XIB的自定义Uiview不调整大小

发布于 2025-01-28 03:40:59 字数 1758 浏览 2 评论 0原文

我的目的是为MkannotationView创建自定义图像。

图像中的“服务项目”的数量在每个注释中都不同 - ＆gt;应该可以动态地更改视图中的项目。

我的想法是创建自定义Uiview（XIB），以编程方式加载XIB并动态更改项目。然后，我将Uiview转换为uiimage。

//serviceannotationview.xib

//ServiceAnnotationView.class
class ServiceAnnotationView: UIView{
    
}

//扩展名Uiview-＆gt;可以动态创建注释图像从代码加载XIB文件

extension UIView {
    class func fromNib<T: UIView>() -> T {
        return Bundle(for: T.self).loadNibNamed(String(describing: T.self), owner: nil, options: nil)![0] as! T
    }

。

let view = MKAnnotationView(annotation: annotation, reuseIdentifier: identifier)
let serviceAnnotationView: ServiceAnnotationView = ServiceAnnotationView.fromNib()
view.image = serviceAnnotationView.asImage()

显示2个项目时的结果：

结果显示1个项目

https://i.sstatic.net/vxnrm.png“ alt =”在此处输入图像描述>

在这种情况下，Uiview应该自动收缩。 Uiview的宽度总是相同的。不管UistackView中存在多少个项目。

到目前为止，我尝试了什么？我试图根据项目数来为Uiview指定框架。 - ＆gt;没有成功

，然后我根据项目数来更改Uiview的约束大小。 - ＆gt; 成功

由于UistackView，Uiview不得。为什么在这种情况下没有发生？

原文

My aim is to create custom image for MKAnnotationView.

The number of "service items" in image can be different for every annotation -> it should be possible to dynamically change items in view.

My idea was to create custom UIView (xib), load xib programmatically and change items dynamically. Then I would convert UIView to UIImage.

//ServiceAnnotationView.xib

//ServiceAnnotationView.class
class ServiceAnnotationView: UIView{
    
}

//extension UIView -> possible to load xib file from code

extension UIView {
    class func fromNib<T: UIView>() -> T {
        return Bundle(for: T.self).loadNibNamed(String(describing: T.self), owner: nil, options: nil)![0] as! T
    }

Creating annotation image dynamically.

let view = MKAnnotationView(annotation: annotation, reuseIdentifier: identifier)
let serviceAnnotationView: ServiceAnnotationView = ServiceAnnotationView.fromNib()
view.image = serviceAnnotationView.asImage()

Result when showing 2 items:

Result when showing 1 items

In this case the UIView should automatically shrink.
The width of UIView is always the same. No matter how many items are present in UIStackView.

What I have tried so far?
I was trying to specify frame for UIView based on number of items. -> no success

Then I was changing constraint size of UIView based on number of items. -> no success

The UIView should automatically resize due to UIStackView. Why in this case is not happening?

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勿挽旧人 2025-02-04 03:40:59

您已经遗漏了有关设置以及实际使用此方法的大量信息，但这可能会有所帮助...

假设您有：

serviceanNotation View中的一些var/func以显示/在堆栈视图中隐藏图像
您有一个工作uiview .asimage（）
已在图像（例如高度和宽度）

呼叫< Code> .setneedslayout（）和.layoutifneed（） nater nater calle .asimage（）：

    let serviceAnnotationView: ServiceAnnotationView = ServiceAnnotationView.fromNib()

    // however you're setting the number of images to show in the stack view        
    serviceAnnotationView.numItems = 3
    
    serviceAnnotationView.translatesAutoresizingMaskIntoConstraints = false
    
    serviceAnnotationView.setNeedsLayout()
    serviceAnnotationView.layoutIfNeeded()
    
    let img = serviceAnnotationView.asImage()

You've left out a lot of information about your setup and how you're actually trying to use this, but this might help...

Assuming you have:

some var/func in your ServiceAnnotationView to show/hide the images in the stack view
you have a working UIView extension for .asImage()
you've set sizing constraints on the images (e.g. Height and Width)

Call .setNeedsLayout() and .layoutIfNeeded() before calling .asImage():

    let serviceAnnotationView: ServiceAnnotationView = ServiceAnnotationView.fromNib()

    // however you're setting the number of images to show in the stack view        
    serviceAnnotationView.numItems = 3
    
    serviceAnnotationView.translatesAutoresizingMaskIntoConstraints = false
    
    serviceAnnotationView.setNeedsLayout()
    serviceAnnotationView.layoutIfNeeded()
    
    let img = serviceAnnotationView.asImage()

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