在 Swift 中将 xib 分配给 UIView [英] Assign xib to the UIView in Swift

问题描述

在objective c中，它可以在init方法中通过

in objective c it can be done in init method by

-(id)init{
    self = [[[NSBundle mainBundle] loadNibNamed:@"ViewBtnWishList" owner:0 options:nil]     objectAtIndex:0];
return self;
}

但是当我快速执行此操作时

but when i do this in swift

init(frame: CGRect) {
    self = NSBundle.mainBundle().loadNibNamed("ViewDetailMenu", owner: 0, options: nil)[0] as? UIView
}

cannot assignment to self in a method 显示错误.现在我的方法是创建一个视图，并将从 nib 加载的视图添加到它.有人有更好的主意吗?

cannot assign to self in a method error is shown. now my approach is to create a view, and add the view loaded from nib to it. anyone have a better idea?

推荐答案

for Swift 4

extension UIView {
    class func loadFromNibNamed(nibNamed: String, bundle: Bundle? = nil) -> UIView? {
      return UINib(
          nibName: nibNamed,
          bundle: bundle
      ).instantiate(withOwner: nil, options: nil)[0] as? UIView
  }
}

适用于 Swift 3

你可以在 UIView 上创建一个扩展:

You could create an extension on UIView:

extension UIView {
    class func loadFromNibNamed(nibNamed: String, bundle: NSBundle? = nil) -> UIView? {
        return UINib(
            nibName: nibNamed,
            bundle: bundle
        ).instantiateWithOwner(nil, options: nil)[0] as? UIView
    }
}

注意:使用 UINIb 速度更快，因为它会为您缓存.

Note: Using UINib is faster because it does caching for you.

然后你可以这样做:

ViewDetailItem.loadFromNibNamed("ViewBtnWishList")

并且您将能够在任何视图上重复使用该方法.

And you will be able to reuse that method on any view.

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