向 UILabel 添加空间/填充 [英] Adding space/padding to a UILabel

问题描述

我有一个 UILabel，我想在顶部和底部添加空间.使用约束中的最小高度，我已将其修改为:

I have a UILabel where I want to add space in the top and in the bottom. With the minimum height in constraints, I've modified it to:

为此我使用了:

override func drawTextInRect(rect: CGRect) {
    var insets: UIEdgeInsets = UIEdgeInsets(top: 0.0, left: 10.0, bottom: 0.0, right: 10.0)
    super.drawTextInRect(UIEdgeInsetsInsetRect(rect, insets))
}

但我必须找到不同的方法，因为如果我写了两行以上，问题是一样的:

But I've to find a different method because if I write more than two lines, the problem is the same:

推荐答案

如果你想坚持使用 UILabel，而不是继承它，Mundi 为您提供了明确的解决方案.

If you want to stick with UILabel, without subclassing it, Mundi has given you a clear solution.

如果您愿意避免使用 UIView 包装 UILabel，则可以使用 UITextView 来启用 UIEdgeInsets(填充)或子类 UILabel 以支持 UIEdgeInsets.

If alternatively, you would be willing to avoid wrapping the UILabel with a UIView, you could use UITextView to enable the use of UIEdgeInsets (padding) or subclass UILabel to support UIEdgeInsets.

使用 UITextView 只需要提供插图 (Objective-C):

Using a UITextView would only need to provide the insets (Objective-C):

textView.textContainerInset = UIEdgeInsetsMake(10, 0, 10, 0);

替代方案，如果您子类化 UILabel，则此方法的示例将覆盖 drawTextInRect 方法
(目标-C)

Alternative, if you subclass UILabel, an example to this approach would be overriding the drawTextInRect method
(Objective-C)

- (void)drawTextInRect:(CGRect)uiLabelRect {
    UIEdgeInsets myLabelInsets = {10, 0, 10, 0};
    [super drawTextInRect:UIEdgeInsetsInsetRect(uiLabelRect, myLabelInsets)];
}

您还可以为新的子类 UILabel 提供 TOP、LEFT、BOTTOM 和 RIGHT 的插入变量.

You could additionally provide your new subclassed UILabel with insets variables for TOP, LEFT, BOTTOM and RIGHT.

示例代码可以是:

在 .h (Objective-C)

float topInset, leftInset,bottomInset, rightInset;

在 .m (Objective-C)

- (void)drawTextInRect:(CGRect)uiLabelRect {
    [super drawTextInRect:UIEdgeInsetsInsetRect(uiLabelRect, UIEdgeInsetsMake(topInset,leftInset,bottomInset,rightInset))];
}

据我所知，在子类化 UILabel 时，您似乎必须覆盖其内在内容大小.

From what I have seen, it seems you have to override the intrinsicContentSize of the UILabel when subclassing it.

所以你应该像这样覆盖intrinsicContentSize:

So you should override intrinsicContentSize like:

- (CGSize) intrinsicContentSize {
    CGSize intrinsicSuperViewContentSize = [super intrinsicContentSize] ;
    intrinsicSuperViewContentSize.height += topInset + bottomInset ;
    intrinsicSuperViewContentSize.width += leftInset + rightInset ;
    return intrinsicSuperViewContentSize ;
}

并添加以下方法来编辑您的插图，而不是单独编辑它们:

And add the following method to edit your insets, instead of editing them individually:

- (void) setContentEdgeInsets:(UIEdgeInsets)edgeInsets {
    topInset = edgeInsets.top;
    leftInset = edgeInsets.left;
    rightInset = edgeInsets.right;
    bottomInset = edgeInsets.bottom;
    [self invalidateIntrinsicContentSize] ;
}

它将更新 UILabel 的大小以匹配边缘插入并涵盖您提到的多行必要性.

It will update the size of your UILabel to match the edge insets and cover the multiline necessity you referred to.

经过一番搜索后，我发现了这个带有 IPInsetLabel 的 Gist.如果这些解决方案都不起作用，您可以尝试一下.

After searching a bit I have found this Gist with an IPInsetLabel. If none of those solutions work you could try it out.

关于这个问题有一个类似的问题(重复).
有关可用解决方案的完整列表，请参阅此答案:UILabel text margin

There was a similar question (duplicate) about this matter.
For a full list of available solutions, see this answer: UILabel text margin

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