It’s possible to make and view a PHLivePhoto in the Playground from the elements of an actual Live Photo. In OS X’s Photos app, select a Live Photo and go to menu File > Export > Export original… It will create a .JPG and a .mov. Drop these two files in the Resources folder of … Read more
The error could be improved, but the problem with your first version is you have a member variable, delegate, that does not have a default value. All variables in Swift must always have a value. That means that you have to set it up in an initializer which you do not have or you could … Read more
Answer to the second part of your question can be found here swift docs The whitespace around an operator is used to determine whether an operator is used as a prefix operator, a postfix operator, or a binary operator. This behavior is summarized in the following rules: If an operator has whitespace around both sides … Read more
update: Xcode 8.2.1 • Swift 3.0.2 You can use NumberFormatter() to convert your string to number. You just need to specify the decimalSeparator as follow: extension String { static let numberFormatter = NumberFormatter() var doubleValue: Double { String.numberFormatter.decimalSeparator = “.” if let result = String.numberFormatter.number(from: self) { return result.doubleValue } else { String.numberFormatter.decimalSeparator = “,” … Read more
In Swift 2.0, toInt(), etc., have been replaced with initializers. (In this case, Int(someString).) Because not all strings can be converted to ints, this initializer is failable, which means it returns an optional int (Int?) instead of just an Int. The best thing to do is unwrap this optional using if let. I’m not sure … Read more
As of Swift 2, String doesn’t conform to SequenceType. However, you can use the characters property on String. characters returns a String.CharacterView which conforms to SequenceType and so can be iterated through with a for loop: let word = “Zebra” for i in word.characters { print(i) } Alternatively, you could add an extension to String … Read more
You can do this with Auto Layout. The secret is to constrain the edges of the containerView to the edges of the scrollView. It’s not intuitive, but constraining the edges of the containerView doesn’t set the size, it just makes sure that the content size of the scrollView grows as the containerView grows. By setting … Read more
I have to thank Nate Cook for first for his quick response and solid answer. Just for case I share his answer from another post, which title is misleading. See Nate’s answer here: https://stackoverflow.com/a/26723557/2360439 Playgrounds are sandboxed, so you won’t be able to just grab files from anywhere in your user folder. Here’s how to … Read more
Look at the iOS Developer Library->Playground Help and search”Resource Files” and you will find the answer 1、Open the .playground 2、Show the Project navigator by selecting View > Navigators > Show Project Navigator. 3、Drag the images to the Resources Like follow:
The problem is that DatePicker grabs binding and is not so fast to release it even when you remove it from view, due to Toggle action, so it crashes on force unwrap optional, which becomes nil … The solution for this crash is DatePicker( “Due Date”, selection: Binding<Date>(get: {self.testDate ?? Date()}, set: {self.testDate = $0}), … Read more