How to handle runtime error in SWIFT language

Question

how to handle exceptions which occurs during run time in SWIFT

Answer 1

There are no Exceptions in Swift, similar to Objective-C's approach.

In development, you can use assert to catch any errors which might appear, and need to be fixed before going to production.

The classic NSError approach isn't altered, you send an NSErrorPointer, which gets populated.

Brief example:

var error: NSError?
var contents = NSFileManager.defaultManager().contentsOfDirectoryAtPath("/Users/leandros", error: &error)
if let error = error {
    println("An error occurred \(error)")
} else {
    println("Contents: \(contents)")
}