At a Glance

Sensitive library is a new way to work with gestures in iOS. Approach is very similar to Android's onClick handler for View subclasses. Forget about targets and actions of primitive UIGestureRecognizers. Instead of that, you can simply use blocks with methods like onTap, onPinch, onSwipe, etc. Each UIView object includes those methods via special extension. That's all that you should know to start. For details, see Usage section.

How To Get Started

• Copy content of Sensitive folder to your project.

or

• Use Sensitive cocoapod.

Requirements

• iOS 9.0 and later
• Xcode 9.0 and later
• Swift 4

Usage

let view = UIView()

/*
 * Add tap gesture recognizer without configuration block to view.
 */

view.onTap { (tapGestureRecognizer) in
    // Handle tap on view
    tapGestureRecognizer.view!.backgroundColor = .green
}

/*
 * Add tap gesture recognizer with configuration block to view.
 */

view.onTap(when: .always, handle: { (tapGestureRecognizer) in
    // Handle tap on view
    tapGestureRecognizer.view!.backgroundColor = .green
}) { (tapGestureRecognizer) in
    // Configure gesture recognizer
    tapGestureRecognizer.numberOfTouchesRequired = 1
    tapGestureRecognizer.numberOfTapsRequired = 2
}

/*
 * Add one-time tap gesture recognizer with configuration block to view.
 * Gesture recognizer will be removed from view after first recognition.
 */

view.onTap(when: .once, handle: { (tapGestureRecognizer) in
    // Handle tap on view
    tapGestureRecognizer.view!.backgroundColor = .green
}) { (tapGestureRecognizer) in
    // Configure gesture recognizer
    tapGestureRecognizer.numberOfTouchesRequired = 1
    tapGestureRecognizer.numberOfTapsRequired = 2
}

/*
 * Set number of times to handle tap gesture in view.
 * Gesture recognizer will be removed from view after 10 recognitions.
 */

view.onTap(when: .times(count: 10), handle: { (tapGestureRecognizer) in
    // Handle tap on view
    tapGestureRecognizer.view!.backgroundColor = .green
}) { (tapGestureRecognizer) in
    // Configure gesture recognizer
    tapGestureRecognizer.numberOfTouchesRequired = 1
    tapGestureRecognizer.numberOfTapsRequired = 2
}

/*
 * Add long press gesture recognizer without configuration block to view.
 */

view.onLongPress { (longPressGestureRecognizer) in
    // Handle long press on view
    tapGestureRecognizer.view!.backgroundColor = .green
}

/*
 * Add long press gesture recognizer with configuration block to view.
 */

view.onLongPress(when: .always, handle: { (longPressGestureRecognizer) in
    // Handle long press on view
    tapGestureRecognizer.view!.backgroundColor = .green
}) { (longPressGestureRecognizer)
    // Configure gesture recognizer
    longPressGestureRecognizer.numberOfTouchesRequired = 1
}

/*
 * Add one-time long press gesture recognizer with configuration block to view.
 * Gesture recognizer will be removed from view after first recognition.
 */

view.onLongPress(when: .once, handle: { (longPressGestureRecognizer) in
    // Handle long press on view
    tapGestureRecognizer.view!.backgroundColor = .green
}) { (longPressGestureRecognizer)
    // Configure gesture recognizer
    longPressGestureRecognizer.numberOfTouchesRequired = 1
}

/*
 * Set number of times to handle long press gesture in view.
 * Gesture recognizer will be removed from view after 10 recognitions.
 */

view.onLongPress(when: .times(count: 10), handle: { (longPressGestureRecognizer) in
    // Handle long press on view
    tapGestureRecognizer.view!.backgroundColor = .green
}) { (longPressGestureRecognizer)
    // Configure gesture recognizer
    longPressGestureRecognizer.numberOfTouchesRequired = 1
}

/*
 * Add pan gesture recognizer without configuration block to view.
 */

view.onPan { (panGestureRecognizer) in
    // Handle pan gesture on view here...
}

/*
 * Add pan gesture recognizer with configuration block to view.
 */

view.onPan(when: .always, handle: { (panGestureRecognizer) in
    // Handle pan gesture on view here...
}) { (longPressGestureRecognizer)
    // Configure pan gesture recognizer here...
}

/*
 * Add one-time pan gesture recognizer with configuration block to view.
 * Gesture recognizer will be removed from view after first recognition.
 */

view.onPan(when: .once, handle: { (panGestureRecognizer) in
    // Handle pan gesture on view here...
}) { (longPressGestureRecognizer)
    // Configure pan gesture recognizer here...
}

/*
 * Set number of times to handle pan gesture in view.
 * Gesture recognizer will be removed from view after 10 recognitions.
 */

view.onPan(when: .times(count: 10), handle: { (panGestureRecognizer) in
    // Handle pan gesture on view here...
}) { (longPressGestureRecognizer)
    // Configure pan gesture recognizer here...
}

/*
 * Add pinch gesture recognizer without configuration block to view.
 */

view.onPinch { (pinchGestureRecognizer) in
    // Handle pinch gesture on view here...
}

/*
 * Add pinch gesture recognizer with configuration block to view.
 */

view.onPinch(when: .always, handle: { (pinchGestureRecognizer) in
    // Handle pinch gesture on view here...
}) { (pinchGestureRecognizer) in
    // Configure pinch gesture recognizer here...
}

/*
 * Add one-time pinch gesture recognizer with configuration block to view.
 * Gesture recognizer will be removed from view after first recognition.
 */

view.onPinch(when: .once, handle: { (pinchGestureRecognizer) in
    // Handle pinch gesture on view here...
}) { (pinchGestureRecognizer) in
    // Configure pinch gesture recognizer here...
}

/*
 * Set number of times to handle pinch gesture in view.
 * Gesture recognizer will be removed from view after 10 recognitions.
 */

view.onPinch(when: .times(count: 10), handle: { (pinchGestureRecognizer) in
    // Handle pinch gesture on view here...
}) { (pinchGestureRecognizer) in
    // Configure pinch gesture recognizer here...
}

/*
 * Add rotation gesture recognizer without configuration block to view.
 */

view.onRotation { (rotationGestureRecognizer) in
    // Handle rotation gesture on view here...
}

/*
 * Add rotation gesture recognizer with configuration block to view.
 */

view.onRotation(when: .always, handle: { (rotationGestureRecognizer) in
    // Handle rotation gesture on view here...
}) { (rotationGestureRecognizer) in
    // Configure rotation gesture recognizer here...
}

/*
 * Add one-time rotation gesture recognizer with configuration block to view.
 * Gesture recognizer will be removed from view after first recognition.
 */

view.onRotation(when: .once, handle: { (rotationGestureRecognizer) in
    // Handle rotation gesture on view here...
}) { (rotationGestureRecognizer) in
    // Configure rotation gesture recognizer here...
}

/*
 * Set number of times to handle rotation gesture in view.
 * Gesture recognizer will be removed from view after 10 recognitions.
 */

view.onRotation(when: .times(count: 10), handle: { (rotationGestureRecognizer) in
    // Handle rotation gesture on view here...
}) { (rotationGestureRecognizer) in
    // Configure rotation gesture recognizer here...
}

/*
 * Add swipe gesture recognizer without configuration block to view.
 */

view.onSwipe { (swipeGestureRecognizer) in
    // Handle swipe gesture on view here...
}

/*
 * Add swipe gesture recognizer with configuration block to view.
 */

view.onSwipe(when: .always, handle: { (swipeGestureRecognizer) in
    // Handle swipe gesture on view here...
}) { (swipeGestureRecognizer) in
    // Configure swipe gesture recognizer here...
    swipeGestureRecognizer.direction = .Right
}

/*
 * Add one-time swipe gesture recognizer with configuration block to view.
 * Gesture recognizer will be removed from view after first recognition.
 */

view.onSwipe(when: .once, { (swipeGestureRecognizer) in
    // Handle swipe gesture on view here...
}) { (swipeGestureRecognizer) in
    // Configure swipe gesture recognizer here...
    swipeGestureRecognizer.direction = .Right
}

/*
 * Set number of times to handle swipe gesture in view.
 * Gesture recognizer will be removed from view after 10 recognitions.
 */

view.onSwipe(when: .times(count: 10), { (swipeGestureRecognizer) in
    // Handle swipe gesture on view here...
}) { (swipeGestureRecognizer) in
    // Configure swipe gesture recognizer here...
    swipeGestureRecognizer.direction = .Right
}

/*
 * Add swipe up gesture recognizer without configuration block to view.
 */

circleView.onSwipe(to: .up) { (swipeGestureRecognizer) in
    // Handle swipe gesture on view here...
}

/*
 * Add swipe right gesture recognizer without configuration block to view.
 */

circleView.onSwipe(to: .right) { (swipeGestureRecognizer) in
    // Handle swipe gesture on view here...
}

/*
 * Add swipe down gesture recognizer without configuration block to view.
 */

circleView.onSwipe(to: .down) { (swipeGestureRecognizer) in
    // Handle swipe gesture on view here...
}

/*
 * Add swipe left gesture recognizer without configuration block to view.
 */

circleView.onSwipe(to: .left) { (swipeGestureRecognizer) in
    // Handle swipe gesture on view here...
}

/*
 * Add screen edge pan gesture recognizer without configuration block to view.
 */

view.onScreenEdgePan { (screenEdgePanGestureRecognizer) in
    // Handle screen edge pan gesture on view here...
}

/*
 * Add screen edge pan gesture recognizer with configuration block to view.
 */

view.onScreenEdgePan(when: .always, handle: { (screenEdgePanGestureRecognizer) in
    // Handle screen edge pan gesture on view here...
}) { (screenEdgePanGestureRecognizer) in
    // Configure screen edge pan gesture recognizer here...
}

/*
 * Add one-time screen edge pan gesture recognizer with configuration block to view.
 * Gesture recognizer will be removed from view after first recognition.
 */

view.onScreenEdgePan(when: .once, handle: { (screenEdgePanGestureRecognizer) in
    // Handle screen edge pan gesture on view here...
}) { (screenEdgePanGestureRecognizer) in
    // Configure screen edge pan gesture recognizer here...
}

/*
 * Set number of times to handle screen edge pan gesture in view.
 * Gesture recognizer will be removed from view after 10 recognitions.
 */

view.onScreenEdgePan(when: .times(count: 10), handle: { (screenEdgePanGestureRecognizer) in
    // Handle screen edge pan gesture on view here...
}) { (screenEdgePanGestureRecognizer) in
    // Configure screen edge pan gesture recognizer here...
}

/*
 * Add touch gesture recognizer without configuration block to view.
 */

view.onTouch { (touchGestureRecognizer) in
    // Handle touch gesture on view here...
}

/*
 * Add touch gesture recognizer with configuration block to view.
 */

view.onTouch(when: .always, handle: { (touchGestureRecognizer) in
    // Handle touch gesture on view here...
}) { (touchGestureRecognizer) in
    // Configure touch gesture recognizer here...
}

/*
 * Add one-time touch gesture recognizer with configuration block to view.
 * Gesture recognizer will be removed from view after first recognition.
 */

view.onTouch(when: .once, handle: { (touchGestureRecognizer) in
    // Handle touch gesture on view here...
}) { (touchGestureRecognizer) in
    // Configure touch gesture recognizer here...
}

/*
 * Set number of times to handle touch gesture in view.
 * Gesture recognizer will be removed from view after 10 recognitions.
 */

view.onTouch(when: .times(count: 10), handle: { (touchGestureRecognizer) in
    // Handle touch gesture on view here...
}) { (touchGestureRecognizer) in
    // Configure touch gesture recognizer here...
}

Also, you can use gesture recognizers of these types:

• Sensitive.TapGestureRecognizer
• Sensitive.LongPressGestureRecognizer
• Sensitive.PanGestureRecognizer
• Sensitive.PinchGestureRecognizer
• Sensitive.RotationGestureRecognizer
• Sensitive.SwipeGestureRecognizer
• Sensitive.ScreenEdgePanGestureRecognizer
• Sensitive.TouchGestureRecognizer

Each of those gesture recognizers (except TouchGestureRecognizer is a subclass of gesture recognizer from iOS SDK. For example, Sensitive.TapGestureRecognizer is subclassed from UITapGestureRecognizer. The purpose of subclasses is to use closure as parameter instead of target-action approach. For example, this is how you initialize UITapGestureRecognizer:

let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(SomeViewController.didTapWithGestureRecognizer(_:)))

And this is how you should use Sensitive.TapGestureRecognizer:

let tapGestureRecognizer = TapGestureRecognizer { (tapGestureRecognizer) in
    // Do something...
}

Quite simple, isn't it?

All other gesture recognizers can be initialized similar way.

TouchGestureRecognizer has no analogues in iOS SDK. The purpose of TouchGestureRecognizer is to handle any touches on the view (tap, pan, pinch, swipe, rotation, etc). You can initialize TouchGestureRecognizer instance similar to this way:

let touchGestureRecognizer = TouchGestureRecognizer { (touchGestureRecognizer) in
    NSLog("Recognized gesture with \(touchGestureRecognizer.numberOfTouches) touches")
}

/*
 * Now let's tell to gesture recognizer to handle gestures with one touch only.
 */

touchGestureRecognizer.numberOfTouchesRequired = .equalTo(count: 1)

/*
 * Or handle gestures with 1 or 3 touches only.
 */

touchGestureRecognizer.numberOfTouchesRequired = .predicate(block: { (numberOfTouches) -> Bool in
    return (numberOfTouches == 1)
        || (numberOfTouches == 3)
})


/*
 * Or handle gestures with any number of touches.
 */

touchGestureRecognizer.numberOfTouchesRequired = .any

License

Sensitive is available under the MIT license. See the LICENSE file for more info.