My internet connection is slow. I don't want to download 11 GB Xcode. Could someone help me? Better find a good place where you can use broadband internet. The recent Xcode works with tight communications with Apple's servers. You will meet many other messages and cannot run or distribute your app unless you do things in the right way. Generally, installing Xcode through More Download pages - https://developer.apple.com/download/more/ may work in a little less stable communications environment, but you need to download 11GB Xcode and many more hidden components.

Writing an initialization code of Views in Button actions does not make sense. Write a code to show other views using NavigationLink or sheet or something else, and change the @State variable for it.

(Sorry, I was missing the word macOS.) You can find some old threads for macOS. Some examples: https://developer.apple.com/forums/thread/14485 Or https://stackoverflow.com/questions/28139294/how-does-one-display-a-new-view-controller-in-the-same-mac-window Can't you find anything useful in any of them?

Have you tried installing the latest Xcode (12.5) from the More Downloads page - https://developer.apple.com/download/more/?

maybe someone can think about developing one. Unfortunately, there are many agreements or contracts between Apple and us developers. So, most developers believe that third party developers cannot develop a fully functional IDE on iPhone or iPad. You can write a feature request to Apple using the Feedback Assistant - https://developer.apple.com/bug-reporting/. You may already know and may not think it as a fully functional development tool, but Swift Playgrounds is a good tool to learn programming in Swift.

MIDICompletionProc is a typealias of a closure type, as shown in the doc - https://developer.apple.com/documentation/coremidi/midicompletionproc. typealias MIDICompletionProc = (UnsafeMutablePointerMIDISysexSendRequest) - Void You may need to pass a global function or a closure of @convention(c). completionRefCon is any type of pointer which points to some stable address while MIDI process is running. Or it can be nil. So, for example, you can write something like this: // Define a global function, somewhere outside any classes func handleMIDISysexSendRequestCompletion(_ request: UnsafeMutablePointerMIDISysexSendRequest) { //... } class SomeClass { //... func someFunc(...) { //... var request = MIDISysexSendRequest( destination: endPoint, data: dataPointer, bytesToSend: dataSize, complete: isComplete, reserved: (0,0,0), completionProc: handleMIDISysexSendRequestCompletion, completionRefCon: nil ) let result = MIDISendSysex(&request) print(result) //... } }

Please show the definition of the protocol Handler, and show the precise code to represent what you did. With shown a code with bunch of syntax errors, it is hard to say what's causing the issue. And please do not forget to use Code block (icon ``) of this site when showing some code.

Ok, but I am still wondering about how to get the things to trigger if setIconPurchased = true Maybe you need to clarify when you expect setIconPurchased gets true and when if setIconPurchased is executed.

However, the part with the if runs before it can be purchased Please clarify: Where is the part with the if? When is the time it can be purchased? In my opinion, your code is too complex than it should be so just showing the code does not explain enough.

Would you like me to give you my project so you can run it? Thank you for your proposal, but as far as I see the code you have already shown, the whole project would not clarify what I want to know. The if I am talking about is on line 15 and it is supposed to prompt to get purchased if not purchased already If you say the if on line 15 is not working as you expect, why are you setting setIconPurchased to true before it is ready?

Once an icon gets purchased, setIconPurchased gets set to true, and then if it equals true it does more actions. Then your code is quite right. Please go on with your current code.

With this line: var randomSeq: [Int] = [] You initialize randomSeq with a zero-length Array. So, any index including 0 would cause Index out of range. In Swift, accessing an Array with subscript does not automatically extend the Array, and may cause Index out of range. I guess, you may need to write something like this: import Foundation let maxLevel: Int = 99 var randomSeq: [Int] = [] struct NumGen { static func generate() { //randomSeq.removeAll() for i in 1...maxLevel { randomSeq.append(Int.random(in: 1...4)) print(i) } } }

Can you show your example kml?

Thanks, I could have downloaded the xml file. A bit long, but can you try this? po overlays.map {$0 as! MKPolyline}.map {Array(UnsafeBufferPointer(start:$0.points(),count:$0.pointCount))}

the numbers below are much much larger?  MKPolyline converts CLLocationCoordinate2D (which holds latitudes and longitudes) into MKMapPoint. I am not sure if the shown values are too large or sort of invalid as MKMapPoint.