Here is my Objective-C code which I'm using to load a nib for my customised UIView
:
-(id)init{
NSArray *subviewArray = [[NSBundle mainBundle] loadNibNamed:@"myXib" owner:self options:nil];
return [subviewArray objectAtIndex:0];
}
What is the equivalent code in Swift?
Original Solution
.
class SomeView: UIView {
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
NSBundle.mainBundle().loadNibNamed("SomeView", owner: self, options: nil)
self.addSubview(self.view); // adding the top level view to the view hierarchy
}
...
}
Note that this way I get a class that loads itself from nib. I could then use SomeView as a class whenever UIView could be used in the project (in interface builder or programmatically).
Update - using Swift 3 syntax
Loading a xib in the following extension is written as an instance method, which can then be used by an initializer like the one above:
extension UIView {
@discardableResult // 1
func fromNib<T : UIView>() -> T? { // 2
guard let contentView = Bundle(for: type(of: self)).loadNibNamed(String(describing: type(of: self)), owner: self, options: nil)?.first as? T else { // 3
// xib not loaded, or its top view is of the wrong type
return nil
}
self.addSubview(contentView) // 4
contentView.translatesAutoresizingMaskIntoConstraints = false // 5
contentView.layoutAttachAll(to: self) // 6
return contentView // 7
}
}
And the caller method might look like this:
final class SomeView: UIView { // 1.
required init?(coder aDecoder: NSCoder) { // 2 - storyboard initializer
super.init(coder: aDecoder)
fromNib() // 5.
}
init() { // 3 - programmatic initializer
super.init(frame: CGRect.zero) // 4.
fromNib() // 6.
}
// other methods ...
}
Credit: Using a generic extension in this solution was inspired by Robert's answer below.
Edit Changing "view" to "contentView" to avoid confusion. Also changed the array subscript to ".first".