Swift：应用程序在模拟器中运行良好，但在实际的iPhone上崩溃了吗？

Question

I am a beginner and I created a kind of tic tac toe game and have been running it on the iPhone 5s simulator to weed out issues and just now I tried it out on my actual iPhone 5s and the app crashes when the AI is supposed to take its turn. Xcode draws an error (EXC_BAD_ACCESS) on the line below:

//Bunch of functions that check for exact spots:

func checktop(value:Int)->(location:String,pattern:String) {
    return ("top", checkFor(value, spots: [1,2,3])) //This line has error
}
func checkbottom(value:Int)->(location:String,pattern:String) {
    return ("bottom", checkFor(value, spots: [7,8,9]))
}
func checkmidAcross(value:Int)->(location:String,pattern:String) {
    return ("middle across", checkFor(value, spots: [4,5,6]))
}
func checkleft(value:Int)->(location:String,pattern:String) {
    return ("left down", checkFor(value, spots: [1,4,7]))
}
func checkmidDown(value:Int)->(location:String,pattern:String) {
    return ("middle down", checkFor(value, spots: [2,5,8]))
}
func checkright(value:Int)->(location:String,pattern:String) {
    return ("right down", checkFor(value, spots: [3,6,9]))
}
func checkLRdiag(value:Int)->(location:String,pattern:String) {
    return ("left-right diagonal", checkFor(value, spots: [1,5,9]))
}
func checkRLdiag(value:Int)->(location:String,pattern:String) {
    return ("right-left diagonal", checkFor(value, spots: [3,5,7]))
}

Why would the app run just fine on the simulator but crash on the actual device? What's going wrong? Here is my checkFor method:

func checkFor(value:Int, spots:Int[])->(String) {
    var conclusion = ""
    for cell in spots {
        if plays[cell] == value {
            conclusion += "1"
        }
        else {
            conclusion += "0"
        }
    }
    return conclusion
}

func isOccupied(spot:Int)->(Bool) {
    return Bool(plays[spot])
}

Answer 1

My App crashed with the same error on my device but not on the simulator. It turns out that my iOS 8 beta version did not match my Xcode beta version. So I would check and make sure that your iOS 8 beta and Xcode beta are both on version 4 (the latest at the time of this writing). Also make sure that you completely reinstall the App, clean build folder etc.

This is of course assuming there is not an error with your code. Maybe you can post your checkFor method if the above does not work.