假设我在UIStackView中添加了更多可以显示的视图,我如何让UIStackView滚动?
当前回答
你可以试试ScrollableStackView: https://github.com/gurhub/ScrollableStackView
它是Objective-C和Swift兼容的库。它可以通过CocoaPods获得。
样本代码(Swift)
import ScrollableStackView
var scrollable = ScrollableStackView(frame: view.frame)
view.addSubview(scrollable)
// add your views with
let rectangle = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 55))
rectangle.backgroundColor = UIColor.blue
scrollable.stackView.addArrangedSubview(rectangle)
// ...
样例代码(Objective-C)
@import ScrollableStackView
ScrollableStackView *scrollable = [[ScrollableStackView alloc] initWithFrame:self.view.frame];
scrollable.stackView.distribution = UIStackViewDistributionFillProportionally;
scrollable.stackView.alignment = UIStackViewAlignmentCenter;
scrollable.stackView.axis = UILayoutConstraintAxisVertical;
[self.view addSubview:scrollable];
UIView *rectangle = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 55)];
[rectangle setBackgroundColor:[UIColor blueColor]];
// add your views with
[scrollable.stackView addArrangedSubview:rectangle];
// ...
其他回答
First and foremost design your view, preferably in something like Sketch or get an idea of what do you want as a scrollable content. After this make the view controller free form (choose from attribute inspector) and set height and width as per the intrinsic content size of your view (to be chosen from the size inspector). After this in the view controller put a scroll view and this is a logic, which I have found to be working almost all the times in iOS (it may require going through the documentation of that view class which one can obtain via command + click on that class or via googling) If you are working with two or more views then first start with a view, which has been introduced earlier or is more primitive and then go to the view which has been introduced later or is more modern. So here since scroll view has been introduced first, start with the scroll view first and then go to the stack view. Here put scroll view constraints to zero in all direction vis-a-vis its super view. Put all your views inside this scroll view and then put them in stack view.
当使用堆栈视图时
First start with grounds up(bottoms up approach), ie., if you have labels, text fields and images in your view, then lay out these views first (inside the scroll view) and after that put them in the stack view. After that tweak the property of stack view. If desired view is still not achieved, then use another stack view. If still not achieved then play with compression resistance or content hugging priority. After this add constraints to the stack view. Also think of using an empty UIView as filler view, if all of the above is not giving satisfactory results.
在创建视图之后,在母堆栈视图和滚动视图之间放置一个约束,同时约束子堆栈视图和母堆栈视图。 希望这个时候它能正常工作,否则你可能会从Xcode得到一个警告,给出建议,阅读它所说的并执行这些建议。希望现在你应该有一个工作视图按照你的期望:)。
如果有人在找水平滚动视图
func createHorizontalStackViewsWithScroll() {
self.view.addSubview(stackScrollView)
stackScrollView.translatesAutoresizingMaskIntoConstraints = false
stackScrollView.heightAnchor.constraint(equalToConstant: 85).isActive = true
stackScrollView.leadingAnchor.constraint(equalTo: self.view.leadingAnchor).isActive = true
stackScrollView.trailingAnchor.constraint(equalTo: self.view.trailingAnchor).isActive = true
stackScrollView.bottomAnchor.constraint(equalTo: visualEffectViews.topAnchor).isActive = true
stackScrollView.addSubview(stackView)
stackView.translatesAutoresizingMaskIntoConstraints = false
stackView.topAnchor.constraint(equalTo: stackScrollView.topAnchor).isActive = true
stackView.leadingAnchor.constraint(equalTo: stackScrollView.leadingAnchor).isActive = true
stackView.trailingAnchor.constraint(equalTo: stackScrollView.trailingAnchor).isActive = true
stackView.bottomAnchor.constraint(equalTo: stackScrollView.bottomAnchor).isActive = true
stackView.heightAnchor.constraint(equalTo: stackScrollView.heightAnchor).isActive = true
stackView.distribution = .equalSpacing
stackView.spacing = 5
stackView.axis = .horizontal
stackView.alignment = .fill
for i in 0 ..< images.count {
let photoView = UIButton.init(frame: CGRect(x: 0, y: 0, width: 85, height: 85))
// set button image
photoView.translatesAutoresizingMaskIntoConstraints = false
photoView.heightAnchor.constraint(equalToConstant: photoView.frame.height).isActive = true
photoView.widthAnchor.constraint(equalToConstant: photoView.frame.width).isActive = true
stackView.addArrangedSubview(photoView)
}
stackView.setNeedsLayout()
}
如果有人正在寻找一个没有代码的解决方案,我创建了一个例子来完成这完全在故事板,使用自动布局。
你可以从github上得到。
基本上,要重新创建这个示例(用于垂直滚动):
创建一个UIScrollView,并设置它的约束。 添加一个UIStackView到UIScrollView 设置约束:前导,后尾,顶部和底部应该等于UIScrollView中的约束 在UIStackView和UIScrollView之间设置一个等宽约束。 在UIStackView上设置轴=垂直,对齐=填充,分布=等间距,间距= 0 添加一些uiview到UIStackView 运行
在第4步中将宽度交换为高度,并在第5步中设置轴=水平,以获得水平的UIStackView。
我也想做同样的事情,偶然发现了这个优秀的帖子。如果您希望使用锚API以编程方式完成此操作,则可以采用这种方式。
总之,在UIScrollView中嵌入UIStackView,并设置UIStackView的锚约束来匹配UIScrollView的锚约束:
stackView.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor).isActive = true
stackView.trailingAnchor.constraint(equalTo: scrollView.trailingAnchor).isActive = true
stackView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor).isActive = true
stackView.topAnchor.constraint(equalTo: scrollView.topAnchor).isActive = true
stackView.widthAnchor.constraint(equalTo: scrollView.widthAnchor).isActive = true
到2020年为止。
100%故事板或100%代码。
这个例子是垂直的:
下面是最简单的解释:
有一个空白的全屏场景 添加一个滚动视图。Control-drag从滚动视图拖到基本视图,添加左-右-上-下,全部为零。 在滚动视图中添加堆栈视图。从堆栈视图Control-drag到滚动视图,添加左-右-上-下,全部为零。 在堆栈视图中放置两个或三个标签。
为了清晰,标签的背景颜色为红色。设置标签高度为100。
现在设置每个UILabel的宽度: 令人惊讶的是,从UILabel控件拖动到滚动视图,而不是堆栈视图,并选择相同的宽度。
重复:
不要从UILabel控件拖动到UILabel的父控件,而是拖到祖父控件。(换句话说,一直到滚动视图,不要到堆栈视图。)
就是这么简单。这就是秘诀。
秘密提示——苹果臭虫: 只有一件物品是不行的!添加几个标签以使演示正常工作。
你就完成了。
提示:必须为每个新项添加高度。任何滚动堆栈视图中的每个项都必须具有固有大小(例如标签)或添加显式高度约束。
另一种方法:
回顾一下上面的方法:令人惊讶的是,将标签的宽度设置为滚动视图的宽度(而不是堆栈视图)。
这里有另一种方法……
从堆栈视图拖动到滚动视图,并添加一个“宽度相等”约束。这看起来很奇怪,因为你已经左右固定了,但这就是你怎么做的。不管看起来有多奇怪,这就是秘密。
所以你有两个选择:
令人惊讶的是,将堆栈视图中每个项的宽度设置为scrollview祖父类(而不是stackview父类)的宽度。
or
令人惊讶的是,设置一个“宽度相等”的stackview到scrollview -即使你有stackview的左右边固定到scrollview。
需要明确的是,只使用其中一种方法,不要同时使用两种方法。
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