Advanced Functions Archives - helpMeCodeSwift.com

Delay Function in Swift 3.0

Since thing have changed a lot for Swift 3.0 , here is a quick tip on how to create a delayed function with the new API. Add this function to your project:

func delay(time: Double, closure:()->()) {
        
        DispatchQueue.main.after(when: .now() + time) {
            closure()
        }
        
 }

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func delay(time: Double, closure:()->()) {

DispatchQueue.main.after(when: .now() + time) {

closure()

}

Then if you want to launch anything after a delay, you use it like so:

delay(time: 10) {
            
            print("hello")
}

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delay(time: 10) {

print("hello")

}

That’s all 🙂 Cheers!

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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 […]

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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 […]

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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 […]

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Creating a Tap Gesture

Hi, here is a basic example of creating and applying a tap gesture. This is one of the simpler gestures and it’s fairly easy to use. First we are going to create the Gesture Recognizer, using the built in UITapGestureRecognizer function provided by Apple.

let tapRecognizer = UITapGestureRecognizer()
        tapRecognizer.addTarget(self, action: "handleTap")

1 2	let tapRecognizer = UITapGestureRecognizer() tapRecognizer.addTarget(self, action: "handleTap")

Please make sure the

action: "action_name"

1	action: "action_name"

matches the function name below. […]

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