如何在Swift中添加消息？

Question

有没有办法在swift中提供Toast消息？

我已尝试过目标c,但无法在swift中找到解决方案.

[self.view makeToast:@"Account created Successfully"
                     duration:0.5
                     position:@"bottom"];

Answer 1

extension UIViewController {

func showToast(message : String, font: UIFont) {

    let toastLabel = UILabel(frame: CGRect(x: self.view.frame.size.width/2 - 75, y: self.view.frame.size.height-100, width: 150, height: 35))
    toastLabel.backgroundColor = UIColor.black.withAlphaComponent(0.6)
    toastLabel.textColor = UIColor.white
    toastLabel.font = font
    toastLabel.textAlignment = .center;
    toastLabel.text = message
    toastLabel.alpha = 1.0
    toastLabel.layer.cornerRadius = 10;
    toastLabel.clipsToBounds  =  true
    self.view.addSubview(toastLabel)
    UIView.animate(withDuration: 4.0, delay: 0.1, options: .curveEaseOut, animations: {
         toastLabel.alpha = 0.0
    }, completion: {(isCompleted) in
        toastLabel.removeFromSuperview()
    })
} }

Answer 2

对于Swift 4

我的Toast版本使用了布局约束,其优点是适用于任何文本大小(基于Tony Franzis的响应):

只需致电: Toast.show(message: "My message", myViewControllerName)

class Toast {
    static func show(message: String, controller: UIViewController) {
        let toastContainer = UIView(frame: CGRect())
        toastContainer.backgroundColor = UIColor.black.withAlphaComponent(0.6)
        toastContainer.alpha = 0.0
        toastContainer.layer.cornerRadius = 25;
        toastContainer.clipsToBounds  =  true

        let toastLabel = UILabel(frame: CGRect())
        toastLabel.textColor = UIColor.white
        toastLabel.textAlignment = .center;
        toastLabel.font.withSize(12.0)
        toastLabel.text = message
        toastLabel.clipsToBounds  =  true
        toastLabel.numberOfLines = 0

        toastContainer.addSubview(toastLabel)
        controller.view.addSubview(toastContainer)

        toastLabel.translatesAutoresizingMaskIntoConstraints = false
        toastContainer.translatesAutoresizingMaskIntoConstraints = false

        let a1 = NSLayoutConstraint(item: toastLabel, attribute: .leading, relatedBy: .equal, toItem: toastContainer, attribute: .leading, multiplier: 1, constant: 15)
        let a2 = NSLayoutConstraint(item: toastLabel, attribute: .trailing, relatedBy: .equal, toItem: toastContainer, attribute: .trailing, multiplier: 1, constant: -15)
        let a3 = NSLayoutConstraint(item: toastLabel, attribute: .bottom, relatedBy: .equal, toItem: toastContainer, attribute: .bottom, multiplier: 1, constant: -15)
        let a4 = NSLayoutConstraint(item: toastLabel, attribute: .top, relatedBy: .equal, toItem: toastContainer, attribute: .top, multiplier: 1, constant: 15)
        toastContainer.addConstraints([a1, a2, a3, a4])

        let c1 = NSLayoutConstraint(item: toastContainer, attribute: .leading, relatedBy: .equal, toItem: controller.view, attribute: .leading, multiplier: 1, constant: 65)
        let c2 = NSLayoutConstraint(item: toastContainer, attribute: .trailing, relatedBy: .equal, toItem: controller.view, attribute: .trailing, multiplier: 1, constant: -65)
        let c3 = NSLayoutConstraint(item: toastContainer, attribute: .bottom, relatedBy: .equal, toItem: controller.view, attribute: .bottom, multiplier: 1, constant: -75)
        controller.view.addConstraints([c1, c2, c3])

        UIView.animate(withDuration: 0.5, delay: 0.0, options: .curveEaseIn, animations: {
            toastContainer.alpha = 1.0
        }, completion: { _ in
            UIView.animate(withDuration: 0.5, delay: 1.5, options: .curveEaseOut, animations: {
                toastContainer.alpha = 0.0
            }, completion: {_ in
                toastContainer.removeFromSuperview()
            })
        })
    }
}

Answer 3

斯威夫特4

func showToast(message : String) {

    let toastLabel = UILabel(frame: CGRect(x: self.view.frame.size.width/2 - 75, y: self.view.frame.size.height-100, width: 150, height: 35))
    toastLabel.backgroundColor = UIColor.black.withAlphaComponent(0.6)
    toastLabel.textColor = UIColor.white
    toastLabel.textAlignment = .center;
    toastLabel.font = UIFont(name: "Montserrat-Light", size: 12.0)
    toastLabel.text = message
    toastLabel.alpha = 1.0
    toastLabel.layer.cornerRadius = 10;
    toastLabel.clipsToBounds  =  true
    self.view.addSubview(toastLabel)
    UIView.animate(withDuration: 4.0, delay: 0.1, options: .curveEaseOut, animations: {
        toastLabel.alpha = 0.0
    }, completion: {(isCompleted) in
        toastLabel.removeFromSuperview()
    })
}

像这样调用函数

self.showToast(message: "Data Save.")

Answer 4

只需添加以下方法.这将以动画显示不同颜色的消息(消息从左到右显示并消失).

Swift 3.0 -

class Toast
{
    class private func showAlert(backgroundColor:UIColor, textColor:UIColor, message:String)
    {

        let appDelegate: AppDelegate = UIApplication.shared.delegate as! AppDelegate
        let label = UILabel(frame: CGRect.zero)
        label.textAlignment = NSTextAlignment.center
        label.text = message
        label.font = UIFont(name: "", size: 15)
        label.adjustsFontSizeToFitWidth = true

        label.backgroundColor =  backgroundColor //UIColor.whiteColor()
        label.textColor = textColor //TEXT COLOR

        label.sizeToFit()
        label.numberOfLines = 4
        label.layer.shadowColor = UIColor.gray.cgColor
        label.layer.shadowOffset = CGSize(width: 4, height: 3)
        label.layer.shadowOpacity = 0.3
        label.frame = CGRect(x: appDelegate.window!.frame.size.width, y: 64, width: appDelegate.window!.frame.size.width, height: 44)

        label.alpha = 1

        appDelegate.window!.addSubview(label)

        var basketTopFrame: CGRect = label.frame;
        basketTopFrame.origin.x = 0;

        UIView.animate(withDuration
            :2.0, delay: 0.0, usingSpringWithDamping: 0.5, initialSpringVelocity: 0.1, options: UIViewAnimationOptions.curveEaseOut, animations: { () -> Void in
                label.frame = basketTopFrame
        },  completion: {
            (value: Bool) in
            UIView.animate(withDuration:2.0, delay: 2.0, usingSpringWithDamping: 0.5, initialSpringVelocity: 0.1, options: UIViewAnimationOptions.curveEaseIn, animations: { () -> Void in
                label.alpha = 0
            },  completion: {
                (value: Bool) in
                label.removeFromSuperview()
            })
        })
    }

    class func showPositiveMessage(message:String)
    {
        showAlert(backgroundColor: UIColor.green, textColor: UIColor.white, message: message)
    }
    class func showNegativeMessage(message:String)
    {
        showAlert(backgroundColor: UIColor.red, textColor: UIColor.white, message: message)
    }
}

Answer 5

有一个第三方库,支持单行代码的可自定义Toast通知.这是一个简单的例子:

import Toast_Swift

...

// basic usage
self.view.makeToast("This is a piece of toast")

// toast with a specific duration and position
self.view.makeToast("This is a piece of toast", duration: 3.0, position: .top)

https://github.com/scalessec/Toast-Swift

(更新为Swift 3/4 +)

Answer 6

我在 Swift 5 上还有两个解决方案：

最佳解决方案（在我看来）

优势：

1. 旋转屏幕时正常工作。
2. 约束用于定位。
3. 与 SafeArea 一起正常工作。

缺点：

1. 需要扩展UILabel类以添加缩进。人们可以通过将没有这个做UILabel的UIVIew。

代码：

class ToastLabel: UILabel {
    var textInsets = UIEdgeInsets.zero {
        didSet { invalidateIntrinsicContentSize() }
    }

    override func textRect(forBounds bounds: CGRect, limitedToNumberOfLines numberOfLines: Int) -> CGRect {
        let insetRect = bounds.inset(by: textInsets)
        let textRect = super.textRect(forBounds: insetRect, limitedToNumberOfLines: numberOfLines)
        let invertedInsets = UIEdgeInsets(top: -textInsets.top, left: -textInsets.left, bottom: -textInsets.bottom, right: -textInsets.right)

        return textRect.inset(by: invertedInsets)
    }

    override func drawText(in rect: CGRect) {
        super.drawText(in: rect.inset(by: textInsets))
    }
}

extension UIViewController {
    static let DELAY_SHORT = 1.5
    static let DELAY_LONG = 3.0

    func showToast(_ text: String, delay: TimeInterval = DELAY_LONG) {
        let label = ToastLabel()
        label.backgroundColor = UIColor(white: 0, alpha: 0.5)
        label.textColor = .white
        label.textAlignment = .center
        label.font = UIFont.systemFont(ofSize: 15)
        label.alpha = 0
        label.text = text
        label.clipsToBounds = true
        label.layer.cornerRadius = 20
        label.numberOfLines = 0
        label.textInsets = UIEdgeInsets(top: 10, left: 15, bottom: 10, right: 15)
        label.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(label)

        let saveArea = view.safeAreaLayoutGuide
        label.centerXAnchor.constraint(equalTo: saveArea.centerXAnchor, constant: 0).isActive = true
        label.leadingAnchor.constraint(greaterThanOrEqualTo: saveArea.leadingAnchor, constant: 15).isActive = true
        label.trailingAnchor.constraint(lessThanOrEqualTo: saveArea.trailingAnchor, constant: -15).isActive = true
        label.bottomAnchor.constraint(equalTo: saveArea.bottomAnchor, constant: -30).isActive = true

        UIView.animate(withDuration: 0.5, delay: 0, options: .curveEaseIn, animations: {
            label.alpha = 1
        }, completion: { _ in
            UIView.animate(withDuration: 0.5, delay: delay, options: .curveEaseOut, animations: {
                label.alpha = 0
            }, completion: {_ in
                label.removeFromSuperview()
            })
        })
    }
}

如何使用：

class MyController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()

        showToast("Message")
    }
}

其他解决方案

优势：

1. 在这个版本中，我不使用绑定 UIViewController

缺点：

1. 屏幕旋转后，标签不会移动。
2. 不能正确处理多行字符串。

代码：

class Helper {
    static let DELAY_SHORT = 1.5
    static let DELAY_LONG = 3.0

    static func showToast(_ text: String, delay: TimeInterval = DELAY_LONG) {
        guard let window = UIApplication.shared.keyWindow else {
            return
        }

        let label = BaseLabel()
        label.backgroundColor = UIColor(white: 0, alpha: 0.5)
        label.textColor = .white
        label.textAlignment = .center
        label.font = UIFont.systemFont(ofSize: 15)
        label.alpha = 0
        label.text = text
        label.numberOfLines = 0

        var vertical: CGFloat = 0
        var size = label.intrinsicContentSize
        var width = min(size.width, window.frame.width - 60)
        if width != size.width {
            vertical = 10
            label.textAlignment = .justified
        }
        label.textInsets = UIEdgeInsets(top: vertical, left: 15, bottom: vertical, right: 15)

        size = label.intrinsicContentSize
        width = min(size.width, window.frame.width - 60)

        label.frame = CGRect(x: 20, y: window.frame.height - 90, width: width, height: size.height + 20)
        label.center.x = window.center.x
        label.layer.cornerRadius = min(label.frame.height/2, 25)
        label.layer.masksToBounds = true
        window.addSubview(label)

        UIView.animate(withDuration: 0.5, delay: 0, options: .curveEaseIn, animations: {
            label.alpha = 1
        }, completion: { _ in
            UIView.animate(withDuration: 0.5, delay: delay, options: .curveEaseOut, animations: {
                label.alpha = 0
            }, completion: {_ in
                label.removeFromSuperview()
            })
        })
    }
}

如何使用：

Helper.showToast("Message")

Answer 7

Swift 5. 如果你想要一个简单的 toast 实现，请找到下面的代码。

extension UIViewController{

func showToast(message : String, seconds: Double){
        let alert = UIAlertController(title: nil, message: message, preferredStyle: .alert)
        alert.view.backgroundColor = .black
        alert.view.alpha = 0.5
        alert.view.layer.cornerRadius = 15
        self.present(alert, animated: true)
        DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + seconds) {
            alert.dismiss(animated: true)
        }
    }
 }

从 UIViewController 调用它

  self.showToast(message: "Updating...", seconds: 1.0)

Answer 8

你究竟需要的是https://github.com/Rannie/Toast-Swift/blob/master/SwiftToastDemo/Toast/HRToast%2BUIView.swift.

下载HRToast + UIView.swift类并拖放到项目中.确保在对话框中选中"如果需要,复制项目".

  //Usage:
  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")

Answer 9

每当我需要像Android这样的Toast消息时，我就一直在使用此扩展。只需将扩展复制到您的项目中，然后在您的UIViewController类中，调用类似

self.toastMessage("Downloading...") 
// Extention is below

extension UIViewController {
  func toastMessage(_ message: String){
    guard let window = UIApplication.shared.keyWindow else {return}
    let messageLbl = UILabel()
    messageLbl.text = message
    messageLbl.textAlignment = .center
    messageLbl.font = UIFont.systemFont(ofSize: 12)
    messageLbl.textColor = .white
    messageLbl.backgroundColor = UIColor(white: 0, alpha: 0.5)

    let textSize:CGSize = messageLbl.intrinsicContentSize
    let labelWidth = min(textSize.width, window.frame.width - 40)

    messageLbl.frame = CGRect(x: 20, y: window.frame.height - 90, width: labelWidth + 30, height: textSize.height + 20)
    messageLbl.center.x = window.center.x
    messageLbl.layer.cornerRadius = messageLbl.frame.height/2
    messageLbl.layer.masksToBounds = true
    window.addSubview(messageLbl)

    DispatchQueue.main.asyncAfter(deadline: .now() + 1) {

    UIView.animate(withDuration: 1, animations: {
        messageLbl.alpha = 0
    }) { (_) in
        messageLbl.removeFromSuperview()
    }
    }
}}

Answer 10

If the need is for a simple Toast message without fancy customization of font, alignment, text color, etc. then the following would do just fine

let messageVC = UIAlertController(title: "Message Title", message: "Account Created successfully" , preferredStyle: .actionSheet)
present(messageVC, animated: true) {
                Timer.scheduledTimer(withTimeInterval: 0.5, repeats: false, block: { (_) in
                    messageVC.dismiss(animated: true, completion: nil)})}

.actionSheet presents the alert from Bottom of the screen and the Timer takes care of the display duration. You can add this as an extension to UIViewController and then call it from anywhere.

Answer 11

如果makeToast:duration:position:在 Objective-C 中定义并且可以被调用，那么 swift 代码将是

self.view.makeToast("Acount created Successfully", duration: 0.5, position: "bottom")

不过，您可能需要使用桥接标头来访问 swift 代码中的这些方法。