Question

我正在尝试将标签高度修改为动态，以取决于文本。

CGSize size = [Str sizeWithAttributes:
                       @{NSFontAttributeName: [UIFont fontWithName:@"OpenSans" size:15]}];
        CGSize adjustedSize = CGSizeMake(ceilf(size.width), ceilf(size.height));
        NSLog(@"this is height of the label =%@",NSStringFromCGSize(adjustedSize));

这里我得到了宽度和高度，但宽度超过了屏幕尺寸宽度。

我想要的是标签宽度应该等于我的屏幕尺寸，高度取决于文字........

Answer 1

设置

yourLabel.numberOfLines = 0;
[yourLabel sizeToFit];

为该标签指定特定宽度或前导和尾随空格，以使宽度保持固定，并根据文本长度增加高度。

您还可以通过xib文件设置numberOfLines。 1.单击xib中的标签。 2.在对齐选项卡下方的右侧面板上，您可以将numberOfLines从1设置为0.

Answer 2

选择您的标签单击编辑器并选择大小以适合内容

Answer 3

我认为您的自定义字体会产生问题。您可以使用此代码计算动态大小

NSAttributedString *attributedText = [[NSAttributedString alloc] initWithString:text attributes:@{NSFontAttributeName: font}];
CGRect rect = [attributedText boundingRectWithSize:(CGSize){width, CGFLOAT_MAX}
                                       options:NSStringDrawingUsesLineFragmentOrigin
                                       context:nil];
CGSize size = rect.size;

Answer 4

您可以将标签高度修改为动态，以取决于具有以下代码的文本

NSString * str = [NSString stringWithFormat：@“Lorem Ipsum只是打印和排版行业的虚拟文本。自16世纪以来，Lorem Ipsum一直是业界标准的虚拟文本，当时一台未知的打印机采用了类型的厨房把它拼凑成一本样本书。“];

CGSize maximumLabelSize = CGSizeMake(self.view.frame.size.width - 20, FLT_MAX);

CGSize expectedLabelSize = [str sizeWithFont:[UIFont fontWithName:@"OpenSans" size:15] constrainedToSize:maximumLabelSize lineBreakMode:NSLineBreakByWordWrapping];


UILabel *Label = [[UILabel alloc] init];
[Label setTranslatesAutoresizingMaskIntoConstraints:NO];
//set new frame to label.
CGRect newFrame = Label.frame;
newFrame.origin.x = 10;
newFrame.origin.y = 20;
newFrame.size.width = expectedLabelSize.width - 20;
newFrame.size.height = expectedLabelSize.height;
Label.frame = newFrame;
Label.text = str;
Label.lineBreakMode = NSLineBreakByWordWrapping;
Label.numberOfLines = 20;
Label.font = [UIFont fontWithName:@"OpenSans" size:15];
Label.backgroundColor = [UIColor redColor];

[self.view addSubview:Label];

//width constraint
[Label addConstraint:[NSLayoutConstraint constraintWithItem:Label
                                                  attribute:NSLayoutAttributeWidth
                                                  relatedBy:NSLayoutRelationEqual
                                                     toItem:nil
                                                  attribute: NSLayoutAttributeNotAnAttribute
                                                 multiplier:1
                                                   constant:expectedLabelSize.width - 20]];

//height constraint
[Label addConstraint:[NSLayoutConstraint constraintWithItem:Label
                                                  attribute:NSLayoutAttributeHeight
                                                  relatedBy:NSLayoutRelationEqual
                                                     toItem:nil
                                                  attribute: NSLayoutAttributeNotAnAttribute
                                                 multiplier:1
                                                   constant: expectedLabelSize.height]];

//center constraint
[self.view addConstraint:[NSLayoutConstraint constraintWithItem:self.view
                                                       attribute:NSLayoutAttributeCenterX
                                                       relatedBy:NSLayoutRelationEqual
                                                          toItem:Label
                                                       attribute: NSLayoutAttributeCenterX
                                                      multiplier:1
                                                        constant:0]];
// Top constraint
[self.view addConstraint:[NSLayoutConstraint constraintWithItem:Label
                                                      attribute:NSLayoutAttributeTop
                                                      relatedBy:NSLayoutRelationEqual
                                                         toItem:self.topLayoutGuide
                                                      attribute: NSLayoutAttributeBottom
                                                     multiplier:1
                                                       constant:20]];

Answer 5

1.来自Xib你需要设置否。该标签的第0行：

并使用此方法：

<?php echo esc_url( $product->add_to_cart_url() ); ?>

将此方法称为：

- (CGFloat)getHeightforController:(id)view{
UILabel *tempView =(UILabel *)view;
NSStringDrawingContext *context = [[NSStringDrawingContext alloc] init];
context.minimumScaleFactor = 0.8;

float width = tempView.frame.size.width;

width = width * ([[UIScreen mainScreen] bounds].size.width/320);

CGSize size=[tempView.text boundingRectWithSize:CGSizeMake(tempView.frame.size.width, 200)
                                        options:NSStringDrawingUsesLineFragmentOrigin
                                     attributes:@{ NSFontAttributeName : tempView.font}
                                        context:context].size;
return size.height;
}

确保在调用此方法之前为标签设置文本

Answer 6

使用自动布局或这样做

yourLabel.numberOfLines = 0;
yourLabel.lineBreakMode = NSLineBreakByWordWrapping;
yourLabel.autoresizingMask = UIViewAutoresizingFlexibleHeight;

如何将uilabel高度修改为动态[取决于文本]？

6 个答案: