = [[UILabel alloc] init];

/**设置文字*/
        [_titleL setText:self.myMessModel.content];
        [_titleL setTextAlignment:NSTextAlignmentLeft];

//文字颜色
        [_titleL setTextColor:[self.Skin getCellTitleColor]];
          _titleL.numberOfLines = 0; //多行

//设置格式
        NSStringDrawingOptions options =  NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading;
        [_titleL setFont:[self.Skin getDefaultTextFont]];

//SCREEN_SIZE.width 屏幕的宽度   WJ_HOME_LEFT_RIGHT_GAP间隙  MAXFLOAT 最大高度
        CGRect contentRect = [_titleL.text boundingRectWithSize:CGSizeMake(SCREEN_SIZE.width - 2*WJ_HOME_LEFT_RIGHT_GAP, MAXFLOAT) options:options attributes:@{NSFontAttributeName:         [self.Skin getDefaultTextFont]} context:nil];
        [_titleL setFrame:CGRectMake(WJ_HOME_LEFT_RIGHT_GAP, CGRectGetMaxY(self.timeL.frame), contentRect.size.width, contentRect.size.height)];

}

return _titleL;

}