如何从日期选择器中删除时间？
How to remove the time from Date Picker?
我在这里想要实现的是在我选择日期后从 UITextfield 中删除 "TIME"。例如 "D/M/Y" 我只想显示时间“00:00:00”或“+0000”。
这段代码不需要选择 "UIDate Picker" 的元素，因为我已经知道如何通过属性检查器以这种方式禁用时间，但不是这种方式。
我认为它需要以编程方式完成。
单独的代码 class:
import Foundation
import UIKit
import QuartzCore
class DatePickerDialog: UIView {
typealias DatePickerCallback = (date: NSDate) -> Void
/* Consts */
private let kDatePickerDialogDefaultButtonHeight: CGFloat = 50
private let kDatePickerDialogDefaultButtonSpacerHeight: CGFloat = 1
private let kDatePickerDialogCornerRadius: CGFloat = 7
private let kDatePickerDialogDoneButtonTag: Int = 1
/* Views */
private var dialogView: UIView!
private var titleLabel: UILabel!
private var datePicker: UIDatePicker!
private var cancelButton: UIButton!
private var doneButton: UIButton!
/* Vars */
private var defaultDate: NSDate?
private var datePickerMode: UIDatePickerMode?
private var callback: DatePickerCallback?
/* Overrides */
init() {
super.init(frame: CGRectMake(0, 0, UIScreen.mainScreen().bounds.size.width, UIScreen.mainScreen().bounds.size.height))
setupView()
}
required init(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
func setupView() {
self.dialogView = createContainerView()
self.dialogView!.layer.shouldRasterize = true
self.dialogView!.layer.rasterizationScale = UIScreen.mainScreen().scale
self.layer.shouldRasterize = true
self.layer.rasterizationScale = UIScreen.mainScreen().scale
self.dialogView!.layer.opacity = 0.5
self.dialogView!.layer.transform = CATransform3DMakeScale(1.3, 1.3, 1)
self.backgroundColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0)
self.addSubview(self.dialogView!)
UIApplication.sharedApplication().windows.first!.addSubview(self)
}
/* Handle device orientation changes */
func deviceOrientationDidChange(notification: NSNotification) {
/* TODO */
}
/* Create the dialog view, and animate opening the dialog */
func show(title: String, datePickerMode: UIDatePickerMode = .Date, callback: DatePickerCallback) {
show(title, doneButtonTitle: "Done", cancelButtonTitle: "Cancel", datePickerMode: datePickerMode, callback: callback)
}
func show(title: String, doneButtonTitle: String, cancelButtonTitle: String, defaultDate: NSDate = NSDate(), datePickerMode: UIDatePickerMode = .Date, callback: DatePickerCallback) {
self.titleLabel.text = title
self.doneButton.setTitle(doneButtonTitle, forState: .Normal)
self.cancelButton.setTitle(cancelButtonTitle, forState: .Normal)
self.datePickerMode = datePickerMode
self.callback = callback
self.defaultDate = defaultDate
self.datePicker.datePickerMode = self.datePickerMode ?? .Date
self.datePicker.date = self.defaultDate ?? NSDate()
/* Anim */
UIView.animateWithDuration(
0.2,
delay: 0,
options: UIViewAnimationOptions.CurveEaseInOut,
animations: { () -> Void in
self.backgroundColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.4)
self.dialogView!.layer.opacity = 1
self.dialogView!.layer.transform = CATransform3DMakeScale(1, 1, 1)
},
completion: nil
)
}
/* Dialog close animation then cleaning and removing the view from the parent */
private func close() {
let currentTransform = self.dialogView.layer.transform
let startRotation = (self.valueForKeyPath("layer.transform.rotation.z") as? NSNumber) as? Double ?? 0.0
let rotation = CATransform3DMakeRotation((CGFloat)(-startRotation + M_PI * 270 / 180), 0, 0, 0)
self.dialogView.layer.transform = CATransform3DConcat(rotation, CATransform3DMakeScale(1, 1, 1))
self.dialogView.layer.opacity = 1
UIView.animateWithDuration(
0.2,
delay: 0,
options: UIViewAnimationOptions.TransitionNone,
animations: { () -> Void in
self.backgroundColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0)
self.dialogView.layer.transform = CATransform3DConcat(currentTransform, CATransform3DMakeScale(0.6, 0.6, 1))
self.dialogView.layer.opacity = 0
}) { (finished: Bool) -> Void in
for v in self.subviews {
v.removeFromSuperview()
}
self.removeFromSuperview()
}
}
/* Creates the container view here: create the dialog, then add the custom content and buttons */
private func createContainerView() -> UIView {
let screenSize = countScreenSize()
let dialogSize = CGSizeMake(
300,
230
+ kDatePickerDialogDefaultButtonHeight
+ kDatePickerDialogDefaultButtonSpacerHeight)
// For the black background
self.frame = CGRectMake(0, 0, screenSize.width, screenSize.height)
// This is the dialog's container; we attach the custom content and the buttons to this one
let dialogContainer = UIView(frame: CGRectMake((screenSize.width - dialogSize.width) / 2, (screenSize.height - dialogSize.height) / 2, dialogSize.width, dialogSize.height))
// First, we style the dialog to match the iOS8 UIAlertView >>>
let gradient: CAGradientLayer = CAGradientLayer(layer: self.layer)
gradient.frame = dialogContainer.bounds
gradient.colors = [UIColor(red: 218/255, green: 218/255, blue: 218/255, alpha: 1).CGColor,
UIColor(red: 233/255, green: 233/255, blue: 233/255, alpha: 1).CGColor,
UIColor(red: 218/255, green: 218/255, blue: 218/255, alpha: 1).CGColor]
let cornerRadius = kDatePickerDialogCornerRadius
gradient.cornerRadius = cornerRadius
dialogContainer.layer.insertSublayer(gradient, atIndex: 0)
dialogContainer.layer.cornerRadius = cornerRadius
dialogContainer.layer.borderColor = UIColor(red: 198/255, green: 198/255, blue: 198/255, alpha: 1).CGColor
dialogContainer.layer.borderWidth = 1
dialogContainer.layer.shadowRadius = cornerRadius + 5
dialogContainer.layer.shadowOpacity = 0.1
dialogContainer.layer.shadowOffset = CGSizeMake(0 - (cornerRadius + 5) / 2, 0 - (cornerRadius + 5) / 2)
dialogContainer.layer.shadowColor = UIColor.blackColor().CGColor
dialogContainer.layer.shadowPath = UIBezierPath(roundedRect: dialogContainer.bounds, cornerRadius: dialogContainer.layer.cornerRadius).CGPath
// There is a line above the button
let lineView = UIView(frame: CGRectMake(0, dialogContainer.bounds.size.height - kDatePickerDialogDefaultButtonHeight - kDatePickerDialogDefaultButtonSpacerHeight, dialogContainer.bounds.size.width, kDatePickerDialogDefaultButtonSpacerHeight))
lineView.backgroundColor = UIColor(red: 198/255, green: 198/255, blue: 198/255, alpha: 1)
dialogContainer.addSubview(lineView)
// ˆˆˆ
//Title
self.titleLabel = UILabel(frame: CGRectMake(10, 10, 280, 30))
self.titleLabel.textAlignment = NSTextAlignment.Center
self.titleLabel.font = UIFont.boldSystemFontOfSize(17)
dialogContainer.addSubview(self.titleLabel)
self.datePicker = UIDatePicker(frame: CGRectMake(0, 30, 0, 0))
self.datePicker.autoresizingMask = UIViewAutoresizing.FlexibleRightMargin
self.datePicker.frame.size.width = 300
dialogContainer.addSubview(self.datePicker)
// Add the buttons
addButtonsToView(dialogContainer)
return dialogContainer
}
/* Add buttons to container */
private func addButtonsToView(container: UIView) {
let buttonWidth = container.bounds.size.width / 2
self.cancelButton = UIButton(type: UIButtonType.Custom) as UIButton
self.cancelButton.frame = CGRectMake(
0,
container.bounds.size.height - kDatePickerDialogDefaultButtonHeight,
buttonWidth,
kDatePickerDialogDefaultButtonHeight
)
self.cancelButton.setTitleColor(UIColor(red: 0, green: 0.5, blue: 1, alpha: 1), forState: UIControlState.Normal)
self.cancelButton.setTitleColor(UIColor(red: 0.2, green: 0.2, blue: 0.2, alpha: 0.5), forState: UIControlState.Highlighted)
self.cancelButton.titleLabel!.font = UIFont.boldSystemFontOfSize(14)
self.cancelButton.layer.cornerRadius = kDatePickerDialogCornerRadius
container.addSubview(self.cancelButton)
self.doneButton = UIButton(type: UIButtonType.Custom) as UIButton
self.doneButton.frame = CGRectMake(
buttonWidth,
container.bounds.size.height - kDatePickerDialogDefaultButtonHeight,
buttonWidth,
kDatePickerDialogDefaultButtonHeight
)
self.doneButton.tag = kDatePickerDialogDoneButtonTag
self.doneButton.setTitleColor(UIColor(red: 0, green: 0.5, blue: 1, alpha: 1), forState: UIControlState.Normal)
self.doneButton.setTitleColor(UIColor(red: 0.2, green: 0.2, blue: 0.2, alpha: 0.5), forState: UIControlState.Highlighted)
self.doneButton.titleLabel!.font = UIFont.boldSystemFontOfSize(14)
self.doneButton.layer.cornerRadius = kDatePickerDialogCornerRadius
self.doneButton.addTarget(self, action: "buttonTapped:", forControlEvents: UIControlEvents.TouchUpInside)
container.addSubview(self.doneButton)
}
func buttonTapped(sender: UIButton!) {
if sender.tag == kDatePickerDialogDoneButtonTag {
self.callback?(date: self.datePicker.date)
}
close()
}
/* Helper function: count and return the screen's size */
func countScreenSize() -> CGSize {
let screenWidth = UIScreen.mainScreen().bounds.size.width
let screenHeight = UIScreen.mainScreen().bounds.size.height
return CGSizeMake(screenWidth, screenHeight)
}
}
这里的代码定义在Viewcontroller.swift:
@IBAction func datePickerTapped(sender: AnyObject) {
DatePickerDialog().show("Select Date of Incident", doneButtonTitle: "Done", cancelButtonTitle: "Cancel", datePickerMode: .Date) {
(date) -> Void in
self.textField3.text = "\(date)"
}
}
很简单
将此行更改为
self.textField3.text = "\(date)"
至
var dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd" //format style. you can change according to yours
var dateString = dateFormatter.stringFromDate(date)
self.textField3.text = dateString
我在这里想要实现的是在我选择日期后从 UITextfield 中删除 "TIME"。例如 "D/M/Y" 我只想显示时间“00:00:00”或“+0000”。
这段代码不需要选择 "UIDate Picker" 的元素，因为我已经知道如何通过属性检查器以这种方式禁用时间，但不是这种方式。
我认为它需要以编程方式完成。
单独的代码 class:
import Foundation
import UIKit
import QuartzCore
class DatePickerDialog: UIView {
typealias DatePickerCallback = (date: NSDate) -> Void
/* Consts */
private let kDatePickerDialogDefaultButtonHeight: CGFloat = 50
private let kDatePickerDialogDefaultButtonSpacerHeight: CGFloat = 1
private let kDatePickerDialogCornerRadius: CGFloat = 7
private let kDatePickerDialogDoneButtonTag: Int = 1
/* Views */
private var dialogView: UIView!
private var titleLabel: UILabel!
private var datePicker: UIDatePicker!
private var cancelButton: UIButton!
private var doneButton: UIButton!
/* Vars */
private var defaultDate: NSDate?
private var datePickerMode: UIDatePickerMode?
private var callback: DatePickerCallback?
/* Overrides */
init() {
super.init(frame: CGRectMake(0, 0, UIScreen.mainScreen().bounds.size.width, UIScreen.mainScreen().bounds.size.height))
setupView()
}
required init(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
func setupView() {
self.dialogView = createContainerView()
self.dialogView!.layer.shouldRasterize = true
self.dialogView!.layer.rasterizationScale = UIScreen.mainScreen().scale
self.layer.shouldRasterize = true
self.layer.rasterizationScale = UIScreen.mainScreen().scale
self.dialogView!.layer.opacity = 0.5
self.dialogView!.layer.transform = CATransform3DMakeScale(1.3, 1.3, 1)
self.backgroundColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0)
self.addSubview(self.dialogView!)
UIApplication.sharedApplication().windows.first!.addSubview(self)
}
/* Handle device orientation changes */
func deviceOrientationDidChange(notification: NSNotification) {
/* TODO */
}
/* Create the dialog view, and animate opening the dialog */
func show(title: String, datePickerMode: UIDatePickerMode = .Date, callback: DatePickerCallback) {
show(title, doneButtonTitle: "Done", cancelButtonTitle: "Cancel", datePickerMode: datePickerMode, callback: callback)
}
func show(title: String, doneButtonTitle: String, cancelButtonTitle: String, defaultDate: NSDate = NSDate(), datePickerMode: UIDatePickerMode = .Date, callback: DatePickerCallback) {
self.titleLabel.text = title
self.doneButton.setTitle(doneButtonTitle, forState: .Normal)
self.cancelButton.setTitle(cancelButtonTitle, forState: .Normal)
self.datePickerMode = datePickerMode
self.callback = callback
self.defaultDate = defaultDate
self.datePicker.datePickerMode = self.datePickerMode ?? .Date
self.datePicker.date = self.defaultDate ?? NSDate()
/* Anim */
UIView.animateWithDuration(
0.2,
delay: 0,
options: UIViewAnimationOptions.CurveEaseInOut,
animations: { () -> Void in
self.backgroundColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.4)
self.dialogView!.layer.opacity = 1
self.dialogView!.layer.transform = CATransform3DMakeScale(1, 1, 1)
},
completion: nil
)
}
/* Dialog close animation then cleaning and removing the view from the parent */
private func close() {
let currentTransform = self.dialogView.layer.transform
let startRotation = (self.valueForKeyPath("layer.transform.rotation.z") as? NSNumber) as? Double ?? 0.0
let rotation = CATransform3DMakeRotation((CGFloat)(-startRotation + M_PI * 270 / 180), 0, 0, 0)
self.dialogView.layer.transform = CATransform3DConcat(rotation, CATransform3DMakeScale(1, 1, 1))
self.dialogView.layer.opacity = 1
UIView.animateWithDuration(
0.2,
delay: 0,
options: UIViewAnimationOptions.TransitionNone,
animations: { () -> Void in
self.backgroundColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0)
self.dialogView.layer.transform = CATransform3DConcat(currentTransform, CATransform3DMakeScale(0.6, 0.6, 1))
self.dialogView.layer.opacity = 0
}) { (finished: Bool) -> Void in
for v in self.subviews {
v.removeFromSuperview()
}
self.removeFromSuperview()
}
}
/* Creates the container view here: create the dialog, then add the custom content and buttons */
private func createContainerView() -> UIView {
let screenSize = countScreenSize()
let dialogSize = CGSizeMake(
300,
230
+ kDatePickerDialogDefaultButtonHeight
+ kDatePickerDialogDefaultButtonSpacerHeight)
// For the black background
self.frame = CGRectMake(0, 0, screenSize.width, screenSize.height)
// This is the dialog's container; we attach the custom content and the buttons to this one
let dialogContainer = UIView(frame: CGRectMake((screenSize.width - dialogSize.width) / 2, (screenSize.height - dialogSize.height) / 2, dialogSize.width, dialogSize.height))
// First, we style the dialog to match the iOS8 UIAlertView >>>
let gradient: CAGradientLayer = CAGradientLayer(layer: self.layer)
gradient.frame = dialogContainer.bounds
gradient.colors = [UIColor(red: 218/255, green: 218/255, blue: 218/255, alpha: 1).CGColor,
UIColor(red: 233/255, green: 233/255, blue: 233/255, alpha: 1).CGColor,
UIColor(red: 218/255, green: 218/255, blue: 218/255, alpha: 1).CGColor]
let cornerRadius = kDatePickerDialogCornerRadius
gradient.cornerRadius = cornerRadius
dialogContainer.layer.insertSublayer(gradient, atIndex: 0)
dialogContainer.layer.cornerRadius = cornerRadius
dialogContainer.layer.borderColor = UIColor(red: 198/255, green: 198/255, blue: 198/255, alpha: 1).CGColor
dialogContainer.layer.borderWidth = 1
dialogContainer.layer.shadowRadius = cornerRadius + 5
dialogContainer.layer.shadowOpacity = 0.1
dialogContainer.layer.shadowOffset = CGSizeMake(0 - (cornerRadius + 5) / 2, 0 - (cornerRadius + 5) / 2)
dialogContainer.layer.shadowColor = UIColor.blackColor().CGColor
dialogContainer.layer.shadowPath = UIBezierPath(roundedRect: dialogContainer.bounds, cornerRadius: dialogContainer.layer.cornerRadius).CGPath
// There is a line above the button
let lineView = UIView(frame: CGRectMake(0, dialogContainer.bounds.size.height - kDatePickerDialogDefaultButtonHeight - kDatePickerDialogDefaultButtonSpacerHeight, dialogContainer.bounds.size.width, kDatePickerDialogDefaultButtonSpacerHeight))
lineView.backgroundColor = UIColor(red: 198/255, green: 198/255, blue: 198/255, alpha: 1)
dialogContainer.addSubview(lineView)
// ˆˆˆ
//Title
self.titleLabel = UILabel(frame: CGRectMake(10, 10, 280, 30))
self.titleLabel.textAlignment = NSTextAlignment.Center
self.titleLabel.font = UIFont.boldSystemFontOfSize(17)
dialogContainer.addSubview(self.titleLabel)
self.datePicker = UIDatePicker(frame: CGRectMake(0, 30, 0, 0))
self.datePicker.autoresizingMask = UIViewAutoresizing.FlexibleRightMargin
self.datePicker.frame.size.width = 300
dialogContainer.addSubview(self.datePicker)
// Add the buttons
addButtonsToView(dialogContainer)
return dialogContainer
}
/* Add buttons to container */
private func addButtonsToView(container: UIView) {
let buttonWidth = container.bounds.size.width / 2
self.cancelButton = UIButton(type: UIButtonType.Custom) as UIButton
self.cancelButton.frame = CGRectMake(
0,
container.bounds.size.height - kDatePickerDialogDefaultButtonHeight,
buttonWidth,
kDatePickerDialogDefaultButtonHeight
)
self.cancelButton.setTitleColor(UIColor(red: 0, green: 0.5, blue: 1, alpha: 1), forState: UIControlState.Normal)
self.cancelButton.setTitleColor(UIColor(red: 0.2, green: 0.2, blue: 0.2, alpha: 0.5), forState: UIControlState.Highlighted)
self.cancelButton.titleLabel!.font = UIFont.boldSystemFontOfSize(14)
self.cancelButton.layer.cornerRadius = kDatePickerDialogCornerRadius
container.addSubview(self.cancelButton)
self.doneButton = UIButton(type: UIButtonType.Custom) as UIButton
self.doneButton.frame = CGRectMake(
buttonWidth,
container.bounds.size.height - kDatePickerDialogDefaultButtonHeight,
buttonWidth,
kDatePickerDialogDefaultButtonHeight
)
self.doneButton.tag = kDatePickerDialogDoneButtonTag
self.doneButton.setTitleColor(UIColor(red: 0, green: 0.5, blue: 1, alpha: 1), forState: UIControlState.Normal)
self.doneButton.setTitleColor(UIColor(red: 0.2, green: 0.2, blue: 0.2, alpha: 0.5), forState: UIControlState.Highlighted)
self.doneButton.titleLabel!.font = UIFont.boldSystemFontOfSize(14)
self.doneButton.layer.cornerRadius = kDatePickerDialogCornerRadius
self.doneButton.addTarget(self, action: "buttonTapped:", forControlEvents: UIControlEvents.TouchUpInside)
container.addSubview(self.doneButton)
}
func buttonTapped(sender: UIButton!) {
if sender.tag == kDatePickerDialogDoneButtonTag {
self.callback?(date: self.datePicker.date)
}
close()
}
/* Helper function: count and return the screen's size */
func countScreenSize() -> CGSize {
let screenWidth = UIScreen.mainScreen().bounds.size.width
let screenHeight = UIScreen.mainScreen().bounds.size.height
return CGSizeMake(screenWidth, screenHeight)
}
}
这里的代码定义在Viewcontroller.swift:
@IBAction func datePickerTapped(sender: AnyObject) {
DatePickerDialog().show("Select Date of Incident", doneButtonTitle: "Done", cancelButtonTitle: "Cancel", datePickerMode: .Date) {
(date) -> Void in
self.textField3.text = "\(date)"
}
}
很简单 将此行更改为
self.textField3.text = "\(date)"
至
var dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd" //format style. you can change according to yours
var dateString = dateFormatter.stringFromDate(date)
self.textField3.text = dateString