有什么办法可以迅速烤面包？
我已经在目标c中进行了尝试，但没有迅速找到解决方案。
[self.view makeToast:@"Account created Successfully"
duration:0.5
position:@"bottom"];
Answers:
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()
})
} }
像这样使用：
self.showToast(message: "Your Toast Message", font: .systemFont(ofSize: 12.0))
对于Swift 4
我使用布局约束的Toast版本，其优点是可以按任意大小使用文本（基于Tony Franzis的回复）：
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()
})
})
}
}
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.")
toastLabel.alpha = 0.0然后做以下动画： UIView.animate(withDuration: 0.5, delay: 0.0, options: .curveEaseIn, animations: { toastLabel.alpha = 1.0 }, completion: { _ in UIView.animate(withDuration: 0.5, delay: 1.5, options: .curveEaseOut, animations: { toastLabel.alpha = 0.0 }, completion: {_ in toastLabel.removeFromSuperview() }) })
只需添加以下方法。这将通过动画以不同的颜色显示消息（消息从左到右出现并消失）。
斯威夫特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)
}
}
您真正需要的是https://github.com/Rannie/Toast-Swift/blob/master/SwiftToastDemo/Toast/HRToast%2BUIView.swift。
下载HRToast + UIView.swift类并将其拖放到项目中。确保在对话框上选中“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")
self.view.hr_setToastThemeColor(color: #ThemeColor)出现错误
有一个第三方库，支持使用单行代码进行自定义的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
（已更新为Swift 3/4 +）
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()
}
}
}}
我在Swift 5上还有两个解决方案：
最佳解决方案（我认为）
优点：
缺点：
UILabel类以添加缩进。如果没有此功能，可以将放置在UILabel中UIVIew。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
优点：
UIViewController缺点：
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")
label.heightAnchor.constraint(equalToConstant: 35).active = true以设置视图高度，以便标签在文本上方和下方保留间距。
Swift 5，如果您想使用简单的烤面包，请在下面找到代码。
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
self.showToast(message: "Updating...", seconds: 1.0)
如果只需要简单的Toast消息，而无需自定义字体，对齐方式，文本颜色等，那么下面的方法就可以了
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从屏幕底部显示警报，计时器负责显示持续时间。您可以将其添加为UIViewController的扩展，然后从任何地方调用它。
@ mr-bean代码已更新为最新的Swift版本（3.x）
let toastLabel =
UILabel(frame:
CGRect(x: self.view.frame.size.width/2 - 150,
y: self.view.frame.size.height-100,
width: 300,
height: 35))
toastLabel.backgroundColor = UIColor.black
toastLabel.textColor = UIColor.white
toastLabel.textAlignment = NSTextAlignment.center
self.view.addSubview(toastLabel)
toastLabel.text = message
toastLabel.alpha = 1.0
toastLabel.layer.cornerRadius = 10;
toastLabel.clipsToBounds = true
UIView.animate(withDuration: 4.0, animations: {
toastLabel.alpha = 0.0
})
我用以下方式修改了@samo的答案：
正确的变量名称
前导约束和尾随约束更改为中心约束。
现在，消息将根据消息调整其宽度，并将其居中。
extension UIViewController {
func showToast(message: String) {
let toastContainer = UIView(frame: CGRect())
toastContainer.backgroundColor = UIColor.black.withAlphaComponent(0.6)
toastContainer.alpha = 0.0
toastContainer.layer.cornerRadius = 20;
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)
self.view.addSubview(toastContainer)
toastLabel.translatesAutoresizingMaskIntoConstraints = false
toastContainer.translatesAutoresizingMaskIntoConstraints = false
let centerX = NSLayoutConstraint(item: toastLabel, attribute: .centerX, relatedBy: .equal, toItem: toastContainer, attribute: .centerXWithinMargins, multiplier: 1, constant: 0)
let lableBottom = NSLayoutConstraint(item: toastLabel, attribute: .bottom, relatedBy: .equal, toItem: toastContainer, attribute: .bottom, multiplier: 1, constant: -15)
let lableTop = NSLayoutConstraint(item: toastLabel, attribute: .top, relatedBy: .equal, toItem: toastContainer, attribute: .top, multiplier: 1, constant: 15)
toastContainer.addConstraints([centerX, lableBottom, lableTop])
let containerCenterX = NSLayoutConstraint(item: toastContainer, attribute: .centerX, relatedBy: .equal, toItem: self.view, attribute: .centerX, multiplier: 1, constant: 0)
let containerTrailing = NSLayoutConstraint(item: toastContainer, attribute: .width, relatedBy: .equal, toItem: toastLabel, attribute: .width, multiplier: 1.1, constant: 0)
let containerBottom = NSLayoutConstraint(item: toastContainer, attribute: .bottom, relatedBy: .equal, toItem: self.view, attribute: .bottom, multiplier: 1, constant: -75)
self.view.addConstraints([containerCenterX,containerTrailing, containerBottom])
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()
})
})
}
}
而不是UILabel使用UITextView获得更好的结果。
func showToast(message: String) {
let toastLabel = UITextView(frame: CGRect(x: self.view.frame.size.width/16, y: self.view.frame.size.height-150, width: self.view.frame.size.width * 7/8, height: 35))
toastLabel.backgroundColor = UIColor.black.withAlphaComponent(0.6)
toastLabel.textColor = UIColor.white
toastLabel.textAlignment = .center;
toastLabel.text = " \(message) "
toastLabel.alpha = 1.0
toastLabel.layer.cornerRadius = 10;
toastLabel.clipsToBounds = true
toastLabel.font = UIFont(name: (toastLabel.font?.fontName)!, size: 16)
toastLabel.layoutEdgeInsets.left = 8
toastLabel.layoutEdgeInsets.right = 8
toastLabel.center.x = self.view.frame.size.width/2
self.view.addSubview(toastLabel)
UIView.animate(withDuration: 5.0, delay: 0.1, options: .curveEaseOut, animations: {
toastLabel.alpha = 0.0
}, completion: {(isCompleted) in
toastLabel.removeFromSuperview()
})
}
消息中添加了空格，以在两端提供良好的间距，从而看起来不错。豆先生的答案的修改后的版本
我知道有公认的答案，但它们似乎都存在很大缺陷-如果您在短时间内展示多个吐司，它们将彼此重叠。这是我的实现，其中考虑了此问题：
class Toast: UILabel {
private let BOTTOM_MARGIN: CGFloat = 16
private let SIDE_MARGIN: CGFloat = 16
private let HEIGHT: CGFloat = 35
private let SHOW_TIME_SECONDS = TimeInterval(3)
private let BACKGROUND_COLOR = UIColor.darkGray.withAlphaComponent(0.7).cgColor
private let TEXT_COLOR = UIColor.white
private let ANIMATION_DURATION_SEC = 0.33
private static var queue: [ToastHolder] = []
private static var showing: Toast?
init(_ text: String) {
super.init(frame: CGRect(x: 0, y: 0, width: 0, height: 0))
self.text = text
self.textColor = TEXT_COLOR
textAlignment = .center
self.layer.backgroundColor = BACKGROUND_COLOR
self.layer.cornerRadius = 5
}
public func show(_ parent: UIViewController) {
frame = CGRect(x: SIDE_MARGIN, y: UIScreen.main.bounds.height - BOTTOM_MARGIN - HEIGHT, width: UIScreen.main.bounds.width - 2 * SIDE_MARGIN, height: HEIGHT)
if Toast.showing == nil {
Log.d("showing \(String(describing: text))")
Toast.showing = self
alpha = 0
parent.view.addSubview(self)
UIView.animate(withDuration: ANIMATION_DURATION_SEC, animations: {
self.alpha = 1
}, completion: { (completed) in
Timer.scheduledTimer(timeInterval: self.SHOW_TIME_SECONDS, target: self, selector: #selector(self.onTimeout), userInfo: nil, repeats: false)
})
} else {
Toast.queue.append(ToastHolder(self, parent))
}
}
@objc func onTimeout() {
UIView.animate(withDuration: ANIMATION_DURATION_SEC, animations: {
self.alpha = 0
}, completion: { (completed) in
Toast.showing = nil
self.removeFromSuperview()
if !Toast.queue.isEmpty {
let holder = Toast.queue.removeFirst()
holder.toast.show(holder.parent)
}
})
}
required init?(coder aDecoder: NSCoder) {
fatalError("this initializer is not supported")
}
private class ToastHolder {
let toast: Toast
let parent: UIViewController
init(_ t: Toast, _ p: UIViewController) {
toast = t
parent = p
}
}
}
用法：
Toast("my message").show(self)
希望它能帮助某人。
如何使用烤面包机
乍看上去
Toast(text: "Hello, world!").show()
设置延迟和持续时间
Toast(text: "Hello, world!", duration: Delay.long)
Toast(text: "Hello, world!", delay: Delay.short, duration: Delay.long)
去除吐司
let toast = Toast(text: "Hello")
toast.show()
toast.cancel() // remove toast immediately
自定义外观
static func popUp(context ctx: UIViewController, msg: String) {
let toast = UILabel(frame:
CGRect(x: 16, y: ctx.view.frame.size.height / 2,
width: ctx.view.frame.size.width - 32, height: 100))
toast.backgroundColor = UIColor.lightGray
toast.textColor = UIColor.white
toast.textAlignment = .center;
toast.numberOfLines = 3
toast.font = UIFont.systemFont(ofSize: 20)
toast.layer.cornerRadius = 12;
toast.clipsToBounds = true
toast.text = msg
ctx.view.addSubview(toast)
UIView.animate(withDuration: 5.0, delay: 0.2,
options: .curveEaseOut, animations: {
toast.alpha = 0.0
}, completion: {(isCompleted) in
toast.removeFromSuperview()
})
}
然后从UIViewController调用它
popUp(context: self, msg: "Your message")
让我将其添加到以下答案链中：该库完成了您需要的DCToastView，使您可以从屏幕的顶部或底部提供烤面包消息：
您只需要添加豆荚
pod 'DCToastView'
将其导入您要使用的位置。
import DCToastView
并使用它
ToastPresenter.shared.show(in: self.view, message: "This is a toast")
您可以将以下属性传递给show方法：
这将为您提供帮助，使烤面包以适当的填充物居中
func showToast(message:String,view:UIView){
let toastLabel = PaddingLabel()
toastLabel.frame = CGRect(x:0, y: view.frame.size.height-100, width: view.frame.width-50, height: 0)
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
toastLabel.sizeToFit()
toastLabel.frame.origin.x=(view.frame.width/2)-(toastLabel.frame.width/2)
view.addSubview(toastLabel)
UIView.animate(withDuration: 4.0, delay: 0.1, options: .curveEaseOut, animations: {
toastLabel.alpha = 0.0
}, completion: {(isCompleted) in
toastLabel.removeFromSuperview()
})
}
并添加此PaddingLabel文件以进行标签填充
import Foundation
import UIKit
class PaddingLabel: UILabel {
let padding=UIEdgeInsetsMake(5, 10, 5,10)
override func drawText(in rect: CGRect) {
super.drawText(in: UIEdgeInsetsInsetRect(rect, padding))
}
override func sizeThatFits(_ size: CGSize) -> CGSize {
let superSizeThatFits=super.sizeThatFits(size)
let width=superSizeThatFits.width+padding.left+padding.right
let height=superSizeThatFits.height+padding.top+padding.bottom
return CGSize(width: width, height: height)
}
}
Beans先生的回答很好。但是，他的答案使用的宽度较小，并且不是多行友好的。改用它。
func showToastFaded(message : String) {
let toastLabel = UILabel(frame: CGRect(x: self.view.frame.size.width/2 - 125, y: self.view.frame.size.height-100, width: 250, height: 35))
toastLabel.numberOfLines = 0
toastLabel.backgroundColor = UIColor.black.withAlphaComponent(0.6)
toastLabel.textColor = UIColor.white
toastLabel.textAlignment = .center;
toastLabel.text = message
toastLabel.alpha = 1.0
toastLabel.layer.cornerRadius = 10;
toastLabel.clipsToBounds = true
toastLabel.sizeToFit()
toastLabel.frame = CGRect( x: toastLabel.frame.minX, y: toastLabel.frame.minY,width: toastLabel.frame.width + 20, height: toastLabel.frame.height + 8)
self.view.addSubview(toastLabel)
UIView.animate(withDuration: 4.0, delay: 0.1, options: .curveEaseOut, animations: {
toastLabel.alpha = 0.0
}, completion: {(isCompleted) in
toastLabel.removeFromSuperview()
})
}
您可以创建自己的烤面包风格，并将其与整个屏幕的中心对齐，如下所示：
func showToast(message: String, in viewController: UIViewController) {
let toastContainer: UIView = {
let view = UIView(frame: CGRect())
view.translatesAutoresizingMaskIntoConstraints = false
view.backgroundColor = UIColor.gray
view.alpha = 0.0
view.layer.cornerRadius = 12
view.clipsToBounds = true
return view
}()
let toastLabel: UILabel = {
let label = UILabel()
label.translatesAutoresizingMaskIntoConstraints = false
label.text = message
label.textColor = UIColor.white
label.textAlignment = .center
label.font = label.font.withSize(20)
label.clipsToBounds = true
label.numberOfLines = 0
return label
}()
toastContainer.addSubview(toastLabel)
viewController.view.addSubview(toastContainer)
toastContainer.layer.zPosition = 1
NSLayoutConstraint.activate([
toastContainer.widthAnchor.constraint(equalToConstant: viewController.view.frame.width * 0.6),
toastContainer.heightAnchor.constraint(equalToConstant: viewController.view.frame.height * 0.1),
toastContainer.centerXAnchor.constraint(equalTo: viewController.view.centerXAnchor),
toastContainer.bottomAnchor.constraint(equalTo: viewController.view.bottomAnchor, constant:
-UIScreen.main.bounds.maxY / 2 + viewController.view.frame.height * 0.1 / 2
),
toastLabel.centerXAnchor.constraint(equalTo: toastContainer.centerXAnchor),
toastLabel.centerYAnchor.constraint(equalTo: toastContainer.centerYAnchor)
])
UIView.animate(withDuration: 0.5, delay: 0.0, options: .curveEaseIn, animations: {
toastContainer.alpha = 1.0
}) { (_) in
UIView.animate(withDuration: 0.5, delay: 2, options: .curveEaseOut, animations: {
toastContainer.alpha = 0.0
}) { (_) in
toastContainer.removeFromSuperview()
}
}
}
Swift 4.2非常简单又超级
let toastLabel = UILabel()
toastLabel.lineBreakMode = .byWordWrapping
toastLabel.numberOfLines = 0
toastLabel.text = "Type your message you want to show in toast"
toastLabel.sizeToFit()
//MARK Resize the Label Frame
toastLabel.frame = CGRect(x: toastLabel.frame.origin.x, y: toastLabel.frame.origin.y, width: toastLabel.frame.size.width + 40, height: toastLabel.frame.size.height + 40)
self.view.addSubview(toastLabel)