Advanced Functions Archives - helpMeCodeSwift.com

Saving and Loading Text in Swift

Here is a full solution on saving and loading text with Swift 2.0, current example is for saving and loading high score in a game.

func getDocumentsURL() -> NSURL {
let documentsURL = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)[0]
 return documentsURL
}

func fileInDocumentsDirectory(filename: String) -> String {
    
    let fileURL = getDocumentsURL().URLByAppendingPathComponent(filename)
    return fileURL.path!
    
}

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func getDocumentsURL() -> NSURL {

let documentsURL = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)[0]

return documentsURL

}

func fileInDocumentsDirectory(filename: String) -> String {

let fileURL = getDocumentsURL().URLByAppendingPathComponent(filename)

return fileURL.path!

}

Using those 2 functions we can now declare a variable to store a path to our highscore text file:

let scoreSavePath = fileInDocumentsDirectory("highScore.txt")

1	let scoreSavePath = fileInDocumentsDirectory("highScore.txt")

Here is how we would load text […]

Generating UIButtons from a loop, part 2

Hi, creating a second part of the tutorial as some folks wanted to do this trick with a few variations. ( link to part I ) As a start a Navigation controller got involved 🙂 So you end up with a problem where buttons would disappear as you go back and forth. Solution for this […]

Generating UIButtons from a loop

This is a very useful technique and it’s pretty straight forward. Let’s say we have an array of items or heroes and we want to dynamically create buttons that will do something linked to the hero/item selected. One example is if you have an array of saved games and you want to generate buttons to […]

Defensive Driving tips

Since car accidents are one of the most common causes of injury and fatality among young people, with more than 5 million accidents logged each year, it is vital to learn defensive driving skills when driving a vehicle. You may know how to drive, but is that really enough? Apart from being a skilled driver, […]

Creating a Rotate Gesture

Here is a complete Rotate Gesture example: We have 2 things – a handle and the gesture itself that uses the handle.. Here is the gesture:

func createRotateGestureRecognizer(targetView:UIImageView) {
var rotateGesture = UIRotationGestureRecognizer(target: self, action: ("handleRotate:"))
targetView.addGestureRecognizer(rotateGesture)
rotateGesture.delegate = self
}

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func createRotateGestureRecognizer(targetView:UIImageView) {

var rotateGesture = UIRotationGestureRecognizer(target: self, action: ("handleRotate:"))

targetView.addGestureRecognizer(rotateGesture)

rotateGesture.delegate = self

}

("handleRotate:")

1	("handleRotate:")

is what points to the Handle ( make sure you don’t misspell this). Here is the actual handle:

 func handleRotate(recognizer : UIRotationGestureRecognizer) {
recognizer.view!.transform = CGAffineTransformRotate(recognizer.view!.transform, recognizer.rotation)
recognizer.rotation = 0
var label = recognizer.view as UIImageView  // creating a new UIImageView out of the rotation
    if recognizer.state == UIGestureRecognizerState.Changed {
                     hoverShadow(label) // add some Extra Shadow when we are rotating the new ImageView
               }
    else {
                     shadow(label) // return to the original Shadow when not moving
               }
}

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func handleRotate(recognizer : UIRotationGestureRecognizer) {

recognizer.view!.transform = CGAffineTransformRotate(recognizer.view!.transform, recognizer.rotation)

recognizer.rotation = 0

var label = recognizer.view as UIImageView // creating a new UIImageView out of the rotation

if recognizer.state == UIGestureRecognizerState.Changed {

hoverShadow(label) // add some Extra Shadow when we are rotating the new ImageView

}

else {

shadow(label) // return to the original Shadow when not moving

}