Swift 4.0:
Tạo một tệp nhanh mới. (Tệp-Mới-Tệp-Tệp Swift trống). Đặt tên nó là UIViewToast. Thêm mã sau.
import UIKit
func /(lhs: CGFloat, rhs: Int) -> CGFloat {
return lhs / CGFloat(rhs)
}
let HRToastDefaultDuration = 2.0
let HRToastFadeDuration = 0.2
let HRToastHorizontalMargin : CGFloat = 10.0
let HRToastVerticalMargin : CGFloat = 10.0
let HRToastPositionDefault = "bottom"
let HRToastPositionTop = "top"
let HRToastPositionCenter = "center"
// activity
let HRToastActivityWidth : CGFloat = 100.0
let HRToastActivityHeight : CGFloat = 100.0
let HRToastActivityPositionDefault = "center"
// image size
let HRToastImageViewWidth : CGFloat = 80.0
let HRToastImageViewHeight: CGFloat = 80.0
// label setting
let HRToastMaxWidth : CGFloat = 0.8; // 80% of parent view width
let HRToastMaxHeight : CGFloat = 0.8;
let HRToastFontSize : CGFloat = 16.0
let HRToastMaxTitleLines = 0
let HRToastMaxMessageLines = 0
// shadow appearance
let HRToastShadowOpacity : CGFloat = 0.8
let HRToastShadowRadius : CGFloat = 6.0
let HRToastShadowOffset : CGSize = CGSize(width: 4.0, height: 4.0)
let HRToastOpacity : CGFloat = 0.5
let HRToastCornerRadius : CGFloat = 10.0
var HRToastActivityView: UnsafePointer<UIView>?
var HRToastTimer: UnsafePointer<Timer>?
var HRToastView: UnsafePointer<UIView>?
// Color Scheme
let HRAppColor:UIColor = UIColor.black//UIappViewController().appUIColor
let HRAppColor_2:UIColor = UIColor.white
let HRToastHidesOnTap = true
let HRToastDisplayShadow = false
//HRToast (UIView + Toast using Swift)
extension UIView {
//public methods
func makeToast(message msg: String) {
self.makeToast(message: msg, duration: HRToastDefaultDuration, position: HRToastPositionDefault as AnyObject)
}
func makeToast(message msg: String, duration: Double, position: AnyObject) {
let toast = self.viewForMessage(msg: msg, title: nil, image: nil)
self.showToast(toast: toast!, duration: duration, position: position)
}
func makeToast(message msg: String, duration: Double, position: AnyObject, title: String) {
let toast = self.viewForMessage(msg: msg, title: title, image: nil)
self.showToast(toast: toast!, duration: duration, position: position)
}
func makeToast(message msg: String, duration: Double, position: AnyObject, image: UIImage) {
let toast = self.viewForMessage(msg: msg, title: nil, image: image)
self.showToast(toast: toast!, duration: duration, position: position)
}
func makeToast(message msg: String, duration: Double, position: AnyObject, title: String, image: UIImage) {
let toast = self.viewForMessage(msg: msg, title: title, image: image)
self.showToast(toast: toast!, duration: duration, position: position)
}
func showToast(toast: UIView) {
self.showToast(toast: toast, duration: HRToastDefaultDuration, position: HRToastPositionDefault as AnyObject)
}
func showToast(toast: UIView, duration: Double, position: AnyObject) {
let existToast = objc_getAssociatedObject(self, &HRToastView) as! UIView?
if existToast != nil {
if let timer: Timer = objc_getAssociatedObject(existToast!, &HRToastTimer) as? Timer {
timer.invalidate();
}
self.hideToast(toast: existToast!, force: false);
}
toast.center = self.centerPointForPosition(position: position, toast: toast)
toast.alpha = 0.0
if HRToastHidesOnTap {
let tapRecognizer = UITapGestureRecognizer(target: toast, action: #selector(handleToastTapped(recognizer:)))
toast.addGestureRecognizer(tapRecognizer)
toast.isUserInteractionEnabled = true;
toast.isExclusiveTouch = true;
}
self.addSubview(toast)
objc_setAssociatedObject(self, &HRToastView, toast, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN)
UIView.animate(withDuration: HRToastFadeDuration,
delay: 0.0, options: ([.curveEaseOut, .allowUserInteraction]),
animations: {
toast.alpha = 1.0
},
completion: { (finished: Bool) in
let timer = Timer.scheduledTimer(timeInterval: duration, target: self, selector: #selector(self.toastTimerDidFinish(timer:)), userInfo: toast, repeats: false)
objc_setAssociatedObject(toast, &HRToastTimer, timer, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
})
}
func makeToastActivity() {
self.makeToastActivity(position: HRToastActivityPositionDefault as AnyObject)
}
func showToastActivity() {
self.isUserInteractionEnabled = false
self.makeToastActivity()
}
func removeToastActivity() {
self.isUserInteractionEnabled = true
self.hideToastActivity()
}
func makeToastActivityWithMessage(message msg: String){
self.makeToastActivity(position: HRToastActivityPositionDefault as AnyObject, message: msg)
}
func makeToastActivityWithMessage(message msg: String,addOverlay: Bool){
self.makeToastActivity(position: HRToastActivityPositionDefault as AnyObject, message: msg,addOverlay: true)
}
func makeToastActivity(position pos: AnyObject, message msg: String = "",addOverlay overlay: Bool = false) {
let existingActivityView: UIView? = objc_getAssociatedObject(self, &HRToastActivityView) as? UIView
if existingActivityView != nil { return }
let activityView = UIView(frame: CGRect(x:0, y:0, width: self.frame.width, height: self.frame.height))
activityView.center = self.centerPointForPosition(position: pos, toast: activityView)
activityView.alpha = 0.0
activityView.autoresizingMask = ([.flexibleLeftMargin, .flexibleTopMargin, .flexibleRightMargin, .flexibleBottomMargin])
activityView.layer.cornerRadius = HRToastCornerRadius
if HRToastDisplayShadow {
activityView.layer.shadowColor = UIColor.black.cgColor
activityView.layer.shadowOpacity = Float(HRToastShadowOpacity)
activityView.layer.shadowRadius = HRToastShadowRadius
activityView.layer.shadowOffset = HRToastShadowOffset
}
let activityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: .whiteLarge)
activityIndicatorView.center = CGPoint(x:activityView.bounds.size.width / 2, y: activityView.bounds.size.height / 2)
activityIndicatorView.color = HRAppColor
activityView.addSubview(activityIndicatorView)
activityIndicatorView.startAnimating()
if (!msg.isEmpty){
activityIndicatorView.frame.origin.y -= 10
let activityMessageLabel = UILabel(frame: CGRect(x: activityView.bounds.origin.x, y: (activityIndicatorView.frame.origin.y + activityIndicatorView.frame.size.height + 10), width: activityView.bounds.size.width, height: 20))
activityMessageLabel.textColor = UIColor.white
activityMessageLabel.font = (msg.count<=10) ? UIFont(name:activityMessageLabel.font.fontName, size: 16) : UIFont(name:activityMessageLabel.font.fontName, size: 16)
activityMessageLabel.textAlignment = .center
activityMessageLabel.text = msg + ".."
if overlay {
activityMessageLabel.textColor = UIColor.white
activityView.backgroundColor = HRAppColor.withAlphaComponent(HRToastOpacity)
activityIndicatorView.color = UIColor.white
}
else {
activityMessageLabel.textColor = HRAppColor
activityView.backgroundColor = UIColor.clear
activityIndicatorView.color = HRAppColor
}
activityView.addSubview(activityMessageLabel)
}
self.addSubview(activityView)
// associate activity view with self
objc_setAssociatedObject(self, &HRToastActivityView, activityView, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
UIView.animate(withDuration: HRToastFadeDuration,
delay: 0.0,
options: UIViewAnimationOptions.curveEaseOut,
animations: {
activityView.alpha = 1.0
},
completion: nil)
self.isUserInteractionEnabled = false
}
func hideToastActivity() {
self.isUserInteractionEnabled = true
let existingActivityView = objc_getAssociatedObject(self, &HRToastActivityView) as! UIView?
if existingActivityView == nil { return }
UIView.animate(withDuration: HRToastFadeDuration,
delay: 0.0,
options: UIViewAnimationOptions.curveEaseOut,
animations: {
existingActivityView!.alpha = 0.0
},
completion: { (finished: Bool) in
existingActivityView!.removeFromSuperview()
objc_setAssociatedObject(self, &HRToastActivityView, nil, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
})
}
/*
* private methods (helper)
*/
func hideToast(toast: UIView) {
self.isUserInteractionEnabled = true
self.hideToast(toast: toast, force: false);
}
func hideToast(toast: UIView, force: Bool) {
let completeClosure = { (finish: Bool) -> () in
toast.removeFromSuperview()
objc_setAssociatedObject(self, &HRToastTimer, nil, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
if force {
completeClosure(true)
} else {
UIView.animate(withDuration: HRToastFadeDuration,
delay: 0.0,
options: ([.curveEaseIn, .beginFromCurrentState]),
animations: {
toast.alpha = 0.0
},
completion:completeClosure)
}
}
@objc func toastTimerDidFinish(timer: Timer) {
self.hideToast(toast: timer.userInfo as! UIView)
}
@objc func handleToastTapped(recognizer: UITapGestureRecognizer) {
// var timer = objc_getAssociatedObject(self, &HRToastTimer) as! NSTimer
// timer.invalidate()
self.hideToast(toast: recognizer.view!)
}
func centerPointForPosition(position: AnyObject, toast: UIView) -> CGPoint {
if position is String {
let toastSize = toast.bounds.size
let viewSize = self.bounds.size
if position.lowercased == HRToastPositionTop {
return CGPoint(x: viewSize.width/2, y: toastSize.height/2 + HRToastVerticalMargin)
} else if position.lowercased == HRToastPositionDefault {
return CGPoint(x:viewSize.width/2, y:viewSize.height - toastSize.height - 15 - HRToastVerticalMargin)
} else if position.lowercased == HRToastPositionCenter {
return CGPoint(x:viewSize.width/2, y:viewSize.height/2)
}
} else if position is NSValue {
return position.cgPointValue
}
print("Warning: Invalid position for toast.")
return self.centerPointForPosition(position: HRToastPositionDefault as AnyObject, toast: toast)
}
func viewForMessage(msg: String?, title: String?, image: UIImage?) -> UIView? {
if msg == nil && title == nil && image == nil { return nil }
var msgLabel: UILabel?
var titleLabel: UILabel?
var imageView: UIImageView?
let wrapperView = UIView()
wrapperView.autoresizingMask = ([.flexibleLeftMargin, .flexibleRightMargin, .flexibleTopMargin, .flexibleBottomMargin])
wrapperView.layer.cornerRadius = HRToastCornerRadius
wrapperView.backgroundColor = UIColor.black.withAlphaComponent(HRToastOpacity)
if HRToastDisplayShadow {
wrapperView.layer.shadowColor = UIColor.black.cgColor
wrapperView.layer.shadowOpacity = Float(HRToastShadowOpacity)
wrapperView.layer.shadowRadius = HRToastShadowRadius
wrapperView.layer.shadowOffset = HRToastShadowOffset
}
if image != nil {
imageView = UIImageView(image: image)
imageView!.contentMode = .scaleAspectFit
imageView!.frame = CGRect(x:HRToastHorizontalMargin, y: HRToastVerticalMargin, width: CGFloat(HRToastImageViewWidth), height: CGFloat(HRToastImageViewHeight))
}
var imageWidth: CGFloat, imageHeight: CGFloat, imageLeft: CGFloat
if imageView != nil {
imageWidth = imageView!.bounds.size.width
imageHeight = imageView!.bounds.size.height
imageLeft = HRToastHorizontalMargin
} else {
imageWidth = 0.0; imageHeight = 0.0; imageLeft = 0.0
}
if title != nil {
titleLabel = UILabel()
titleLabel!.numberOfLines = HRToastMaxTitleLines
titleLabel!.font = UIFont.boldSystemFont(ofSize: HRToastFontSize)
titleLabel!.textAlignment = .center
titleLabel!.lineBreakMode = .byWordWrapping
titleLabel!.textColor = UIColor.white
titleLabel!.backgroundColor = UIColor.clear
titleLabel!.alpha = 1.0
titleLabel!.text = title
// size the title label according to the length of the text
let maxSizeTitle = CGSize(width: (self.bounds.size.width * HRToastMaxWidth) - imageWidth, height: self.bounds.size.height * HRToastMaxHeight)
let expectedHeight = title!.stringHeightWithFontSize(fontSize: HRToastFontSize, width: maxSizeTitle.width)
titleLabel!.frame = CGRect(x: 0.0, y: 0.0, width: maxSizeTitle.width, height: expectedHeight)
}
if msg != nil {
msgLabel = UILabel();
msgLabel!.numberOfLines = HRToastMaxMessageLines
msgLabel!.font = UIFont.systemFont(ofSize: HRToastFontSize)
msgLabel!.lineBreakMode = .byWordWrapping
msgLabel!.textAlignment = .center
msgLabel!.textColor = UIColor.white
msgLabel!.backgroundColor = UIColor.clear
msgLabel!.alpha = 1.0
msgLabel!.text = msg
let maxSizeMessage = CGSize(width: (self.bounds.size.width * HRToastMaxWidth) - imageWidth, height: self.bounds.size.height * HRToastMaxHeight)
let expectedHeight = msg!.stringHeightWithFontSize(fontSize: HRToastFontSize, width: maxSizeMessage.width)
msgLabel!.frame = CGRect(x: 0.0, y: 0.0, width: maxSizeMessage.width, height: expectedHeight)
}
var titleWidth: CGFloat, titleHeight: CGFloat, titleTop: CGFloat, titleLeft: CGFloat
if titleLabel != nil {
titleWidth = titleLabel!.bounds.size.width
titleHeight = titleLabel!.bounds.size.height
titleTop = HRToastVerticalMargin
titleLeft = imageLeft + imageWidth + HRToastHorizontalMargin
} else {
titleWidth = 0.0; titleHeight = 0.0; titleTop = 0.0; titleLeft = 0.0
}
var msgWidth: CGFloat, msgHeight: CGFloat, msgTop: CGFloat, msgLeft: CGFloat
if msgLabel != nil {
msgWidth = msgLabel!.bounds.size.width
msgHeight = msgLabel!.bounds.size.height
msgTop = titleTop + titleHeight + HRToastVerticalMargin
msgLeft = imageLeft + imageWidth + HRToastHorizontalMargin
} else {
msgWidth = 0.0; msgHeight = 0.0; msgTop = 0.0; msgLeft = 0.0
}
let largerWidth = max(titleWidth, msgWidth)
let largerLeft = max(titleLeft, msgLeft)
// set wrapper view's frame
let wrapperWidth = max(imageWidth + HRToastHorizontalMargin * 2, largerLeft + largerWidth + HRToastHorizontalMargin)
let wrapperHeight = max(msgTop + msgHeight + HRToastVerticalMargin, imageHeight + HRToastVerticalMargin * 2)
wrapperView.frame = CGRect(x: 0.0, y: 0.0, width: wrapperWidth, height: wrapperHeight)
// add subviews
if titleLabel != nil {
titleLabel!.frame = CGRect(x: titleLeft, y: titleTop, width: titleWidth, height: titleHeight)
wrapperView.addSubview(titleLabel!)
}
if msgLabel != nil {
msgLabel!.frame = CGRect(x: msgLeft, y: msgTop, width: msgWidth, height: msgHeight)
wrapperView.addSubview(msgLabel!)
}
if imageView != nil {
wrapperView.addSubview(imageView!)
}
return wrapperView
}
}
extension String {
func stringHeightWithFontSize(fontSize: CGFloat,width: CGFloat) -> CGFloat {
let font = UIFont.systemFont(ofSize: fontSize)
let size = CGSize(width: width, height: CGFloat.greatestFiniteMagnitude)
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineBreakMode = .byWordWrapping;
let attributes = [NSAttributedStringKey.font:font,
NSAttributedStringKey.paragraphStyle:paragraphStyle.copy()]
let text = self as NSString
let rect = text.boundingRect(with: size, options:.usesLineFragmentOrigin, attributes: attributes, context:nil)
return rect.size.height
}
}
Sử dụng:
self.view.makeToast(message: "Simple Toast")
self.view.makeToast(message: "Simple Toast", duration: 2.0, position:HRToastPositionTop)
self.view.makeToast(message: "Simple Toast", duration: 2.0, position: HRToastPositionCenter, image: UIImage(named: "ic_120x120")!)
self.view.makeToast(message: "It is just awesome", duration: 2.0, position: HRToastPositionDefault, title: "Simple Toast")
self.view.makeToast(message: "It is just awesome", duration: 2.0, position: HRToastPositionCenter, title: "Simple Toast", image: UIImage(named: "ic_120x120")!)
self.view.makeToastActivity()
self.view.makeToastActivity(position: HRToastPositionCenter)
self.view.makeToastActivity(position: HRToastPositionDefault, message: "Loading")
self.view.makeToastActivityWithMessage(message: "Loading")
// Hide Toast
self.view.hideToast(toast: self.view)
self.view.hideToast(toast: self.view, force: true)
self.view.hideToastActivity()
