Type Ccc Doesnt Conform to Protocol 'Nsobjectprotocol'

Type CCC doesnt conform to protocol 'NSObjectProtocol'

If you follow up the inheritance chain, NSURLSessionDataDelegate inherits NSURLSessionTaskDelegate, which inherits NSURLSessionDelegate, which inherits, NSObjectProtocol. This protocol has various required methods like isEqual(_:) and respondsToSelector(_:) which you class does not implement.

Generally what you would do here is make your class inherit NSObject which conforms to NSObjectProtocol:

class Test: NSObject, NSURLSessionDataDelegate {
    ...
}

Class does not conform NSObjectProtocol

See Why in swift we cannot adopt a protocol without inheritance a class from NSObject?

In short, WCSessionDelegate itself inherits from NSObjectProtocol therefore you need to implement methods in that protocol, too. The easiest way to implement those methods is to subclass NSObject:

class BatteryLevel: NSObject, WCSessionDelegate

Note that you are dealing with Obj-C APIs here.

MFMailComposeViewControllerDelegate not conform to protocol NSObjectProtocol

Where ever you use MFMailComposeViewControllerDelegate, The class your stating conforms to MFMailComposeViewControllerDelegate also needs to conform to NSObjectProtocol.

You can just inherit from NSObject to fix this.

class CustomersDetailPresenter: NSObject

class MyViewController: UIViewController, NSObject

Why doesn’t my controller conform to NSObjectProtocol?

See this:

https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/Protocols.html

You need to implement the protocol functions in order to conform to that protocol. Without that the protocol conformance is there useless, don't ya think? :) Anyway it's always better to extend the class via protocol in extension, like this:

extension SCViewController: AVCaptureMetadataOutputObjectsDelegate{
    //code here
}

Anyway more extensive description: As you can see, the delegates implements as "superProtocol" NSObjectProtocol,

see this:

https://developer.apple.com/documentation/avfoundation/avcapturemetadataoutputobjectsdelegate

So just implement the NSObjectProtocol functions and you will be fine... Happy coding :)

Edit: After realising I am a complete idiot and forgetting the essential things -> this should work, because the UIViewController class is subclass to UIResponder which is subclass to NSObject, therefore there might be problem with the class name or something like that... Would try to force the compiler to do strange things what it would do... like this:

extension SCViewController: NSObject, AVCaptureMetadataOutputObjectsDelegate{
    //code here
}

btw this above should definitely work.

Swift : Type XXX must conform to protocol 'NSObjectProtocol'

Self answered for sake of archiving.

When adding

override func isEqual(anObject: AnyObject?) -> Bool {
    return super.isEqual(anObject)
}

to my class, it works.
This method should have been inherited from the base class.

Looks like a bug in Swift / Xcode 6.1 to me

Default protocol implementation causes 'does not conform to protocol' error

Solved it! My NavigationDelegate and its extension were in a different target than the one that MyViewController belongs to. Simply moving the extension to the same target worked.

Hope this helps someone in the future /p>

How to make a class conform to a protocol in Swift?

Type 'CellDatasDataSource' does not conform to protocol 'NSObjectProtocol'

You have to make your class inherit from NSObject to conform to the NSObjectProtocol. Vanilla Swift classes do not. But many parts of UIKit expect NSObjects.

class CustomDataSource : NSObject, UITableViewDataSource {

}

But this:

Type 'CellDatasDataSource' does not conform to protocol 'UITableViewDataSource'

Is expected. You will get the error until your class implements all required methods of the protocol.

So get coding :)

Swift class/struct implicitly conforms to NSObjectProtocol?

Apparently, it’s both bug and feature. https://bugs.swift.org/browse/SR-10495

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