應用程序在Simulator（Xcode 7.1.1）中運行良好，但在iOS設備上運行不正常

Question

我有一個可以計算兩個日期之間差異的應用程序。 它可以在Simulator中正常運行，但不能在iOS設備（使用iOS 9的iPad）上運行。

當我按下iPad上的“計算差異”按鈕時，沒有任何反應。 在Xcode的調試區域中，我收到以下錯誤消息：

2015-11-16 08：33：32.246日期至日期計算器[369：64113] <CATransformLayer: >0x17eb95e0> -更改僅轉換圖層中的屬性masksToBounds，將不會產生任何效果2015-11-16 08:33 ：32.250

日期至日期計算器[369：64113] <CATransformLayer: 0x17d8ea30> -更改>僅轉換圖層中的屬性masksToBounds，將無效2015-11-16 08：33：32.251

日期至日期計算器[369：64113] <CATransformLayer: 0x17d95830> -更改>僅轉換圖層中的屬性maskToBounds無效

我已經在SO上搜索了此內容，但找不到解決方案。

有沒有人有什么建議？

謝謝！

請在下面找到View Controller代碼：

import UIKit

類ViewController：UIViewController {

@IBOutlet weak var startDateTextField: UITextField!
@IBOutlet weak var endDateTextField: UITextField!
@IBOutlet weak var resultNumberOfDays: UILabel!
@IBOutlet weak var resultWeeksAndDays: UILabel!



override func viewDidLoad() {
    super.viewDidLoad()

    self.view.backgroundColor = UIColor(red: 210/255, green: 213/255, blue: 220/255, alpha: 1.0)

    let toolBar = UIToolbar(frame: CGRectMake(0, self.view.frame.size.height/6, self.view.frame.size.width, 40.0))

    toolBar.layer.position = CGPoint(x: self.view.frame.size.width/2, y: self.view.frame.size.height-20.0)

    toolBar.barStyle = UIBarStyle.BlackTranslucent

    toolBar.tintColor = UIColor.whiteColor()

    UIToolbar.appearance().barTintColor = UIColor(red: 0/255, green: 0/255, blue: 205/255, alpha: 1.0)

    let todayBtn = UIBarButtonItem(title: "Today", style: UIBarButtonItemStyle.Plain, target: self, action: "tappedToolBarBtn:")

    let okBarBtn = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.Plain, target: self, action: "donePressed:")

    // let okBarBtn = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Done, target: self, action: "donePressed:")

    let flexSpace = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: self, action: nil)

    let label = UILabel(frame: CGRect(x: 0, y: 0, width: self.view.frame.size.width / 3, height: self.view.frame.size.height))

    label.font = UIFont(name: "Helvetica Neue", size: 13)

    label.backgroundColor = UIColor.clearColor()

    label.textColor = UIColor.whiteColor()

    label.text = "Select a Start Date"

    label.textAlignment = NSTextAlignment.Center

    let textBtn = UIBarButtonItem(customView: label)

    toolBar.setItems([todayBtn,flexSpace,textBtn,flexSpace,okBarBtn], animated: true)

    startDateTextField.inputAccessoryView = toolBar


    let toolBar2 = UIToolbar(frame: CGRectMake(0, self.view.frame.size.height/6, self.view.frame.size.width, 40.0))

    toolBar2.layer.position = CGPoint(x: self.view.frame.size.width/2, y: self.view.frame.size.height-20.0)

    toolBar2.barStyle = UIBarStyle.BlackTranslucent

    toolBar2.tintColor = UIColor.whiteColor()

    UIToolbar.appearance().barTintColor = UIColor(red: 0/255, green: 0/255, blue: 205/255, alpha: 1.0)

    let todayBtn2 = UIBarButtonItem(title: "Today", style: UIBarButtonItemStyle.Plain, target: self, action: "secondTappedToolBarBtn:")

    let okBarBtn2 = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.Plain, target: self, action: "secondDonePressed:")

    // let okBarBtn2 = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Done, target: self, action: "secondDonePressed:")

    let flexSpace2 = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: self, action: nil)

    let label2 = UILabel(frame: CGRect(x: 0, y: 0, width: self.view.frame.size.width / 3, height: self.view.frame.size.height))

    label2.font = UIFont(name: "Helvetica Neue", size: 13)

    label2.backgroundColor = UIColor.clearColor()

    label2.textColor = UIColor.whiteColor()

    label2.text = "Select an End Date"

    label2.textAlignment = NSTextAlignment.Center

    let textBtn2 = UIBarButtonItem(customView: label2)

    toolBar2.setItems([todayBtn2,flexSpace2,textBtn2,flexSpace2,okBarBtn2], animated: true)

     endDateTextField.inputAccessoryView = toolBar2

    // Do any additional setup after loading the view, typically from a nib.
}



override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}




func donePressed(sender: UIBarButtonItem) {

    startDateTextField.resignFirstResponder()

}


func secondDonePressed(sender: UIBarButtonItem) {

    endDateTextField.resignFirstResponder()

}




func tappedToolBarBtn(sender: UIBarButtonItem) {

    let dateformatter = NSDateFormatter()
    dateformatter.dateStyle = NSDateFormatterStyle.MediumStyle
    dateformatter.timeStyle = NSDateFormatterStyle.NoStyle
    startDateTextField.text = dateformatter.stringFromDate(NSDate())
    startDateTextField.resignFirstResponder()
}


func secondTappedToolBarBtn(sender: UIBarButtonItem) {

    let dateformatter = NSDateFormatter()
    dateformatter.dateStyle = NSDateFormatterStyle.MediumStyle
    dateformatter.timeStyle = NSDateFormatterStyle.NoStyle
    endDateTextField.text = dateformatter.stringFromDate(NSDate())
    endDateTextField.resignFirstResponder()
}



override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    self.view.endEditing(true)
}


@IBAction func textFieldEditing(sender: UITextField) {
    let datePickerView: UIDatePicker = UIDatePicker()
    datePickerView.datePickerMode = UIDatePickerMode.Date
    sender.inputView = datePickerView
    datePickerView.addTarget(self, action: Selector("datePickerValueChanged:"), forControlEvents: UIControlEvents.ValueChanged)

}



@IBAction func secondTextFieldEditing(sender: UITextField) {
    let datePickerView: UIDatePicker = UIDatePicker()
    datePickerView.datePickerMode = UIDatePickerMode.Date
    sender.inputView = datePickerView
    datePickerView.addTarget(self, action: Selector("secondDatePickerValueChanged:"), forControlEvents: UIControlEvents.ValueChanged)

}



func datePickerValueChanged(sender: UIDatePicker) {
    let dateFormatter = NSDateFormatter()
    dateFormatter.dateStyle = NSDateFormatterStyle.MediumStyle
    dateFormatter.timeStyle = NSDateFormatterStyle.NoStyle
    startDateTextField.text = dateFormatter.stringFromDate(sender.date)

}



func secondDatePickerValueChanged(sender: UIDatePicker) {
        let dateFormatter = NSDateFormatter()
        dateFormatter.dateStyle = NSDateFormatterStyle.MediumStyle
        dateFormatter.timeStyle = NSDateFormatterStyle.NoStyle
        endDateTextField.text = dateFormatter.stringFromDate(sender.date)

}


@IBAction func calculateDays(sender: UIButton) {

    if startDateTextField.text! == "" || endDateTextField! == "" {

        let alert2 = UIAlertController(title: "Oops!", message: "Please Select a Start Date!", preferredStyle: UIAlertControllerStyle.Alert)
        alert2.addAction(UIAlertAction(title: "Close", style: UIAlertActionStyle.Default, handler: nil))
        self.presentViewController(alert2, animated: true, completion: nil)


    }
    else {

        let start = String(startDateTextField.text!)
        let end = String(endDateTextField.text!)
        let dateFormatter = NSDateFormatter()
        dateFormatter.dateFormat = "MM-dd-yyyy"


        guard let startDate = dateFormatter.dateFromString(start), endDate = dateFormatter.dateFromString(end) else {
            // You don't have dates, show error(print("error"), do no nothing - your choice.
            return
        }


        // let startDate:NSDate = dateFormatter.dateFromString(start)!
        // let endDate:NSDate = dateFormatter.dateFromString(end)!
        let calendar = NSCalendar.currentCalendar()
        let components = calendar.components([.Day], fromDate: startDate, toDate: endDate, options: [])
        let secondNewString = "\(components.day) days"
        resultNumberOfDays.text = secondNewString

    }

}


@IBAction func calculateWeeksAndDays(sender: UIButton) {

    if startDateTextField.text! == "" || endDateTextField! == "" {

        let alert2 = UIAlertController(title: "Oops!", message: "Please Select an End Date!", preferredStyle: UIAlertControllerStyle.Alert)
        alert2.addAction(UIAlertAction(title: "Close", style: UIAlertActionStyle.Default, handler: nil))
        self.presentViewController(alert2, animated: true, completion: nil)
    }
    else {

    let start = String(startDateTextField.text!)
    let end = String(endDateTextField.text!)
    let dateFormatter = NSDateFormatter()
    dateFormatter.dateFormat = "MM-dd-yyyy"



        guard let startDate = dateFormatter.dateFromString(start), endDate = dateFormatter.dateFromString(end) else {
            // You don't have dates, show error(print("error"), do no nothing - your choice.
            return
 }


    // let startDate:NSDate = dateFormatter.dateFromString(start)!
    // let endDate:NSDate = dateFormatter.dateFromString(end)!
    let calendar = NSCalendar.currentCalendar()
    let components = calendar.components([.Day], fromDate: startDate, toDate: endDate, options: [])
    let days = components.day
    let weeks = components.day / 7
    let weeksanddays = days % 7
    let newString = "\(weeks) weeks + \(weeksanddays) days"
    resultWeeksAndDays.text = newString
}

}

@IBAction func resetLabels(sender: AnyObject) {

    resultNumberOfDays.text = ""
    resultWeeksAndDays.text = ""


}

}

Answer 1

我敢打賭，就目前而言，您的代碼即使在模擬器中也無法“正常運行”。 例如，當我第一次點擊文本字段時，日期選擇器不會顯示。 我必須在背景屏幕上點擊才能重新簽名FirstResponder，然后再次在文本字段上點擊以顯示日期選擇器。

那里的問題是，直到文本字段成為第一響應者之后 ，您才實例化日期選擇器並將其連接到文本字段，您需要在成為第一響應者之前進行此操作。 （例如，在viewDidLoad方法中。）