Question

我已经将var input, cwidRows, results, i; // divide input string into an array of strings representing each line input = stringFromTextArea; cwidRows = input.split("\n"); // put acceptable results into results array for later use results = []; for (i = 0; i < cwidRows; i++) { if (cwidRows[i].split(":")[1] !== "Y") results.push(cwidRows[i]); }子类化，并设法为UIApplication函数设置了一个监听器。当用户触摸键盘上的某个按钮时，如何收到通知？我可以在sendEvent中获取触摸位置，是否可以将此位置转换为所选字符？

sendEvent

Answer 1

你根本就不能。

如果开发人员和应用程序可以访问用户密码，那将是一个巨大的安全风险。即使您可以使用私有API收听有关键命中的键盘通知（我认为这是不可能的），您的应用程序永远不会进入AppStore，它会被拒绝。

如果您自己制作键盘，则只能接收有关应用程序外键击的信息，但即使这样，系统也会使用所有密码和密码的默认键盘。

Answer 2

我通过将位置转换为密钥来获取密钥此方法仅适用于带有默认键盘的i phone 7 plus 并且有时候它返回错误的键并不完美

func  getKeyFromLocation(location : CGPoint) -> String{
    var keysLocation   = [String: CGPoint]()
    keysLocation["q"] = CGPoint(x: 29, y: 29)
    keysLocation["w"] = CGPoint(x: 68, y: 29)
    keysLocation["e"] = CGPoint(x: 107, y: 29)
    keysLocation["r"] = CGPoint(x: 146, y: 29)
    keysLocation["t"] = CGPoint(x: 185, y: 29)
    keysLocation["y"] = CGPoint(x: 224, y: 29)
    keysLocation["u"] = CGPoint(x: 263, y: 29)
    keysLocation["i"] = CGPoint(x: 302, y: 29)
    keysLocation["o"] = CGPoint(x: 351, y: 29)
    keysLocation["p"] = CGPoint(x: 390, y: 29)
    keysLocation["a"] = CGPoint(x: 60, y: 80)
    keysLocation["s"] = CGPoint(x: 99, y: 80)
    keysLocation["d"] = CGPoint(x: 138, y: 80)
    keysLocation["f"] = CGPoint(x: 177, y: 80)
    keysLocation["g"] = CGPoint(x: 216, y: 80)
    keysLocation["h"] = CGPoint(x: 255, y: 80)
    keysLocation["j"] = CGPoint(x: 294, y: 80)
    keysLocation["k"] = CGPoint(x: 333, y: 80)
    keysLocation["l"] = CGPoint(x: 372, y: 80)
    keysLocation["z"] = CGPoint(x: 99, y: 140)
    keysLocation["x"] = CGPoint(x: 138, y: 140)
    keysLocation["c"] = CGPoint(x: 177, y: 140)
    keysLocation["v"] = CGPoint(x: 216, y: 140)
    keysLocation["b"] = CGPoint(x: 255, y: 140)
    keysLocation["n"] = CGPoint(x: 294, y: 140)
    keysLocation["m"] = CGPoint(x: 333, y: 140)

    var selectedkeycode = ""
    var minDistance = CGFloat(1000.0)

    for (keycode, point) in keysLocation {
        let distance = hypot(location.x - point.x, location.y - point.y)
        if(distance < minDistance ){
            minDistance = distance
            selectedkeycode = keycode
        }

    }

    print(minDistance)

    if(minDistance > CGFloat(50.0)){
        return ""
    }
    else{
        return selectedkeycode
    }



}

收听键盘按下通知

2 个答案: