Lable自適應高度方法的封裝

    ios7---Lable自適應高度封裝

    +(UILabel )getInfoLabel:(UILabel )label withText:(NSString )ktext withFont:(CGFloat )kfont withtosize:(CGRect)krect withBackGroundColor:(UIColor )kbackgroundColor

    {

        //內容顯示  高度自適應

        CGSize sizeToFit =[ktext sizeWithFont:[UIFont systemFontOfSize:kfont]constrainedToSize:CGSizeMake(krect.size.width,10000)lineBreakMode:NSLineBreakByWordWrapping];


    CGRect labelframe = CGRectMake(krect.origin.x,krect.origin.y,sizeToFit.width, sizeToFit.height);  
    label.frame=labelframe;  
    label.numberOfLines=0;  
    label.lineBreakMode=NSLineBreakByTruncatingTail;  
    label.font=[UIFont systemFontOfSize:kfont];  
    label.text = ktext;  
    label.backgroundColor=kbackgroundColor;  
    label.textAlignment = NSTextAlignmentLeft;  
    label.textColor = [UIColor blackColor];  
    return label;  
}  

ios8---Lable自適應高度封裝  

+(UILabel *)getInfoLabel:(UILabel *)label withText:(NSString *)ktext withFont:(UIFont *)kfont withtosize:(CGRect)krect withBackGroundColor:(UIColor *)kbackgroundColor  
{  
    label.numberOfLines =0;  
    UIFont * tfont =kfont;  
    label.font = tfont;  
    label.lineBreakMode =NSLineBreakByTruncatingTail ;  
    label.text =ktext;  
    //高度估計文本大概要顯示幾行，寬度根據需求自己定義。 MAXFLOAT 可以算出具體要多高  
    CGSize size =CGSizeMake(krect.size.width,10000);  
    NSDictionary * tdic = [NSDictionary dictionaryWithObjectsAndKeys:tfont,NSFontAttributeName,nil];  
    //ios7方法，獲取文本需要的size，限制寬度  
    CGSize  actualsize =[ktext boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin  attributes:tdic context:nil].size;  
    label.frame=CGRectMake(krect.origin.x,krect.origin.y,actualsize.width, actualsize.height);  
    label.backgroundColor=kbackgroundColor;  
    return label;  
}  </pre>