How to call C from Swift? - Stack Overflow
2015年5月17日 · To use C++ files directly, you should create an objective-C wrapper. You'll want the implementation (which should reside by itself in a .mm file) to contain Objective-C++ code …
How to generate a random number in Swift? - Stack Overflow
2014年6月3日 · In Swift 4.2 you can generate random numbers by calling the random() method on whatever numeric type you want, providing the range you want to work with. For example, …
#ifdef replacement in the Swift language - Stack Overflow
2014年6月3日 · In Swift you can still use the "#if/#else/#endif" preprocessor macros (although more constrained), as per Apple docs. Here's an example: #if DEBUG let a = 2 #else let a = 3 …
How do I concatenate strings in Swift? - Stack Overflow
2014年6月4日 · How to concatenate string in Swift? In Objective-C we do like. NSString *string = @"Swift"; NSString *resultStr = [string stringByAppendingString:@" is a new Programming …
ios - How to create a delay in Swift? - Stack Overflow
2014年12月17日 · In Swift 4.2 and Xcode 10.1. You have 4 ways total to delay. Out of these option 1 is preferable to call or execute a function after some time.
What is the difference between `let` and `var` in Swift?
2014年6月3日 · Swift let vs var. let - constant var - variable [Constant vs variable] [Struct vs Class] Official doc docs.swift.org says. The value of a constant can’t be changed once it’s set, …
Add an element to an array in Swift - Stack Overflow
Swift 4.2 var myArray: NSArray = [] let firstElement: String = "First element" let secondElement: String = "Second element" // Process to add the elements to the array …
Get nth character of a string in Swift - Stack Overflow
2016年1月12日 · Swift 4.2 or later Range and partial range subscripting using String 's indices property As variation of @LeoDabus nice answer , we may add an additional extension to …
Split a String into an array in Swift? - Stack Overflow
Split is a native Swift method introduced in Swift 4, and it returns an array of Substring values. On the other hand, components are part of the NSString class and return an array of String …
Simplest way to throw an error/exception with a custom message …
@VyachaslavGerchicov If you don’t know a simpler way for Swift, which was also specified in the question, then this would be the simplest way, even of you don’t consider it simple in a more …