swift-playground

问题 This question already has answers here : iOS Playground doesn't show UI preview (8 answers) Closed 2 years ago . I can't figure out how to create and display a live view in an Xcode 8/Swift 3 Playground. If Apple has comprehensive documentation on playgrounds and live views, I can't find it, and all my searching online reveals either tutorials on Xcode 7 or the new iPad playgrounds. The few examples I have found set up Mac OS views, which is not what I want (I work mostly in iOS, so the code

问题 I'm a complete swift noob. Using this code in xcode I get the result I need. I created a command line binary "menubar" that takes several arguments. I normally run it in the terminal "/bin/menubar getip", "/bin/menubar/getuser". I want to create a function based on the following working code. import Cocoa import Foundation var task:NSTask = NSTask() var pipe:NSPipe = NSPipe() task.launchPath = "/bin/menubar" task.arguments = ["getip"] task.standardOutput = pipe task.launch() var handle = pipe

问题 I am running into a strange issue where Alamofire.request(.GET) statement in my playground gets executed after some delay in the playground Setup: I followed the following link to import Alamofire framework to test networking requests in xcode playground. This is the code I have in my playground. And when I look at the logs of my webserver the logs get updated after almost ~few minutes delay. I have verfied that it is not the log process that is causing delay. Making same http request using

问题 rangeOfComposedCharacterSequenceAtIndex works differently in playground and in App, in playground mentioned below code returns as expected (location: 0, length: 4) let flagRange = "🇳🇴".rangeOfComposedCharacterSequenceAtIndex(0) But in application it returns (location: 0, length: 2) 来源： https://stackoverflow.com/questions/32831455/different-results-of-rangeofcomposedcharactersequenceatindex-in-playground-and-i

问题 I'm trying to create a UIView in Swift Playground (in Xcode). My goal is to create the largest possible view. The current size is 1024 x 768. And if I try to increase the width or height, the view (when played in Live View) actually gets smaller which I think is happening so that it scales down to the window. But when I look at the Live View on 15-inch Macbook, there's a lot of space in the Live View -- the width can be increased, but I don't know how to increase it such that it actually

问题 How to convert an Array to a Set using Xcode Playground? We tried: let a = Array(0 ..< 1000) let s = Set(a) This produces at run time: Fatal error: Only BidirectionalCollections can be advanced by a negative amount Issue happening with both Xcode 9.4 Playground and Xcode 10 beta 3 Playground. 回答1: This is fixed in Xcode 10 beta 6 and newer, so I've updated the workaround to only apply for older swift versions. For older Xcode versions (like Xcode 9.4), this may be caused by the number of

问题 I'm trying to verify/validate url but when I do it always opens safari. Any of you know how can accomplish this without open safari. Here is my code: func validateUrl (urlString: String?) -> Bool { let url:NSURL = NSURL(string: urlString!)! if NSWorkspace.sharedWorkspace().openURL(url) { return true } return false } print (validateUrl("http://google.com")) I'll really appreciate your help. 回答1: There's two things to check: if the URL itself is valid, and if the server responds without error.

问题 I have already converted the .mlmodel to .mlmodelc , and I have put it in the resources folder. Im using Vision framework and MNIST model, following this tutorial (https://www.youtube.com/watch?v=bOg8AZSFvOc), but using swift playground. What am i missing? (im using .playground files, not .playgroundbook files) line of code: guard let visionModel = try? VNCoreMLModel(for: MNIST().modelc) else {fatalError("can not load Vision ML model")} Error message: use of undefined identifier 'MNIST'

问题 I've spent hours trying to simply gain access to image data in my Swift Playground. I've followed many tutorials that recommend adding a resource folder as a sibling dir in the dir. your playground is in. Or to drag images into the Resources folder in the playground Navigator. Nothing has worked. What do I have to do to load an image view in playground? 回答1: I solved this problem on my side when I import PlaygroundSupport mark Resources Folder and tap + icon Choose Add files to 'Resources'

问题 Swift in playground on Mac OS. When the user clicks in a UItextfield, a keyboard spawns but it is very large compared to the view and only the first few keys are available. minimal example: import UIKit import PlaygroundSupport class TesterViewController : UIViewController { var testTextField : UITextField! override func loadView() { let view = UIView() view.backgroundColor = .white testTextField = UITextField() testTextField.borderStyle = .roundedRect testTextField.text = "" view.addSubview