无法从Xcode6.1中的故事板连接自定义协议委托-CannotconnectcustomprotocoldelegatefromstoryboardinXcode6.1

12  

https://developer.apple.com/library/ios/releasenotes/DeveloperTools/RN-Xcode/Chapters/Introduction.html#//apple_ref/doc/uid/TP40001051

https://developer.apple.com/library/ios/releasenotes/DeveloperTools/RN-Xcode/Chapters/Introduction.html#//apple_ref/doc/uid/TP40001051

Interface Builder

Interface Builder

Interface Builder does not support connecting to an outlet in a Swift file when the outlet’s type is a protocol. 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. (17023935)

当插座的类型是协议时，Interface Builder不支持连接到Swift文件中的插座。将插座的类型声明为AnyObject或NSObject，使用Interface Builder将对象连接到插座，然后将插座的类型更改回协议。 （17023935）

it's sucks...

太糟糕了......

5  

It's 2017....

这是2017年....

Using swift 3, this will work:

使用swift 3，这将工作：

open class YourClass: UIView {

    #if TARGET_INTERFACE_BUILDER
    @IBOutlet open weak var delegate: AnyObject?
    #else
    open weak var delegate: YourClassDelegate?
    #endif

}

A precondition is:

一个先决条件是：

YourClassDelegate must be decorated with @objc

YourClassDelegate必须用@objc修饰

For example:

例如：

@objc public protocol MyDelegate: class {
    func myFunc()
    func myFunc2()
}

Update

This should be fixed in Xcode 9

这应该在Xcode 9中修复