上一个 segue 在不同的按钮上按时重复
Previous segue repeats on time on different button
我会尝试向您解释我在 best.I 尝试使用圆形动画构建一种时间表时遇到的问题。
我有 2 个视图：第一个包含 6 个按钮，标题从星期一到星期六。当用户点击一个按钮时，它将以模态方式呈现第二个视图，其中仅包含一个没有标题的按钮；第二个视图将采用前一个 VC: ScheduleDaysViewController 中的背景颜色和按钮标题。
在第二个视图中，如果用户单击按钮，它将关闭视图并传递给 ScheduleDaysVC。
正如您从代码中看到的那样，这是通过在 ScheduleDaysVC 中设置 2 个变量来完成的：dayToPass 和 colorToPass。这些变量根据触发的 IBAction 和 segue 之前的变化而变化，使用函数 "prepare for segue" 我设置了 ScheduleViewController 的变量 titoloPulsante 和 backgroundColor。
这里的问题是，当我尝试该应用程序时，我单击“星期一”，它会打开第二个视图，其中包含按钮“星期一”的标题和星期一的颜色，即红色渐变；在此之后我关闭视图并单击星期二，它再次打开带有星期一标题和红色的第二个视图。
如果我 return 回到天视图并在星期二再次 re-click 它将最终打开第二个视图，标题为星期二和正确的颜色，因此是紫罗兰色。它发生在所有按钮上，除了 FRIDAY。因此，如果我在 return 从星期二视图编辑后单击星期三，它将再次打开星期二视图，如果我 return 返回并在星期三 re-click 它将打开正确的视图，但是如果我在 return 从 WEDNESDAY 视图编辑后单击 FRIDAY 或 MONDAY，它将立即打开正确的视图，而不会重复上一个视图。
我无法理解代码有什么问题，因为每个 IBAction 基本上都是一样的，它适用于星期一和星期五，但如果我点击其他日子，我也会打开前一个 view.I post 结果应用的一种模式。感谢您的耐心等待，如有错误或解释不当，请多多包涵。
ISSUE SCHEMA
STORYBOARD SEGUES:SAME FOR EVERY BUTTON
import UIKit
class ScheduleDaysViewController: UIViewController,UIViewControllerTransitioningDelegate {
let transition = CircularAnimation()
var dayToPass: String = ""
var colorToPass = UIColor()
@IBOutlet var mondayButton: UIButton!
@IBOutlet var tuesdayButton: UIButton!
@IBOutlet var wednesdayButton: UIButton!
@IBOutlet var thursdayButton: UIButton!
@IBOutlet var fridayButton: UIButton!
@IBOutlet var saturdayButton: UIButton!
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let schedule = segue.destination as! ScheduleViewController
schedule.transitioningDelegate = self
schedule.modalPresentationStyle = .custom
schedule.titoloPulsante = dayToPass
schedule.backgroundColor = colorToPass
print("\n\n\nTITLE : \(dayToPass)")
print("\n\n\nDAY : \(colorToPass)")
}
/////////
@IBAction func mondayPressed(_ sender: Any) {
print("\n\n\nMONDAY")
transition.startingPoint = mondayButton.center
transition.circleColor = mondayButton.backgroundColor!
dayToPass = (mondayButton.titleLabel?.text)!
colorToPass = mondayButton.backgroundColor!
}
/////////
@IBAction func tuesdayPressed(_ sender: Any) {
print("\n\n\nTUESDAY")
transition.startingPoint = tuesdayButton.center
transition.circleColor = tuesdayButton.backgroundColor!
dayToPass = (tuesdayButton.titleLabel?.text)!
colorToPass = tuesdayButton.backgroundColor!
}
/////////
@IBAction func thursdayPressed(_ sender: Any) {
print("\n\n\nTHURSDAY")
transition.startingPoint = thursdayButton.center
transition.circleColor = thursdayButton.backgroundColor!
dayToPass = (thursdayButton.titleLabel?.text)!
colorToPass = thursdayButton.backgroundColor!
}
/////////
@IBAction func fridayPressed(_ sender: Any) {
transition.startingPoint = fridayButton.center
transition.circleColor = fridayButton.backgroundColor!
dayToPass = (fridayButton.titleLabel?.text)!
colorToPass = fridayButton.backgroundColor!
}
/////////
@IBAction func wednesdayPressed(_ sender: Any) {
transition.startingPoint = wednesdayButton.center
transition.circleColor = wednesdayButton.backgroundColor!
dayToPass = (wednesdayButton.titleLabel?.text)!
colorToPass = wednesdayButton.backgroundColor!
}
/////////
@IBAction func saturdayPressed(_ sender: Any) {
transition.startingPoint = saturdayButton.center
transition.circleColor = saturdayButton.backgroundColor!
dayToPass = (saturdayButton.titleLabel?.text)!
colorToPass = saturdayButton.backgroundColor!
}
/////////
override func viewDidLoad() {
super.viewDidLoad()
mondayButton.layer.cornerRadius = mondayButton.frame.size.width / 2
tuesdayButton.layer.cornerRadius = tuesdayButton.frame.size.width / 2
wednesdayButton.layer.cornerRadius = wednesdayButton.frame.size.width / 2
thursdayButton.layer.cornerRadius = thursdayButton.frame.size.width / 2
fridayButton.layer.cornerRadius = fridayButton.frame.size.width / 2
saturdayButton.layer.cornerRadius = saturdayButton.frame.size.width / 2
mondayButton.backgroundColor = hexStringToUIColor(hex: "#FFCDD2")
tuesdayButton.backgroundColor = hexStringToUIColor(hex: "#E1BEE7")
wednesdayButton.backgroundColor = hexStringToUIColor(hex: "#C5CAE9")
thursdayButton.backgroundColor = hexStringToUIColor(hex: "#B2DFDB")
fridayButton.backgroundColor = hexStringToUIColor(hex: "#C8E6C9")
saturdayButton.backgroundColor = hexStringToUIColor(hex: "#FFECB3")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
transition.transitionMode = .dismiss
return transition
}
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
transition.transitionMode = .present
return transition
}
func hexStringToUIColor (hex:String) -> UIColor {
var cString:String = hex.trimmingCharacters(in: .whitespacesAndNewlines).uppercased()
if (cString.hasPrefix("#")) {
cString.remove(at: cString.startIndex)
}
if ((cString.characters.count) != 6) {
return UIColor.gray
}
var rgbValue:UInt32 = 0
Scanner(string: cString).scanHexInt32(&rgbValue)
return UIColor(
red: CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0,
green: CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0,
blue: CGFloat(rgbValue & 0x0000FF) / 255.0,
alpha: CGFloat(1.0)
)
}
}
import UIKit
class ScheduleViewController: UIViewController {
var titoloPulsante: String?
var backgroundColor = UIColor()
@IBOutlet var dismissButton: UIButton!
@IBAction func dayButtonPressed(_ sender: Any) {
titoloPulsante = nil
self.dismiss(animated: true, completion: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = backgroundColor
dismissButton.backgroundColor = backgroundColor
navigationController?.navigationBar.isHidden = true
dismissButton.setTitle(titoloPulsante, for:.normal)
dismissButton.layer.cornerRadius = dismissButton.frame.size.width / 2
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
根据 link(How to execute button press action before prepareForSegue in iOS?)，只有 "mondayPressed" 会在 "prepare" 之前执行。所有其他功能（tuesdayPressed，...）将在 "prepare".
之后执行
将函数名从 "tuesdayPressed" 更改为 "btntuesdayPressed" 后，它工作正常。
我会尝试向您解释我在 best.I 尝试使用圆形动画构建一种时间表时遇到的问题。
我有 2 个视图：第一个包含 6 个按钮，标题从星期一到星期六。当用户点击一个按钮时，它将以模态方式呈现第二个视图，其中仅包含一个没有标题的按钮；第二个视图将采用前一个 VC: ScheduleDaysViewController 中的背景颜色和按钮标题。 在第二个视图中，如果用户单击按钮，它将关闭视图并传递给 ScheduleDaysVC。
正如您从代码中看到的那样，这是通过在 ScheduleDaysVC 中设置 2 个变量来完成的：dayToPass 和 colorToPass。这些变量根据触发的 IBAction 和 segue 之前的变化而变化，使用函数 "prepare for segue" 我设置了 ScheduleViewController 的变量 titoloPulsante 和 backgroundColor。
这里的问题是，当我尝试该应用程序时，我单击“星期一”，它会打开第二个视图，其中包含按钮“星期一”的标题和星期一的颜色，即红色渐变；在此之后我关闭视图并单击星期二，它再次打开带有星期一标题和红色的第二个视图。 如果我 return 回到天视图并在星期二再次 re-click 它将最终打开第二个视图，标题为星期二和正确的颜色，因此是紫罗兰色。它发生在所有按钮上，除了 FRIDAY。因此，如果我在 return 从星期二视图编辑后单击星期三，它将再次打开星期二视图，如果我 return 返回并在星期三 re-click 它将打开正确的视图，但是如果我在 return 从 WEDNESDAY 视图编辑后单击 FRIDAY 或 MONDAY，它将立即打开正确的视图，而不会重复上一个视图。
我无法理解代码有什么问题，因为每个 IBAction 基本上都是一样的，它适用于星期一和星期五，但如果我点击其他日子，我也会打开前一个 view.I post 结果应用的一种模式。感谢您的耐心等待，如有错误或解释不当，请多多包涵。
ISSUE SCHEMA
STORYBOARD SEGUES:SAME FOR EVERY BUTTON
import UIKit
class ScheduleDaysViewController: UIViewController,UIViewControllerTransitioningDelegate {
let transition = CircularAnimation()
var dayToPass: String = ""
var colorToPass = UIColor()
@IBOutlet var mondayButton: UIButton!
@IBOutlet var tuesdayButton: UIButton!
@IBOutlet var wednesdayButton: UIButton!
@IBOutlet var thursdayButton: UIButton!
@IBOutlet var fridayButton: UIButton!
@IBOutlet var saturdayButton: UIButton!
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let schedule = segue.destination as! ScheduleViewController
schedule.transitioningDelegate = self
schedule.modalPresentationStyle = .custom
schedule.titoloPulsante = dayToPass
schedule.backgroundColor = colorToPass
print("\n\n\nTITLE : \(dayToPass)")
print("\n\n\nDAY : \(colorToPass)")
}
/////////
@IBAction func mondayPressed(_ sender: Any) {
print("\n\n\nMONDAY")
transition.startingPoint = mondayButton.center
transition.circleColor = mondayButton.backgroundColor!
dayToPass = (mondayButton.titleLabel?.text)!
colorToPass = mondayButton.backgroundColor!
}
/////////
@IBAction func tuesdayPressed(_ sender: Any) {
print("\n\n\nTUESDAY")
transition.startingPoint = tuesdayButton.center
transition.circleColor = tuesdayButton.backgroundColor!
dayToPass = (tuesdayButton.titleLabel?.text)!
colorToPass = tuesdayButton.backgroundColor!
}
/////////
@IBAction func thursdayPressed(_ sender: Any) {
print("\n\n\nTHURSDAY")
transition.startingPoint = thursdayButton.center
transition.circleColor = thursdayButton.backgroundColor!
dayToPass = (thursdayButton.titleLabel?.text)!
colorToPass = thursdayButton.backgroundColor!
}
/////////
@IBAction func fridayPressed(_ sender: Any) {
transition.startingPoint = fridayButton.center
transition.circleColor = fridayButton.backgroundColor!
dayToPass = (fridayButton.titleLabel?.text)!
colorToPass = fridayButton.backgroundColor!
}
/////////
@IBAction func wednesdayPressed(_ sender: Any) {
transition.startingPoint = wednesdayButton.center
transition.circleColor = wednesdayButton.backgroundColor!
dayToPass = (wednesdayButton.titleLabel?.text)!
colorToPass = wednesdayButton.backgroundColor!
}
/////////
@IBAction func saturdayPressed(_ sender: Any) {
transition.startingPoint = saturdayButton.center
transition.circleColor = saturdayButton.backgroundColor!
dayToPass = (saturdayButton.titleLabel?.text)!
colorToPass = saturdayButton.backgroundColor!
}
/////////
override func viewDidLoad() {
super.viewDidLoad()
mondayButton.layer.cornerRadius = mondayButton.frame.size.width / 2
tuesdayButton.layer.cornerRadius = tuesdayButton.frame.size.width / 2
wednesdayButton.layer.cornerRadius = wednesdayButton.frame.size.width / 2
thursdayButton.layer.cornerRadius = thursdayButton.frame.size.width / 2
fridayButton.layer.cornerRadius = fridayButton.frame.size.width / 2
saturdayButton.layer.cornerRadius = saturdayButton.frame.size.width / 2
mondayButton.backgroundColor = hexStringToUIColor(hex: "#FFCDD2")
tuesdayButton.backgroundColor = hexStringToUIColor(hex: "#E1BEE7")
wednesdayButton.backgroundColor = hexStringToUIColor(hex: "#C5CAE9")
thursdayButton.backgroundColor = hexStringToUIColor(hex: "#B2DFDB")
fridayButton.backgroundColor = hexStringToUIColor(hex: "#C8E6C9")
saturdayButton.backgroundColor = hexStringToUIColor(hex: "#FFECB3")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
transition.transitionMode = .dismiss
return transition
}
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
transition.transitionMode = .present
return transition
}
func hexStringToUIColor (hex:String) -> UIColor {
var cString:String = hex.trimmingCharacters(in: .whitespacesAndNewlines).uppercased()
if (cString.hasPrefix("#")) {
cString.remove(at: cString.startIndex)
}
if ((cString.characters.count) != 6) {
return UIColor.gray
}
var rgbValue:UInt32 = 0
Scanner(string: cString).scanHexInt32(&rgbValue)
return UIColor(
red: CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0,
green: CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0,
blue: CGFloat(rgbValue & 0x0000FF) / 255.0,
alpha: CGFloat(1.0)
)
}
}
import UIKit
class ScheduleViewController: UIViewController {
var titoloPulsante: String?
var backgroundColor = UIColor()
@IBOutlet var dismissButton: UIButton!
@IBAction func dayButtonPressed(_ sender: Any) {
titoloPulsante = nil
self.dismiss(animated: true, completion: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = backgroundColor
dismissButton.backgroundColor = backgroundColor
navigationController?.navigationBar.isHidden = true
dismissButton.setTitle(titoloPulsante, for:.normal)
dismissButton.layer.cornerRadius = dismissButton.frame.size.width / 2
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
根据 link(How to execute button press action before prepareForSegue in iOS?)，只有 "mondayPressed" 会在 "prepare" 之前执行。所有其他功能（tuesdayPressed，...）将在 "prepare".
之后执行将函数名从 "tuesdayPressed" 更改为 "btntuesdayPressed" 后，它工作正常。