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Why does this Timer/RunLoop code work? It shouldn’t
The Next CEO of Stack OverflowWhat does this mean? “'NSUnknownKeyException', reason: … this class is not key value coding-compliant for the key X”How to call Objective-C code from SwiftIncreasing an images size over time?Why don't use var at the beginning?How to detect tableView cell touched or clicked in swiftSwift 2 iOS 9 animation disappears after button text changedunable to add SSRadioButtonsController radio button title from codecast from [UICollectionViewCell] to unrelated type 'profileviewCell' as alwaysAVaudioplayer audio player progess as Uislider crashesSwift Error - Use of undeclared type 'cell' - Collection View
class A: Timer
var myTimer: Timer!
class TimerTestViewController: UIViewController
var a = A()
override func viewDidLoad()
super.viewDidLoad()
a.myTimer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(timerRun), userInfo: nil, repeats: true)
RunLoop.current.add(a, forMode: RunLoop.Mode.common)
a.myTimer.fire()
Notice in RunLoop.current.add(a, forMode: .common) that i didn't add a.myTimer to runloop but “accidentally” added a to the runloop.
why does this code work at all?
ios swift nsrunloop
edited Mar 8 at 17:37
Rob
306k51576745
asked Mar 8 at 17:23
JavenJaven
174
add a comment |
class A: Timer
var myTimer: Timer!
class TimerTestViewController: UIViewController
var a = A()
override func viewDidLoad()
super.viewDidLoad()
a.myTimer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(timerRun), userInfo: nil, repeats: true)
RunLoop.current.add(a, forMode: RunLoop.Mode.common)
a.myTimer.fire()
Notice in RunLoop.current.add(a, forMode: .common) that i didn't add a.myTimer to runloop but “accidentally” added a to the runloop.
why does this code work at all?
ios swift nsrunloop
edited Mar 8 at 17:37
Rob
306k51576745
asked Mar 8 at 17:23
JavenJaven
174
add a comment |
class A: Timer
var myTimer: Timer!
class TimerTestViewController: UIViewController
var a = A()
override func viewDidLoad()
super.viewDidLoad()
a.myTimer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(timerRun), userInfo: nil, repeats: true)
RunLoop.current.add(a, forMode: RunLoop.Mode.common)
a.myTimer.fire()
Notice in RunLoop.current.add(a, forMode: .common) that i didn't add a.myTimer to runloop but “accidentally” added a to the runloop.
why does this code work at all?
ios swift nsrunloop
edited Mar 8 at 17:37
Rob
306k51576745
asked Mar 8 at 17:23
JavenJaven
174
class A: Timer
var myTimer: Timer!
class TimerTestViewController: UIViewController
var a = A()
override func viewDidLoad()
super.viewDidLoad()
a.myTimer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(timerRun), userInfo: nil, repeats: true)
RunLoop.current.add(a, forMode: RunLoop.Mode.common)
a.myTimer.fire()
Notice in RunLoop.current.add(a, forMode: .common) that i didn't add a.myTimer to runloop but “accidentally” added a to the runloop.
why does this code work at all?
ios swift nsrunloop
ios swift nsrunloop
edited Mar 8 at 17:37
Rob
306k51576745
asked Mar 8 at 17:23
JavenJaven
174
edited Mar 8 at 17:37
Rob
306k51576745
asked Mar 8 at 17:23
JavenJaven
174
edited Mar 8 at 17:37
Rob
306k51576745
edited Mar 8 at 17:37
Rob
306k51576745
edited Mar 8 at 17:37
Rob
306k51576745
306k51576745
asked Mar 8 at 17:23
JavenJaven
174
asked Mar 8 at 17:23
JavenJaven
174
asked Mar 8 at 17:23
JavenJaven
174
174
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
scheduledTimer has already added the Timer to a RunLoop and that's why the next line is not even necessary.
See Timer.scheduledTimer(timeInterval:target:selector:userInfo:repeats:)
Creates a timer and schedules it on the current run loop in the default mode.
The second line passes with a only because you have declared A to be a Timer which is probably an error:
// A should not be a Timer!
class A: Timer {
edited Mar 8 at 18:14
Alexander
32.6k55081
answered Mar 8 at 17:26
SulthanSulthan
99.1k16161204
Thanks a lot! You're very, very kind
– Javen
Mar 8 at 17:47
add a comment |
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1 Answer
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active
oldest
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
scheduledTimer has already added the Timer to a RunLoop and that's why the next line is not even necessary.
See Timer.scheduledTimer(timeInterval:target:selector:userInfo:repeats:)
Creates a timer and schedules it on the current run loop in the default mode.
The second line passes with a only because you have declared A to be a Timer which is probably an error:
// A should not be a Timer!
class A: Timer {
edited Mar 8 at 18:14
Alexander
32.6k55081
answered Mar 8 at 17:26
SulthanSulthan
99.1k16161204
Thanks a lot! You're very, very kind
– Javen
Mar 8 at 17:47
add a comment |
scheduledTimer has already added the Timer to a RunLoop and that's why the next line is not even necessary.
See Timer.scheduledTimer(timeInterval:target:selector:userInfo:repeats:)
Creates a timer and schedules it on the current run loop in the default mode.
The second line passes with a only because you have declared A to be a Timer which is probably an error:
// A should not be a Timer!
class A: Timer {
edited Mar 8 at 18:14
Alexander
32.6k55081
answered Mar 8 at 17:26
SulthanSulthan
99.1k16161204
Thanks a lot! You're very, very kind
– Javen
Mar 8 at 17:47
add a comment |
scheduledTimer has already added the Timer to a RunLoop and that's why the next line is not even necessary.
See Timer.scheduledTimer(timeInterval:target:selector:userInfo:repeats:)
Creates a timer and schedules it on the current run loop in the default mode.
The second line passes with a only because you have declared A to be a Timer which is probably an error:
// A should not be a Timer!
class A: Timer {
edited Mar 8 at 18:14
Alexander
32.6k55081
answered Mar 8 at 17:26
SulthanSulthan
99.1k16161204
scheduledTimer has already added the Timer to a RunLoop and that's why the next line is not even necessary.
See Timer.scheduledTimer(timeInterval:target:selector:userInfo:repeats:)
Creates a timer and schedules it on the current run loop in the default mode.
The second line passes with a only because you have declared A to be a Timer which is probably an error:
// A should not be a Timer!
class A: Timer {
edited Mar 8 at 18:14
Alexander
32.6k55081
answered Mar 8 at 17:26
SulthanSulthan
99.1k16161204
edited Mar 8 at 18:14
Alexander
32.6k55081
edited Mar 8 at 18:14
Alexander
32.6k55081
edited Mar 8 at 18:14
Alexander
32.6k55081
32.6k55081
answered Mar 8 at 17:26
SulthanSulthan
99.1k16161204
answered Mar 8 at 17:26
SulthanSulthan
99.1k16161204
answered Mar 8 at 17:26
SulthanSulthan
99.1k16161204
99.1k16161204
Thanks a lot! You're very, very kind
– Javen
Mar 8 at 17:47
add a comment |
Thanks a lot! You're very, very kind
– Javen
Mar 8 at 17:47
Thanks a lot! You're very, very kind
– Javen
Mar 8 at 17:47
Thanks a lot! You're very, very kind
– Javen
Mar 8 at 17:47
add a comment |
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