swift3

问题 Using Swift, I'm trying to take a list of numbers input in a text view in an app and create a sum of this list by extracting each number for a grade calculator. Also the amount of values put in by the user changes each time. An example is shown below: String of: 98,99,97,96... Trying to get: 98+99+97+96... Please Help! Thanks 回答1: Use components(separatedBy:) to break up the comma-separated string. Use trimmingCharacters(in:) to remove spaces before and after each element Use Int() to convert

问题 Getting a new warning in xcode 8 beta 3. What is wrong with this syntax, or is there a bug in xcode? SwiftyJSON.swift:772:35: Expected ',' joining parts of a multi-clause condition if let errorValue = error where errorValue.code == ErrorNotExist { } 回答1: It seems this feature has been included: 0099-conditionclauses.md Try this: if let errorValue = error, errorValue.code == ErrorNotExist { } 来源： https://stackoverflow.com/questions/38446598/xcode-8-beta-3-expected-joining-parts-of-a-multi

问题 Getting a new warning in xcode 8 beta 3. What is wrong with this syntax, or is there a bug in xcode? SwiftyJSON.swift:772:35: Expected ',' joining parts of a multi-clause condition if let errorValue = error where errorValue.code == ErrorNotExist { } 回答1: It seems this feature has been included: 0099-conditionclauses.md Try this: if let errorValue = error, errorValue.code == ErrorNotExist { } 来源： https://stackoverflow.com/questions/38446598/xcode-8-beta-3-expected-joining-parts-of-a-multi

问题 I am having trouble trying to figure this topic out. Like the topic, How do I delete an element that contains a letter in Array. This is the code I have so far. let newline = "\n" let task = Process() task.launchPath = "/bin/sh" task.arguments = ["-c", "traceroute -nm 18 -q 1 8.8.8.8"] let pipe = Pipe() task.standardOutput = pipe task.launch() let data = pipe.fileHandleForReading.readDataToEndOfFile() let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue) as! String var

问题 I am updating my project to Swift 3. Most all has gone well, but I cannot figure the below out. I believe I have found how to correct the first of the two errors, but cannot figure out the second one "i = i + 1" as I am getting the error "Cannot assign to value: 'i' is a 'let' constant" I hired someone to do the coordinates on my app, so this is why I am not so accustomed to these types of errors. I have created 200 polygon regions and the below this is meant to take the users current

问题 The following code never calls the callback for export. The export session is created just fine. I see no error, and no progress. The CPU is 0%. I see no exceptions. Status is 1 (in progress), the progress is 0, the error is nil. The video plays in the gallery. I can successfully get an image for the video. I have extracted the code into a single UIViewController for testing, see below: I tested using iOS10.1.1 with a video I recorded on the iPad. import UIKit import Photos class

问题 func application(application: UIApplication, openURL url: NSURL, sourceApplication: String?, annotation: AnyObject) -> Bool { return FBSDKApplicationDelegate.sharedInstance().application(application, openURL: url, sourceApplication: sourceApplication, annotation: annotation) } 回答1: In swift 3.0 , the method signature for openURL is: func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool { return FBSDKApplicationDelegate

问题 I m having blank data in another view controller, I can pass data between table view controller but I m having a problem to parse data from login method and pass access token or username from JSON? @IBOutlet weak var username_textfield: UITextField! @IBOutlet weak var password_textfield: UITextField! var logindata : [Login] = [] var myResponse : JSON = nil func getlogin(){ let headers = [ "Content-Type": "application/x-www-form-urlencoded" ] let parameters = [ "UserName": username_textfield

问题 I m having blank data in another view controller, I can pass data between table view controller but I m having a problem to parse data from login method and pass access token or username from JSON? @IBOutlet weak var username_textfield: UITextField! @IBOutlet weak var password_textfield: UITextField! var logindata : [Login] = [] var myResponse : JSON = nil func getlogin(){ let headers = [ "Content-Type": "application/x-www-form-urlencoded" ] let parameters = [ "UserName": username_textfield

问题 I am trying to get my macOS Cocoa Application Xcode project to play some video when I feed it a specified URL. To simplify the question lets just use an empty Xcode project. I want to achieve the same level of control as I am able to get using AVPlayerViewController() in my iOS Single View Application . Within that app I am currently using the solution offered here. However, only the second example works in my macOS Cocoa Application when adapted like so : import Cocoa import AVFoundation