blocks|key|469744|text|使用[label+sizeToFit];将获得与Daniels+Category相同的结果。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|469745|虽然我推荐使用autolayout，让标签根据约束来调整自己的大小。|469746|entityMap^0|2|I|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|N|8|@]|D|@]|E|$]]]|I|$]]

Using <code>[label sizeToFit];</code> will achieve the same result from Daniels Category.

Although I recommend to use autolayout and let the label resize itself based on constraints.

blocks|key|469750|text|在UILabel中使用[label+sizeToFit];调整文本|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|469751|entityMap^0|B|I|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Use <code>[label sizeToFit];</code> to adjust the text in UILabel

blocks|key|469896|text|以下是我发现的适合我的情况：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|469897|1)+UILabel的高度具有使用自动布局的>=+0约束。宽度是固定的。2)将文本分配到UILabel中，此时它已经有了一个superview+(不确定这有多重要)。3)然后，做：|469898|++++label.sizeToFit()
++++label.layoutIfNeeded()|code-block|syntax|javascript|469899|标签的高度现在已正确设置。|469900|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Here's what I am finding works for my situation:

1) The height of the UILabel has a >= 0 constraint using autolayout. The width is fixed.
2) Assign the text into the UILabel, which already has a superview at that point (not sure how vital that is).
3) Then, do:

<pre><code> label.sizeToFit()
 label.layoutIfNeeded()
</code></pre>

The height of the label is now set appropriately.

blocks|key|469708|text|我根据Daniel上面的回复创建了一些方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|469709|-(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;
}

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

-(void)resizeHeightToFitForLabel:(UILabel+*)label+withText:(NSString+*)text
{
++++label.text++++++++++++++=+text;
++++[self+resizeHeightToFitForLabel:label];
}|code-block|syntax|javascript|469710|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I created some methods based Daniel's reply above. 

<pre><code>-(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;
}

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

-(void)resizeHeightToFitForLabel:(UILabel *)label withText:(NSString *)text
{
 label.text = text;
 [self resizeHeightToFitForLabel:label];
}
</code></pre>

blocks|key|685669|text|@implementation+UILabel+(UILabel_Auto)

-+(void)adjustHeight+{

++++if+(self.text+==+nil)+{
++++++++self.frame+=+CGRectMake(self.frame.origin.x,+self.frame.origin.y,+self.bounds.size.width,+0);
++++++++return;
++++}

++++CGSize+aSize+=+self.bounds.size;
++++CGSize+tmpSize+=+CGRectInfinite.size;
++++tmpSize.width+=+aSize.width;

++++tmpSize+=+[self.text+sizeWithFont:self.font+constrainedToSize:tmpSize];

++++self.frame+=+CGRectMake(self.frame.origin.x,+self.frame.origin.y,+aSize.width,+tmpSize.height);
}

@end|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|685670|这是一个类别方法。必须先设置文本，然后调用此方法来调整UILabel的高度。|unstyled|685671|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>@implementation UILabel (UILabel_Auto)

- (void)adjustHeight {

 if (self.text == nil) {
 self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, self.bounds.size.width, 0);
 return;
 }

 CGSize aSize = self.bounds.size;
 CGSize tmpSize = CGRectInfinite.size;
 tmpSize.width = aSize.width;

 tmpSize = [self.text sizeWithFont:self.font constrainedToSize:tmpSize];

 self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, aSize.width, tmpSize.height);
}

@end
</code></pre>

This is category method. You must set text first, than call this method to adjust UILabel's height.

blocks|key|685875|text|每次都适合！:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|685876|++++name.text+=+@"Hi+this+the+text+I+want+to+fit+to"
++++UIFont+*+font+=+14.0f;
++++CGSize+size+=+[name.text+sizeWithAttributes:@{NSFontAttributeName:+font}];
++++nameOfAssessment.frame+=+CGRectMake(400,+0,+size.width,+44);
++++nameOfAssessment.font+=+[UIFont+systemFontOfSize:font];|code-block|syntax|javascript|685877|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Fits everytime! :)

<pre><code> name.text = @"Hi this the text I want to fit to"
 UIFont * font = 14.0f;
 CGSize size = [name.text sizeWithAttributes:@{NSFontAttributeName: font}];
 nameOfAssessment.frame = CGRectMake(400, 0, size.width, 44);
 nameOfAssessment.font = [UIFont systemFontOfSize:font];
</code></pre>

blocks|key|469968|text|sizeToFit()方法不能很好地处理约束，但是在iOS+9中，这就是您所需要的-|type|unstyled|depth|inlineStyleRanges|entityRanges|data|469969|label.widthAnchor.constraint(equalToConstant:+label.intrinsicContentSize.width).activate()|code-block|syntax|javascript|469970|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

the sizeToFit() method doesn't play well with constraints, but as of iOS 9 this is all you need -
<pre><code>label.widthAnchor.constraint(equalToConstant: label.intrinsicContentSize.width).activate()
</code></pre>

blocks|key|685827|text|还有一种方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|685828|[self.myLabel+changeTextWithAutoHeight:self.myStringToAssignToLabel+width:180.0f];|code-block|syntax|javascript|685829|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

There's also this approach:

<pre><code>[self.myLabel changeTextWithAutoHeight:self.myStringToAssignToLabel width:180.0f];
</code></pre>

Is it possible to auto-resize the UILabel box/bounds to fit the contained text?
(I don't care if it ends up larger than the display)

So if a user enters "hello" or "my name is really long i want it to fit in this box", it is never truncated and the label is 'widened' accordingly?

UILabel - auto-size label to fit text?

是否可以自动调整UILabel框/边界的大小以适合所包含的文本？(我不关心它最终是否比显示屏更大)因此，如果用户输入"hello“或”我的名字真的很长，我希望它适合这个框“，它永远不会被截断，标签也会相应地”加宽“？

问UILabel -自动调整标签大小以适应文本？
EN

回答 8

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问UILabel -自动调整标签大小以适应文本？EN

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