Title: Theory / Important / CS / Programming / Objective-C / Library / UIKit / Control / Track

Variable: control.tracking
Meaning: whether the control is currently tracking touch events.
Page: https://developer.apple.com/documentation/uikit/uicontrol/1618245-state?language=objc
Language: Objective-C
Variables: UIControl control

Variable: control
.touchInside
Meaning: whether a tracked touch event is currently inside the control’s bounds.
Page: https://developer.apple.com/documentation/uikit/uicontrol/1618245-state?language=objc
Language: Objective-C
Variables: UIControl control

Instruction: [control
  cancelTrackingWithEvent:event
]
Page: https://developer.apple.com/documentation/uikit/uicontrol/1618245-state?language=objc
Effect: Tells the control to cancel tracking related to event.
Language: Objective-C
Variables: UIControl control

Instruction: [control
  endTrackingWithTouch:touch
  withEvent:event
]
Page: https://developer.apple.com/documentation/uikit/uicontrol/1618245-state?language=objc
Effect: Called when a touch event associated with the control ends.
Language: Objective-C
Variables: UIControl control

Instruction: [control
  continueTrackingWithTouch:touch
  withEvent:event
]
Page: https://developer.apple.com/documentation/uikit/uicontrol/1618245-state?language=objc
Effect: Called when a touch event for the control updates.
Language: Objective-C
Variables: UIControl control

Instruction: [control
  beginTrackingWithTouch:touch
  withEvent:event
]
Page: https://developer.apple.com/documentation/uikit/uicontrol/1618245-state?language=objc
Effect: Called when a touch event for the control updates.
Language: Objective-C
Variables: UIControl control