How do I get a CGPoint from a touchesBegan event? - ios

Question

In my AppDelegate, I want to detect when a tap event has been made to the status bar. In order to do so, I need to get the CGPoint from the event. How do I get it from this code?
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
super.touchesBegan(touches, withEvent: event)
let location = // how to get a CGPoint ????
let statusBarFrame = UIApplication.sharedApplication().statusBarFrame
if CGRectContainsPoint(statusBarFrame, location){
print("Status bar touched")
}else{
print("Not touched")
}
}

Answer 1

You're using Swift 2; you could retrieve the tap location as follows:
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent)
{
if let touch = touches.first as? UITouch
{
//The view you would like to get the tap location from.
let tapPoint = touch.locationInView(self.view)
let statusBarFrame = UIApplication.sharedApplication().statusBarFrame
if CGRectContainsPoint(statusBarFrame, tapPoint)
{
print("Status bar touched")
}
else
{
print("Not touched")
}
}
}

Answer 2

A UITouch object has a method locationInView: that allows you to find the location of a touch in a particular view. From the docs:
Returns the current location of the receiver in the coordinate system of the given view.
The view object in whose coordinate system you want the touch located. A custom view that is handling the touch may specify self to get the touch location in its own coordinate system. Pass nil to get the touch location in the window’s coordinates.
So try:
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
super.touchesBegan(touches, withEvent: event)
guard let touch = touches.first else {
return
}
let location = touch.locationInView(nil)
let statusBarFrame = UIApplication.sharedApplication().statusBarFrame
if CGRectContainsPoint(statusBarFrame, location) {
print("Status bar touched")
} else {
print("Not touched")
}
}
This works regardless of device orientation

Answer 3

Swift 5.1
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesBegan(touches, with: event)
guard let touch = touches.first else {
return
}
let location = touch.location(in: nil)
}

Answer 4

You'd have to have a view that you touched. If you've managed to get your app delegate to receive touch events, you could try getting the locationInView: using the app delegates window.