iphone - UILabel - 灵活大小和固定空间的问题

Question

我正在尝试查看有关 3 个不同标签的信息；第一的。标题二。发布日期三。说明

标题和发布日期之间有两个空行。有时当标题超过 3 行时，会在发布日期写上。这是一张图片(粗线是发布日期标签):

有时当描述标 checkout 现大量文本时，就会发生这种情况:

它应该是这样的:

所以问题: 1. 如何在标题和发布日期之间留一个固定的空格？ (无论标题是多少行，两者之间都会保留一个固定的空格) 2. 为什么文字多了说明会下移？我怎样才能固定他的位置？

我只想在 3 个标签之间留一个空格，不管每个标签有多少行。

到目前为止，这是我的代码:

- (void)viewDidLoad
{


    [super viewDidLoad];

    [_scroller setScrollEnabled:YES];
    [_scroller setContentSize:CGSizeMake(320, 600)];


    self.lblDescription.text = self.description;
    self.lblTitle.text = self.stitle;
    self.lblPubDate.text = self.pubDate;


    self.lblTitle.numberOfLines = 0;
    [self.lblTitle sizeToFit];
    self.lblTitle.textAlignment = UITextAlignmentRight;
    CGRect titleFram = self.lblTitle.frame;
    titleFram = CGRectMake(titleFram.origin.x, titleFram.origin.y, 280, titleFram.size.height);
    self.lblTitle.frame = titleFram;

    self.lblDescription.numberOfLines = 0;
    [self.lblDescription sizeToFit];

    [self resizeHeightToFitForLabel:self.lblTitle];
    [self resizeHeightToFitForLabel:self.lblDescription];


}
-(void)resizeHeightToFitForLabel:(UILabel *)label
{
    CGRect newFrame         = label.frame;
    newFrame.size.height    = [self heightForLabel:label withText:label.text];
    label.frame             = newFrame;
}

-(CGFloat)heightForLabel:(UILabel *)label withText:(NSString *)text
{
    CGSize maximumLabelSize     = CGSizeMake(290, FLT_MAX);

    CGSize expectedLabelSize    = [text sizeWithFont:label.font
                                   constrainedToSize:maximumLabelSize
                                       lineBreakMode:label.lineBreakMode];

    return expectedLabelSize.height;
}

完成这项工作的最佳方法是什么？谢谢..

Answer 1

你可以这样试试，

NSString *lbltext1 = lblTitle.text;
    NSString *lbltext2 = lblDate.text;
    NSString *lbltext3 = lblDesc.text;

CGRect rect = self.lblTitle.frame;
rect.size.height = [ViewController calculateHeightForText:lbltext1 font:self.lblTitle.font size:CGSizeMake(rect.size.width, 40000)].height;
self.lblTitle.frame = rect;

rect = self.lblDate.frame;
rect.origin.y = CGRectGetMaxY(self.lblTitle.frame) + 5;
rect.size.height = [ViewController calculateHeightForText:lbltext2 font:self.lblDate.font size:CGSizeMake(rect.size.width, 40000)].height;
self.lblDate.frame = rect;

rect = self.lblDesc.frame;
rect.origin.y = CGRectGetMaxY(self.lblDate.frame) + 5;
rect.size.height = [ViewController calculateHeightForText:lbltext3 font:self.lblDesc.font size:CGSizeMake(rect.size.width, 40000)].height;
self.lblDesc.frame = rect;

用于计算高度，

+ (CGSize)calculateHeightForText:(NSString *)text font:(UIFont *)font size:(CGSize)size {
    CGSize _size = [text sizeWithFont:font constrainedToSize:size lineBreakMode:UILineBreakModeWordWrap];
    return _size;
}