swift3

问题 I am working removing the duplicate Dictionaries in an array of Dictionaries in swift 3.0 The below is the let Dict1 : [String : String] = ["messageTo":"Madhu"] let Dict2 : [String : String] = ["messageTo":"Kiran"] let Dict3 : [String : String] = ["messageTo":"Raju"] var arrOfDict = [[String:String]]() arrOfDict.append(Dict1) arrOfDict.append(Dict2) arrOfDict.append(Dict1) arrOfDict.append(Dict3) arrOfDict.append(Dict2 print(arrOfDict) //prints [["messageTo": "Madhu"], ["messageTo": "Kiran"],

问题 I have a problem reading crash reports on FireBase, my reports look like: I've already followed these instructions to symbolicate the stacktrace, got the same result. I'm using Xcode 8 My app is made in Swift 3 Already wrote "FIRApp.configure()" in my appDelegate.didFinishLaunchingWithOptions method, did make it crash, deattach the debbuger, fix the error, re-run the app, got message "Crash successfully uploaded", etc... I'm using pods(pod 'Firebase' and pod 'Firebase/Crash') I see in the

问题 I am working on a project where I wants to shake the marker on google Map. I am using the custom marker icon to represent on the map. Like a head of person is shaking. I don't know how to do it and search a lot but didn't find any solution. 回答1: You can add a CAKeyframeAnimation or CABasicAnimation to your marker.iconView!.layer we add a UIView with a frame bigger than our UIImageView inside then we need to adjust the anchor point of your UIImageView to bottom in vertical and horizontally

问题 I am creating an iOS app and use Carthage to build external libraries. Since the libraries I use are currently both Swift 2 and Swift 3 I am in a bit of a squeeze. Thus I want to have one Swift 2 branch and one Swift 3 branch for development and then merge them when the libraries are all Swift 3 compatible. However, I am not able to select which toolchain for build for with Carthage (version 0.18). Here is the contents of my Cartfile: # Swift 2 libraries github "stephencelis/SQLite.swift" ~>

问题 I've searched for this issue and there are many answers available but none are solving. I've defined parameters as: let parameters = [ "name": username, "mobile": "", "email": email, "password": "", "blood_donor": "0", "registration_id": defaults.string(forKey: "FCMToken"), "platform": platform, "appID": "3" ] And after that when I send the request: Alamofire.request(url, method: .post, parameters: parameters, encoding: URLEncoding(), headers: headers).responseJSON { response in So I get a

问题 I have a struct that I am using to call out to the iTunes API. But when ever I run it myURL variable is never getting set, it's always nil . Not sure what I am doing wrong: let myDefaultSession = URLSession(configuration: .default) var myURL: URL? var myDataTask: URLSessionTask? struct APIManager { func getJSON(strURL: String) { myURL = URL(string: strURL) var dictReturn: Dictionary<String, Any> = [:] //cancel data task if it is running myDataTask?.cancel() print(myURL!) //<----Always nil } }

问题 I want to call the Posix socket functions socket and bind from Swift. socket is pretty easy—it takes Int32 s, but bind is causing a problem, because I have a sockaddr_in pointer, but it wants a sockaddr pointer. In C, this would be a cast, like: bind(sock, (struct sockaddr *)&sockAddress, sizeof(sockAddress)) Here's an attempt in Swift: let sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) var sockAddress = sockaddr_in() bind(sock, &sockAddress, UInt32(MemoryLayout<sockaddr_in>.size)) The bind

问题 This comparison worked in Swift 2 but doesn't anymore in Swift 3: let myStringContainsOnlyOneCharacter = mySting.rangeOfComposedCharacterSequence(at: myString.startIndex) == mySting.characters.indices How do I compare Range and DefaultBidirectionalIndices? 回答1: From SE-0065 – A New Model for Collections and Indices In Swift 2, collection.indices returned a Range<Index> , but because a range is a simple pair of indices and indices can no longer be advanced on their own, Range<Index> is no

问题 I'm using a UICollectionView with only one section. Here's some visualization: [ x x x ] [ x x x ] [ x x ] If the last row in the UICollectionView does not have all 3 cells filled, I'd like to center those cells like so: [ x x x ] [ x x x ] [ x x ] I've tried to implement solutions from the following places: How to center horizontally UICollectionView Cells? How to center align the cells of a UICollectionView? However, the solutions shifts all the cells, and I'd like to only shift the LAST

问题 This question already has answers here : TableView reloadData vs. beginUpdates & endUpdates (3 answers) Closed 2 years ago . What is the difference between tableView.reloadData() and tableView.reloadRows(at: [IndexPath],with: .none) ? I know that cells will reload everything after tableView.reloadData() I tried the following. cell.count = 2 indexPath = [0,0] and [0,1] tableView.reloadRows(at: [[0,0] as IndexPath],with: .none) tableView.reloadRows(at: [[0,1] as IndexPath],with: .none) However,