在Interface Builder中无法将CustomView的委托属性声明为@IBOutlet toViewController – 根本无法建立连接。
这是代码
class CustomView: UIView {
@IBOutlet var delegate: CustomViewDelegate?
}
@objc protocol CustomViewDelegate {
...
}
class ViewController: UIViewController,CustomViewDelegate {
...
}
使用@objc因为swift protocol,IBOutlet property cannot have non-object type，不知道为什么协议CustomViewDelegate：class {}不起作用。
还有人碰到过这样的东西吗？
从Xcode发行说明：
Interface Builder does not support connecting to an outlet in a Swift file when the outlet’s type is a protocol.
Workaround: Declare the outlet’s type as AnyObject or NSObject,connect objects to the outlet using Interface Builder,then change the outlet’s type back to the protocol.
