ios - 当 UILabel 动态调整大小时，移动 UIView 中的 UIButton。 iOS系统

Question

我在自定义 UIView 中有一个 UILabel 和一个 UIButton。我的 UIButton 网站位于我的 UILabel 下方。

我的 UILabel 文本改变了它的大小并与我的 UIButton 重叠。

我希望能够在 UILabel 自行调整大小时向下移动 UIButton？

我只设法动态调整了我的 UILabel 的大小，但无法调整或移动我的 UIButton。

self.chosenCategoriesLabel.font = [UIFont fontWithName:@"Helvetica-Light" size:17.0];
self.chosenCategoriesLabel.textColor = [UIColor colorWithRed:161.0/255.0 green:205.0/255.0 blue:86.0/255.0 alpha:1.0];
self.chosenCategoriesLabel.font = [UIFont fontWithName:@"Helvetica-Light" size:15.0];
self.chosenCategoriesLabel.numberOfLines = 0;
self.selectedCategoriesString = [self.selectedCategoriesArray componentsJoinedByString:@","];
self.chosenCategoriesLabel.lineBreakMode = NSLineBreakByWordWrapping;
self.chosenCategoriesLabel.text = [self.selectedCategoriesString stringByAppendingString:@"\n\n\n\n"];
[self.selectionsWrapper addSubview:self.chosenCategoriesLabel];

self.chosenCategoriesLabel.frame = CGRectMake(self.chosenCategoriesLabel.frame.origin.x, self.chosenCategoriesLabel.frame.origin.y, self.chosenCategoriesLabel.frame.size.width, [self sizeLabel]);

[self.itemThumbnail setImageWithURL:self.item.itemImageURL placeholderImage:[UIImage imageNamed:@"profile-image-placeholder"]];
[self.view addSubview:self.itemThumbnail];

[self.selectCategorieButton setTitle:@"Select Categories" forState:UIControlStateNormal];
[self.selectCategorieButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[self.selectCategorieButton setTitle:@"Select Categories" forState:UIControlStateHighlighted];
[self.selectCategorieButton setTitleColor:[UIColor whiteColor] forState:UIControlStateHighlighted];
self.selectCategorieButton.titleLabel.font = lightHelveticaFont;
[self.selectCategorieButton setBackgroundImage:[UIImage imageNamed:@"btn_choose_categories.png"] forState:UIControlStateNormal];
[self.selectCategorieButton setBackgroundImage:[UIImage imageNamed:@"btn_choose_categories.png"] forState:UIControlStateHighlighted];
[self.selectCategorieButton.titleLabel setFont:[UIFont boldSystemFontOfSize:15]];
[self.selectCategorieButton.titleLabel setFont:[UIFont fontWithName:@"Helvetica-Light" size:15.0]];
[self.selectionsWrapper addSubview:self.selectCategorieButton];

[self changeLabel];

self.chosenCategoriesLabel.frame = CGRectMake(self.chosenCategoriesLabel.frame.origin.x, self.chosenCategoriesLabel.frame.origin.y, self.chosenCategoriesLabel.frame.size.width, [self sizeLabel]);

-(void)changeLabel {

self.chosenCategoriesLabel = [NSString stringWithFormat:@"%@",array]; 

self.chosenCategoriesLabel.frame = CGRectMake(self.chosenCategoriesLabel.frame.origin.x, self.chosenCategoriesLabel.frame.origin.y, self.chosenCategoriesLabel.frame.size.width, [self sizeLabel]);

 }

- (CGFloat) sizeLabel
{
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
CGSize sizeToFit = [self.chosenCategoriesLabel.text sizeWithFont:[UIFont systemFontOfSize:12.0f] constrainedToSize:CGSizeMake(276.0f, CGFLOAT_MAX) lineBreakMode:NSLineBreakByWordWrapping];
#pragma clang diagnostic pop
return fmaxf(22.0f, sizeToFit.height + 40); }

Answer 1

一些事情...

当您说您已经在 IB 中创建了 UI 组件时，我不确定您为什么要再次重新添加它们？例如，如果控件已经在 View 中，则不需要像下面这样的行

[self.selectionsWrapper addSubview:self.chosenCategoriesLabel];

这一行你也执行了两次？

self.chosenCategoriesLabel.frame = CGRectMake(self.chosenCategoriesLabel.frame.origin.x, self.chosenCategoriesLabel.frame.origin.y, self.chosenCategoriesLabel.frame.size.width, [self sizeLabel]);

要调整按钮的框架，请执行以下操作...

// Get the original frames;
CGRect buttonFrame = self.selectCategorieButton.frame;
CGRect labelFrame = self.chosenCategoriesLabel.frame;

//Work out the new height
CGFloat newHeight = [self sizeLabel];

//Work out what the difference is
CGFloat adjustment = newHeight - labelFrame.size.height;

//Set the labels new height
labelFrame.size.height = newHeight;
self.chosenCategoriesLabel.frame = labelFrame;

//add the difference to the buttons frame
buttonFrame.origin.y = buttonFrame.origin.y + adjustment;
self.selectCategorieButton.frame = buttonFrame;

根据您定义自定义 View 的方式，您可能还需要调整它的高度以适应按钮的新位置？