swift - 当从 xib 加载 subview 到 UIScrollView 时，快速出现错误 'EXC_BAD_ACCESS'

Question

我正在尝试从 xib 加载自定义 UIView

customView.swift

导入UIKit

@IBDesignable class customView: UIView {

var view: UIView!

override init(frame: CGRect) {
    super.init(frame: frame)

    xibSetup()
}

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)

    xibSetup()
}


func xibSetup() {
    view = loadViewFromNib()
    view.frame = bounds
    view.autoresizingMask = [UIViewAutoresizing.FlexibleWidth, UIViewAutoresizing.FlexibleHeight]

    addSubview(view)
}

func loadViewFromNib() -> UIView {
    let nibName:String = "customView"
    let bundle = NSBundle(forClass: self.dynamicType)
    let nib = UINib(nibName: nibName, bundle: bundle)
    let view = nib.instantiateWithOwner(self, options: nil)[0] as! UIView // **Getting error at this line**
    return view
}
}

customView.xib

文件的所有者是 CustomView 类。

在 Storyboard中

我有一个 UIViewController( ScrollView Controller )，其中包含一个带有自定义类的 UIView:CustomView。 xib @IBDesignable 传播通过，一切都很好。

现在问题开始了。我试图在 ScrollViewController 中多次使用 customView(就像 tableView 中的单元格一样)，就像我对 viewOne 所做的那样

MyUIViewController.swift

import UIKit


class MyUIViewController: UIViewController,UIScrollViewDelegate {

let scrollView = UIScrollView()
let height = CGFloat(234.0)

override func viewDidLoad() {
    super.viewDidLoad()

    self.scrollView.frame = CGRectMake(0, 150, self.view.bounds.size.width, height)
    self.scrollView.contentSize = CGSizeMake(height*3,self.view.bounds.size.width)
    self.scrollView.backgroundColor = UIColor.redColor()
    self.view.addSubview(self.scrollView)

    var y = CGFloat(0.0)

    for i in 0..<2 {

        //Adding viewOne
        let viewOne = self.createViewOne(i)
        viewOne.frame = CGRectMake(0, y, 320, 200)
        self.scrollView.addSubview(viewOne)

        //Adding CustomView
        let customView = self.createCustomView(i)
        customView.frame = CGRectMake(0, y, 320, 200)
        self.scrollView.addSubview(customView)

        y += height
    }

}

func createViewOne(index: Int) -> UIView {
    let viewOne = UIView()

    if index == 0{
        viewOne.backgroundColor = UIColor.greenColor()
    }

    if index == 1{
        viewOne.backgroundColor = UIColor.redColor()
    }

    return viewOne
}


func createCustomView(index: Int) -> UIView {

    let customViewDummy: customView = NSBundle.mainBundle().loadNibNamed("customView", owner: self, options: nil)[0] as! customView

    if index == 0{
        customViewDummy.backgroundColor = UIColor.greenColor()
    }

    if index == 1{
        customViewDummy.backgroundColor = UIColor.redColor()
    }

    return customViewDummy
}


override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}
}

我试图在 ViewController 中多次从 nib 加载自定义 UIView。

我引用了以下链接 - How to use custom nib view in ViewController multiple times

我使用的是 Xcode 7.3.1

如有任何建议，我们将不胜感激。提前谢谢您。

Answer 1

您将在 customView 中再创建一个view，并将其添加为 subView。因此出现了一些不匹配的情况。尝试下面的代码并确保您的 filesOnwer 设置为 customView:

@IBDesignable class customView: UIView {

    override init(frame: CGRect) {
        super.init(frame: frame)

        loadViewFromNib()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)

        loadViewFromNib()
    }

    func loadViewFromNib() -> UIView {
        let myView = NSBundle.mainBundle().loadNibNamed("customView", owner: self, options: nil).first as! UIView
    return myView
    }
}