protocol-extension Questions
2
Solved
It seems reasonable to use UML Interfaces to visualize Swift Protocols in UML. But how should I visualize an extension that provides a default implementation for a specific protocol? Should I just ...
Heisser asked 29/5, 2016 at 12:35
4
I'm building simple theme engine and would like have an extension which adds UISwipeGestureRecognizer to UIViewController
Here is my code:
protocol Themeable {
func themeDidUpdate(currentTheme: ...
Demography asked 14/4, 2016 at 16:52
6
Solved
When implementing a static protocol function returning Self in a protocol extension, an error appears at the implementation of the function in the extension (minimal simplified scenario shown witho...
Partizan asked 15/12, 2015 at 13:1
4
Solved
I'd like to do something like this, but can't get the syntax right or find anywhere on the web that gives the right way to write it:
protocol JSONDecodeable {
static func withJSON(json: NSDiction...
Blalock asked 19/10, 2015 at 16:22
3
Solved
I found an interesting behaviour which seems like a bug...
Based on the behaviour described the following articles:
https://medium.com/ios-os-x-development/swift-protocol-extension-method-dispatc...
Brownell asked 18/1, 2016 at 4:24
4
I have a set of view controllers which will have a Menu bar button. I created a protocol for those viewControllers to adopt. Also, I've extended the protocol to add default functionalities.
My pr...
Hypocrite asked 25/11, 2015 at 14:23
2
I have a protocol with an associatedType.
I want to give a default typealias for that type in the protocol extension. This is to be done only for classes that inherit from a particular class.
pro...
Reuven asked 28/5, 2016 at 7:22
2
I have an Objective-C protocol which is used by mostly objective-C objects and one or two Swift objects.
I would like to extend the protocol in Swift and add 2 functions. One to register for a noti...
Peart asked 16/8, 2016 at 17:19
5
Let's consider the following code:
protocol A {
func doA()
}
extension A {
func registerForNotification() {
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardD...
Quoin asked 8/10, 2015 at 17:40
5
Solved
So I'm trying to extend Swift's integer types with a few convenient functions that I use a lot, however I'm not clear on which protocols I should be extending.
As an example, let's say I want to i...
Gilboa asked 11/8, 2015 at 13:55
3
Is it possible to call methods defined in a protocol extension in Swift from Objective-C?
For example:
protocol Product {
var price:Int { get }
var priceString:String { get }
}
extension Produ...
Carolynecarolynn asked 24/9, 2015 at 13:36
1
Solved
I have been playing around with protocol extensions and I have a problem. Maybe what I want to achieve can’t be done. I have this playground:
//: Playground - noun: a place where people can play
...
Systematist asked 15/9, 2015 at 9:36
2
Is it possible to add protocol compliance to a different protocol by way of an extension?
For instance we would like A to comply with B:
protocol A {
var a : UIView {get}
}
protocol B {
var b ...
Keramics asked 19/5, 2016 at 14:28
2
Solved
I have the following code:
func registerNotification(name:String, selector:Selector)
{
NSNotificationCenter.defaultCenter().addObserver(self, selector: selector, name: name, object: nil)
}
func ...
Ducharme asked 23/3, 2016 at 8:52
3
I'm trying to implement the CLLocationManagerDelegate protocol requirements via a protocol extension, but the location manager doesn't see it in the protocol extension and fails. However, it works ...
Regent asked 20/2, 2016 at 15:8
2
Consider the following:
protocol Foo {
typealias A
func hello() -> A
}
protocol FooBar: Foo {
func hi() -> A
}
extension FooBar {
func hello() -> A {
return hi()
}
}
class FooBarCl...
Wisner asked 28/11, 2015 at 5:35
1
Solved
Consider the following:
protocol ViewControllable: class {
typealias VM: ViewModellable
var vm: VM! { get }
func bind()
}
extension ViewControllable {
var vm: VM! {
didSet {
bind()
}
}
}...
Ultrasonic asked 23/11, 2015 at 3:48
3
Solved
I have a fairly big application which has a lot of collection views. Most of the collection view have same implementations for Data Source and the Flow Layout Delegate (same sizes, margins etc). I ...
Pinard asked 8/10, 2015 at 9:0
2
Solved
protocol Car {
static func foo()
}
struct Truck : Car {
}
extension Car {
static func foo() {
print("bar")
}
}
Car.foo() // Does not work
// Error: Car does not have a member named foo
T...
Ola asked 14/8, 2015 at 8:48
1
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