Question

我正在尝试从nib加载自定义UIView

CustomView.swift

import 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 {
        var nibName:String = "CustomView"
        var bundle = NSBundle(forClass: self.dynamicType)
        var nib = UINib(nibName: nibName, bundle: bundle)

        var view = nib.instantiateWithOwner(self, options: nil)[0] as UIView
        return view
    }

}

CustomView.xib

文件所有者是CustomView类。

在StoryBoard中

我有一个带有自定义类的UIView的UIViewController（Scroll View Controller）：CustomView。 xib @IBDesignable传播通过，一切顺利。

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一样

ScrollViewController.swift

import UIKit

class ScrollViewController: UIViewController {

    let scrollView = UIScrollView()


    override func viewDidLoad() {
        super.viewDidLoad()

        let height = CGFloat(200.0)

        self.scrollView.frame = self.view.bounds
        self.scrollView.contentSize = CGSizeMake(self.view.bounds.size.width, height*3)
        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 customView: CustomView = NSBundle.mainBundle().loadNibNamed("CustomView", owner: self, options: nil)[0] as CustomView  --> Code breaks here

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

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

        return customView
    }


}

问题代码在下面的行中断，控制台输出无用（lldb）

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

我也尝试使用此代码进行实例化：

customView = CustomView.loadViewFromNib()

然后我得到错误＆＃34;在调用＆＃34;

中缺少参数＃1的参数

1）如何在ViewController中多次从nib加载自定义UIView。 2）如何更改视图中包含的UI元素，例如UIImageView，UILabels等。如何设置标题，如customView.title.text =＆＃34; Fido＆＃34;

非常感谢任何帮助！谢谢。

Answer 1

视图类的重点是加载nib并将创建的视图添加为子视图。它也被定义为笔尖的所有者。

因此，当您的视图控制器尝试将自己作为所有者加载nib时，它会调用所有的插座设置器，但它没有实现它们，因此它会中断。

要修复，你应该分配并启动视图，而不是在视图控制器中明确地从nib加载它。

替换

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

与

let customView = CustomView()

如何多次在ViewController中使用自定义nib视图

1 个答案: