Swift
Swift is a general-purpose, open-source programming language developed by Apple Inc. for their platforms and Linux. Use the tag only for questions about language features, or requiring code in Swift. Use the tags [ios], [osx], [watch-os], [tvos], [cocoa-touch], and [cocoa] for (language-agnostic) questions about the platforms or frameworks.
57
votes
1
answers
2K
views
How to use swift library in NativeScript?
I am trying to use this ios-charts library in NativeScript. This library is written in Swift and not in Object
62
votes
21
answers
1.9K
views
Add bottom border line to UI TextField view in SwiftUI / Swift / Objective-C / Xamarin
I would like to keep the border at the bottom part only in UITextField. But I don't know how we can keep
57
votes
18
answers
347
views
Updating to latest version of CocoaPods?
I'm having some issues installing Alamofire 4.0 into my project. I've got the latest version of Xcod
53
votes
25
answers
1.1K
views
How can I change image tintColor in iOS and WatchKit
I have an UIImageView called "theImageView", with UIImage in a single color (transparent background) just like
64
votes
14
answers
336
views
How do I concatenate or merge arrays in Swift?
If there are two arrays created in swift like this: var a:[CGFloat] = [1, 2, 3] var b:[CGFloat] = [4, 5, 6]
58
votes
18
answers
353
views
How do I get a reference to the app delegate in Swift?
How do I get a reference to the app delegate in Swift? Ultimately, I want to use the reference to access the
60
votes
30
answers
2.8K
views
Close iOS Keyboard by touching anywhere using Swift
I have been looking all over for this but I can't seem to find it. I know how to dismiss the keyboard us
64
votes
12
answers
1.8K
views
What does "Fatal error: Unexpectedly found nil while unwrapping an Optional value" mean?
My Swift program is crashing with EXC_BAD_INSTRUCTION and one of the following similar errors. What does this
71
votes
9
answers
2K
views
Static vs class functions/variables in Swift classes?
The following code compiles in Swift 1.2: class myClass { static func myMethod1() { } class func
58
votes
30
answers
1.6K
views
Get nth character of a string in Swift programming language
How can I get the nth character of a string? I tried bracket([]) accessor with no luck. var string = "Hello,
55
votes
29
answers
805
views
How to determine the current iPhone/device model?
Is there a way to get the device model name (iPhone 4S, iPhone 5, iPhone 5S, etc) in Swift? I know there is a
54
votes
12
answers
1.1K
views
How do I write dispatch_after GCD in Swift 3, 4, and 5?
In Swift 2, I was able to use dispatch_after to delay an action using grand central dispatch: var dispatchTim
61
votes
30
answers
714
views
How do I get the App version and build number using Swift?
I have an IOS app with an Azure back-end, and would like to log certain events, like logins and which versions
51
votes
30
answers
2.3K
views
Loading/Downloading image from URL on Swift
I'd like to load an image from a URL in my application, so I first tried with Objective-C and it worked,
54
votes
25
answers
2.9K
views
How does one generate a random number in Apple's Swift language?
I realize the Swift book provided an implementation of a random number generator. Is the best practice to cop
58
votes
30
answers
1.6K
views
How to hide UINavigationBar 1px bottom line
I have an app that sometimes needs its navigation bar to blend in with the content. Does anyone know how to
61
votes
29
answers
1.6K
views
Rounding a double value to x number of decimal places in swift
Can anyone tell me how to round a double value to x number of decimal places in Swift? I have: var totalWor
53
votes
9
answers
2.2K
views
Shall we always use [unowned self] inside closure in Swift
In WWDC 2014 session 403 Intermediate Swift and transcript, there was the following slide The speaker said
54
votes
23
answers
2.1K
views
How to find index of list item in Swift?
I am trying to find an item index by searching a list. Does anybody know how to do that? I see there is list
58
votes
12
answers
2K
views
The use of Swift 3 @objc inference in Swift 4 mode is deprecated?
Briefly, while using Xcode 9 Beta, I have run into the following warning: The use of Swift 3 @objc inferen
