[swift-users] KVC - KeyPath in Operation
somu subscribe
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Tue Jun 13 08:40:22 CDT 2017
Hi,
I am having trouble using KeyPath to KVC (Key Value Code) in Swift 4.
I have a subclass of Operation and I am overriding the isFinished and isExecuting property.
Problem:
- When I use KeyPath, the completionBlock of the operation is not invoked.
- However when I use String instead of KeyPath, the completionBlock is invoked.
Questions:
- Am I missing something ?
- Is there a way to fix it using KeyPath ?
Code:
override var isExecuting : Bool {
get {
return _executing //property in the class
}
set {
willChangeValue(for: \.isExecuting)
_executing = newValue
didChangeValue(for: \.isExecuting)
}
}
override var isFinished : Bool {
get {
return _finished //property in the class
}
set {
willChangeValue(for: \.isFinished)
_finished = newValue
didChangeValue(for: \.isFinished)
}
}
Configuration:
- Xcode - 9.0 beta (9M136h)
- Tested on Simulator (iOS 11)
- macOS Sierra - 10.12.5 (16F73)
Thanks and Regards,
Muthu
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