iOS 中的 Android Toast 等价物

Question

有谁知道这个 iOS 目标 C 事件的 Java Toast 等效项在片段中是什么？ 以下是我在 iOS 中编写的示例。我正在使用 Toast 代替 iOS UIAlert 在 Java 中寻找相同的警报。如果我没有在我的原始帖子中说明这一点，我很抱歉。

- (void) dateLogic {
    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
    [dateFormat setDateFormat:@"MMMM dd"];
    NSString *theDate = [dateFormat stringFromDate:[NSDate date]];

    //JANUARY
    if ([theDate isEqualToString:@"January 01"]) {

        feastDay = [[UIAlertView alloc]
                     initWithTitle:@"New Years Day!"
                     message:@"January 01"
                     delegate:self
                     cancelButtonTitle:nil
                     otherButtonTitles:@"Close", nil];
        feastDay.delegate = self;
        [feastDay show];
    }
}

Answer 1

我在 github 中发现了这个神奇的类，它的作用就像一个魅力。 Toast for iOS 导入 UIView+Toast.h 和 UIView+Toast.m 文件即可，然后添加

[self.view makeToast:@"This is a piece of toast."];

如页面示例中所写。

Answer 2

我通过一个简单的静态 UI Helper 方法使用 Key Window 来处理它：

+(void)displayToastWithMessage:(NSString *)toastMessage
{
    [[NSOperationQueue mainQueue] addOperationWithBlock:^ {
        UIWindow * keyWindow = [[UIApplication sharedApplication] keyWindow];
        UILabel *toastView = [[UILabel alloc] init];
        toastView.text = toastMessage;
        toastView.font = [MYUIStyles getToastHeaderFont];
        toastView.textColor = [MYUIStyles getToastTextColor];
        toastView.backgroundColor = [[MYUIStyles getToastBackgroundColor] colorWithAlphaComponent:0.9];
        toastView.textAlignment = NSTextAlignmentCenter;
        toastView.frame = CGRectMake(0.0, 0.0, keyWindow.frame.size.width/2.0, 100.0);
        toastView.layer.cornerRadius = 10;
        toastView.layer.masksToBounds = YES;
        toastView.center = keyWindow.center;

        [keyWindow addSubview:toastView];

        [UIView animateWithDuration: 3.0f
                          delay: 0.0
                        options: UIViewAnimationOptionCurveEaseOut
                     animations: ^{
                         toastView.alpha = 0.0;
                     }
                     completion: ^(BOOL finished) {
                         [toastView removeFromSuperview];
                     }
         ];
    }];
}

Answer 3

iOS 中没有 android toast 等价物。

但总有一些解决方法，比如

您可以为视图设置动画并使用它的 alpha

以下只是示例代码，不是解决方案

UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:3.0f];
imageView.alpha = 0.0f;
[UIView commitAnimations];

如果不想在3秒内慢慢淡出，可以使用

[UIView setAnimationDelay:3];

并将动画持续时间减少到 0.5f 或其他东西。我认为使用较短的淡出时间感觉比简单地将隐藏设置为 YES 更好

Answer 4

我们已经在我们的开源库Raisin Toast 中实现了类似的功能。将文件添加到项目后，设置非常简单：

向您的应用委托添加属性：

@property (strong, nonatomic) RZMessagingWindow *errorWindow;

创建默认消息窗口：

self.errorWindow = [RZMessagingWindow defaultMessagingWindow];
[RZErrorMessenger setDefaultMessagingWindow:self.errorWindow];

然后一行显示消息窗口：

[RZErrorMessenger displayErrorWithTitle:@"Whoops!" detail:@"Something went horribly wrong and we accidentally cut off the wrong leg"];

演示项目重点介绍了添加图像和自定义样式的一些更高级的自定义。

该实现使用第二个 UIWindow，并且由于 RZErrorMessenger 类方法，它随处可用。

Answer 5

也许这可以帮助某人：

NSString *message = @"Toast kind of message";
UIAlertView *toast = [[UIAlertView alloc] initWithTitle:nil
                                            message:message
                                           delegate:nil
                                  cancelButtonTitle:nil
                                  otherButtonTitles:nil, nil];
[toast show];
int duration = 1; // in seconds

dispatch_after(dispatch_time(DISPATCH_TIME_NOW, duration * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
[toast dismissWithClickedButtonIndex:0 animated:YES];
});

更新 UIAlertView 在 IOS 8 中已弃用。这里是新方法：

NSString *message = @"Toast kind of message";

UIAlertController *toast =[UIAlertController alertControllerWithTitle:nil
 message:message 
 preferredStyle:UIAlertControllerStyleAlert];
[self presentViewController:toast animated:YES completion:nil];

int duration = 1; // in seconds

dispatch_after(dispatch_time(DISPATCH_TIME_NOW, duration * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
    [toast dismissViewControllerAnimated:YES completion:nil];
});

编辑： 对于使用 Xamarin.IOS 的用户，您可以这样做：

new UIAlertView(null, message, null, "OK", null).Show();

使用 UIKit；是必需的。

Answer 6

准备好复制粘贴的 Swift 3 解决方案：

import UIKit

public extension UIView {

    public func showToast(message:String, duration:Int = 2000) {

        let toastLabel = UIPaddingLabel();
        toastLabel.padding = 10;
        toastLabel.translatesAutoresizingMaskIntoConstraints = false;
        toastLabel.backgroundColor = UIColor.darkGray;
        toastLabel.textColor = UIColor.white;
        toastLabel.textAlignment = .center;
        toastLabel.text = message;
        toastLabel.numberOfLines = 0;
        toastLabel.alpha = 0.9;
        toastLabel.layer.cornerRadius = 20;
        toastLabel.clipsToBounds = true;

        self.addSubview(toastLabel);

        self.addConstraint(NSLayoutConstraint(item:toastLabel, attribute:.left, relatedBy:.greaterThanOrEqual, toItem:self, attribute:.left, multiplier:1, constant:20));
        self.addConstraint(NSLayoutConstraint(item:toastLabel, attribute:.right, relatedBy:.lessThanOrEqual, toItem:self, attribute:.right, multiplier:1, constant:-20));
        self.addConstraint(NSLayoutConstraint(item:toastLabel, attribute:.bottom, relatedBy:.equal, toItem:self, attribute:.bottom, multiplier:1, constant:-20));
        self.addConstraint(NSLayoutConstraint(item:toastLabel, attribute:.centerX, relatedBy:.equal, toItem:self, attribute:.centerX, multiplier:1, constant:0));

        UIView.animate(withDuration:0.5, delay:Double(duration) / 1000.0, options:[], animations: {

            toastLabel.alpha = 0.0;

        }) { (Bool) in

            toastLabel.removeFromSuperview();
        }
    }
}

UIPaddingLabel 类：

import UIKit

@IBDesignable class UIPaddingLabel: UILabel {

    private var _padding:CGFloat = 0.0;

    public var padding:CGFloat {

        get { return _padding; }
        set {
            _padding = newValue;

            paddingTop = _padding;
            paddingLeft = _padding;
            paddingBottom = _padding;
            paddingRight = _padding;
        }
    }

    @IBInspectable var paddingTop:CGFloat = 0.0;
    @IBInspectable var paddingLeft:CGFloat = 0.0;
    @IBInspectable var paddingBottom:CGFloat = 0.0;
    @IBInspectable var paddingRight:CGFloat = 0.0;

    override func drawText(in rect: CGRect) {
        let insets = UIEdgeInsets(top:paddingTop, left:paddingLeft, bottom:paddingBottom, right:paddingRight);
        super.drawText(in: UIEdgeInsetsInsetRect(rect, insets));
    }

    override var intrinsicContentSize: CGSize {

        get {
            var intrinsicSuperViewContentSize = super.intrinsicContentSize;
            intrinsicSuperViewContentSize.height += paddingTop + paddingBottom;
            intrinsicSuperViewContentSize.width += paddingLeft + paddingRight;
            return intrinsicSuperViewContentSize;
        }
    }
}

Answer 7

斯威夫特 2.0：

使用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 8

如果你真的只想要 android toast 的外观，那么试试这个库，它运行良好，在我的几个应用中使用过

https://github.com/ecstasy2/toast-notifications-ios 运行良好...

Answer 9

目标 C

+(void)showPositiveMessage :(NSString*)message{
[ViewController showAlertWithBackgroundColor:[UIColor greenColor] textColor:[UIColor whiteColor] message:message];}

+(void)showNegativeMessage :(NSString*)message{
    [ViewController showAlertWithBackgroundColor:[UIColor redColor] textColor:[UIColor whiteColor] message:message];}

+(void)showAlertWithBackgroundColor:(UIColor*)backgroundColor textColor:(UIColor*)textColor message:(NSString*)String{
    AppDelegate* appDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;

    UILabel* label = [[UILabel alloc] initWithFrame:CGRectZero];
    label.textAlignment = NSTextAlignmentCenter;
    label.text = String;
    label.font = [UIFont fontWithName:@"HelveticaNeue" size:FONTSIZE];
    label.adjustsFontSizeToFitWidth = true;
    [label sizeToFit];
    label.numberOfLines = 4;
    label.layer.shadowColor = [UIColor grayColor].CGColor;
    label.layer.shadowOffset = CGSizeMake(4, 3);
    label.layer.shadowOpacity = 0.3;
    label.frame = CGRectMake(320, 64, appDelegate.window.frame.size.width, 44);
    label.alpha = 1;        
    label.backgroundColor = backgroundColor;
    label.textColor = textColor;

    [appDelegate.window addSubview:label];

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


    [UIView animateWithDuration:2.0 delay:0.0 usingSpringWithDamping:0.5 initialSpringVelocity:0.1 options:UIViewAnimationOptionCurveEaseOut animations: ^(void){
        label.frame = basketTopFrame;
    } completion:^(BOOL finished){
        [label removeFromSuperview];
    }
    ];}

斯威夫特

How to Toast message in Swift?

Answer 10

我知道这个问题已经很老了，但我发现自己在这里想知道同样的事情，我找到了解决方案，所以我想我会分享。此方法允许在您设置的时间延迟后解除警报。

let alertController = UIAlertController(title: "Error", message: "There was a problem logging in, please try again", preferredStyle: UIAlertControllerStyle.alert)
self.present(alertController, animated: true, completion: nil)
let delay = DispatchTime.now() + 1 // change 1 to desired number of seconds
DispatchQueue.main.asyncAfter(deadline: delay) {
  // Your code with delay
  alertController.dismiss(animated: true, completion: nil)
}

如果您收到导致应用程序崩溃的错误，可能是因为 alertConroller 正在后台线程上运行。要解决这个问题，请将您的代码包装在：

DispatchQueue.main.async(execute: {

});

当用户单击消息下方的“确定”按钮时，此方法允许关闭消息

let alertController = UIAlertController(title: "Error", message: "There was a problem logging in, please try again", preferredStyle: UIAlertControllerStyle.alert)
let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default) { (result : UIAlertAction) -> Void in
                    print("OK")
                }
alertController.addAction(okAction)
self.present(alertController, animated: true, completion: nil)

Answer 11

Daniele D 有一个优雅的解决方案，但 UIAlertView 已被弃用。改用 UIAlertController：

    NSString *message = @"Toast message.";

    UIAlertController *toast =[UIAlertController alertControllerWithTitle:nil message:message preferredStyle:UIAlertControllerStyleAlert];
    [self presentViewController:toast animated:YES completion:nil];

    int duration = 2; // in seconds

    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, duration * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
        [toast dismissViewControllerAnimated:YES completion:nil];
    });

Answer 12

我决定推出一个更完整的 Xamarin.iOS / MonoTouch 解决方案，它对我来说非常有用。

    private async Task ShowToast(string message, UIAlertView toast = null)
    {
        if (null == toast)
        {
            toast = new UIAlertView(null, message, null, null, null);
            toast.Show();
            await Task.Delay(2000);
            await ShowToast(message, toast);
            return;
        }

        UIView.BeginAnimations("");
        toast.Alpha = 0;
        UIView.CommitAnimations();
        toast.DismissWithClickedButtonIndex(0, true);
    }

更新 UIAlertView 在 IOS 8 中已弃用。这里是新方法：

var toast = UIAlertController.Create("", message, UIAlertControllerStyle.Alert);
        UIApplication.SharedApplication.KeyWindow.RootViewController.PresentViewController(toast, true, async () =>
        {
            await Task.Delay(2000);
            UIView.BeginAnimations("");
            toast.View.Alpha = 0;
            UIView.CommitAnimations();
            toast.DismissViewController(true, null);
        });

如果您希望吐司位于屏幕底部而不是中间，请使用

UIAlertControllerStyle.ActionSheet

如果该方法是从后台线程（不是主 UI 线程）调用的，则需要 BeginInvokeOnMainThread，这意味着只需像这样调用它。

BeginInvokeOnMainThread(() =>
{
 ShowToast(message);
});

Answer 13

这个也很方便，因为它也有一个完成块，请看看:) https://github.com/PrajeetShrestha/EkToast

Answer 14

另一个快速简单的 toast 实现。 单个文件，复制粘贴到您的应用中：

https://github.com/gglresearchanddevelopment/ios-toast

Answer 15

我编写了最简单的代码，它对我来说总是完美无缺。

在 Appdelegate.h 中添加这一行

-(void) showToastMessage:(NSString *) 消息；

在 Appdelegate.m 中添加以下代码

-(void) showToastMessage:(NSString *) message
{

    //if there is already a toast message on the screen so that donot show and return from here only
    if ([self.window.rootViewController.view viewWithTag:100])
    {
        return;
    }

    UILabel *lblMessage = [[UILabel alloc]init];
    lblMessage.tag = 100;
    lblMessage.textAlignment = NSTextAlignmentCenter;
    lblMessage.text = message;
    lblMessage.font = [UIFont systemFontOfSize:12.0];
    lblMessage.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.5f];
    lblMessage.textColor = [UIColor whiteColor];

    CGSize textSize = [[lblMessage text] sizeWithAttributes:@{NSFontAttributeName:[lblMessage font]}];

    float x = self.window.rootViewController.view.center.x - textSize.width/2;
    float labelWidth = MIN(textSize.width, SCREEN_WIDTH - 40);

    lblMessage.frame = CGRectMake(x, SCREEN_HEIGHT - 90.f, labelWidth + 50, textSize.height + 20);
    CGRect oldFrame = lblMessage.frame;

    //comment this line if u don't want to show the toost message below in the screen
    lblMessage.center = self.window.rootViewController.view.center;
    x = lblMessage.frame.origin.x;
    lblMessage.frame = CGRectMake(x, oldFrame.origin.y, oldFrame.size.width, oldFrame.size.height);

    //and add this line if you want to show the message in the centre of the screen
    //lblMessage.center = self.window.rootViewController.view.center;

    lblMessage.layer.cornerRadius = lblMessage.frame.size.height/2;
    lblMessage.layer.masksToBounds = true;

    [self.window.rootViewController.view addSubview:lblMessage];
    [self performSelector:@selector(removeToastMessage:) withObject:lblMessage afterDelay:2.0f];

}


-(void) removeToastMessage: (UILabel *)label
{
    [UIView animateWithDuration:1.0f animations:^{
        label.alpha = 0.f;
    }];

    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0f * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [label removeFromSuperview];

    });
}

现在在您想要使用的任何 ViewController 中，只需导入 #import "AppDelegate.h" 并使用以下代码。

用于显示 toast 消息

AppDelegate *appDel = (AppDelegate *) [[UIApplication sharedApplication] delegate];
                     NSString *strMessage = @"show my alert";
                     [appDel showToastMessage:strMessage];

Answer 16

斯威夫特 4+

除非您正在寻找某种 UIAlertController 不会提供给您的额外功能，否则您无需下载任何内容。

let alertbox = UIAlertController(title: "Error", message: "You did not enter an email address", preferredStyle: UIAlertController.Style.alert)
        let okAction = UIAlertAction(title: "OK", style: UIAlertAction.Style.default) { (result : UIAlertAction) -> Void in
            print("OK")
        }
        alertbox.addAction(okAction)
        self.present(alertbox, animated: true, completion: nil)

上面的代码显示了一个标题为“错误”的警报对话框、描述消息和一个确定按钮，以便用户可以关闭警报。

Answer 17

这是文档： https://developer.apple.com/documentation/uikit/uialertcontroller

这是一个实现类的例子：

class AlertMode: NSObject {

  func alertWithOneAction(title: String, message: String, actionTitle: String, handler: @escaping ((UIAlertAction) -> Void), `on` controller: UIViewController ) -> () {
    let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.alert)
    alert.addAction(UIAlertAction(title: actionTitle, style: UIAlertActionStyle.default, handler: handler))
    controller.present(alert, animated: true, completion: nil)
 }
}

Answer 18

对于 Swift UI，我使用这个开源代码：https://github.com/huynguyencong/ToastSwiftUI。它易于使用。

struct ContentView: View {
    @State private var isShowingToast = false
    
    var body: some View {
        VStack(spacing: 20) {
            Button("Show toast") {
                self.isShowingToast = true
            }
            
            Spacer()
        }
        .padding()

        // Just add a modifier to show a toast, with binding variable to control
        .toast(isPresenting: $isShowingToast, dismissType: .after(3)) {
            ToastView(message: "Hello world!", icon: .info)
        }
    }
}

Answer 19

你可以使用，我一直都在使用，这在目标 c 中效果很好。

+(void)showToastOnView:(UIView * _Nonnull)view withString:(NSString * _Nonnull)text forDuration:(AVToastDurationStatus)duration;

此处提供：

AviToast Github.