I have update Xcode to 7.3 and now I have a warning to the function that I use to create random strings.
I have tried to change the for statement with for (i in 0 ..< len){...} however, the warning became an error.
How can I remove the warning?
static func randomStringWithLength (len : Int) -> NSString {
let letters : NSString = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
let randomString : NSMutableString = NSMutableString(capacity: len)
for (var i=0; i < len; i += 1){ // warning
let length = UInt32 (letters.length)
let rand = arc4random_uniform(length)
randomString.appendFormat("%C", letters.characterAtIndex(Int(rand)))
}
return randomString
}
C-style for loop has been deprecated in Swift 3. You can continue using it for a while, but they will certainly disappear in the future.
You can rewrite your loop to Swift's style:
for i in 0..<len {
let length = UInt32 (letters.length)
let rand = arc4random_uniform(length)
randomString.appendFormat("%C", letters.characterAtIndex(Int(rand)))
}
Since you don't use i at all in the loop's body, you can replace it with:
for _ in 0..<len {
// do stuffs
}
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