Quel est l'équivalent pour les applications iOS android.widget.Toast?

Question

J'ai fait application Android il y a quelques mois. La classe Toast est très utile pour moi. Je ne ai pas besoin de considérer le thread principal et le lieu de le montrer. Partout je peux le montrer et laisser tout cela et il est automatiquement disparu.

Toast.makeToast(context, msg, Toast.LENGTH_SHORT).show();

Voilà. ^^

Qu'en est-il pour l'iPhone? Y at-il quelque chose comme le Toast? Il suffit de montrer un message et ne pas besoin de se soucier de lui. Il sera automatiquement disparu.

Answer 1

Il n'y a pas de classe "out-of-the-box" UIKit pour ce faire. Mais il est de créer assez facile une classe qui offrira ce comportement.

Il vous suffit de créer une classe héritant de UIView. Cette classe aura la responsabilité  - pour créer ce que vous voulez afficher,  - s'ajouter dans la hiérarchie de vue parent  -. À se rejeter à l'aide d'une minuterie

Vous pourrez l'utiliser comme:

[ToastView toastViewInView:myParentView withText:@"what a wonderful text"];

Cordialement, Quentin

Answer 2

J'ai écrit pour Android depuis longtemps et je suis absent Toast. J'ai mis un. Code Besoin? vous êtes ici:

ToastView.h

#import <UIKit/UIKit.h>

@interface ToastView : UIView

@property (strong, nonatomic) NSString *text;

+ (void)showToastInParentView: (UIView *)parentView withText:(NSString *)text withDuaration:(float)duration;

@end

ToastView.m

#import "ToastView.h"

@interface ToastView ()
@property (strong, nonatomic, readonly) UILabel *textLabel;
@end
@implementation ToastView
@synthesize textLabel = _textLabel;

float const ToastHeight = 50.0f;
float const ToastGap = 10.0f;

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}

-(UILabel *)textLabel
{
    if (!_textLabel) {
        _textLabel = [[UILabel alloc] initWithFrame:CGRectMake(5.0, 5.0, self.frame.size.width - 10.0, self.frame.size.height - 10.0)];
        _textLabel.backgroundColor = [UIColor clearColor];
        _textLabel.textAlignment = NSTextAlignmentCenter;
        _textLabel.textColor = [UIColor whiteColor];
        _textLabel.numberOfLines = 2;
        _textLabel.font = [UIFont systemFontOfSize:13.0];
        _textLabel.lineBreakMode = NSLineBreakByCharWrapping;
        [self addSubview:_textLabel];

    }
    return _textLabel;
}

- (void)setText:(NSString *)text
{
    _text = text;
    self.textLabel.text = text;
}

+ (void)showToastInParentView: (UIView *)parentView withText:(NSString *)text withDuaration:(float)duration;
{

    //Count toast views are already showing on parent. Made to show several toasts one above another
    int toastsAlreadyInParent = 0;
    for (UIView *subView in [parentView subviews]) {
        if ([subView isKindOfClass:[ToastView class]])
        {
            toastsAlreadyInParent++;
        }
    }

    CGRect parentFrame = parentView.frame;

    float yOrigin = parentFrame.size.height - (70.0 + ToastHeight * toastsAlreadyInParent + ToastGap * toastsAlreadyInParent);

    CGRect selfFrame = CGRectMake(parentFrame.origin.x + 20.0, yOrigin, parentFrame.size.width - 40.0, ToastHeight);
    ToastView *toast = [[ToastView alloc] initWithFrame:selfFrame];

    toast.backgroundColor = [UIColor darkGrayColor];
    toast.alpha = 0.0f;
    toast.layer.cornerRadius = 4.0;
    toast.text = text;

    [parentView addSubview:toast];

    [UIView animateWithDuration:0.4 animations:^{
        toast.alpha = 0.9f;
        toast.textLabel.alpha = 0.9f;
    }completion:^(BOOL finished) {
        if(finished){

        }
    }];


    [toast performSelector:@selector(hideSelf) withObject:nil afterDelay:duration];

}

- (void)hideSelf
{

    [UIView animateWithDuration:0.4 animations:^{
        self.alpha = 0.0;
        self.textLabel.alpha = 0.0;
    }completion:^(BOOL finished) {
        if(finished){
            [self removeFromSuperview];
        }
    }];
}

@end

Appel de ViewController

 [ToastView showToastInParentView:self.view withText:@"What a toast!" withDuaration:5.0];

Answer 3

N'a pas essayé, mais vous pouvez vérifier:

https://github.com/ecstasy2/toast-notifications-ios

https://github.com/scalessec/Toast

Answer 4

Edit: Mise à jour pour Swift 3

Voici une version rapide de 3 basée sur la réponse de wojciech_maciejewski. Cela ressemble plus à Android Toast et ne pas empiler des toasts sur l'autre. Il tire du pain grillé dans le centre de l'écran. Il peut traiter des textes longs multilignes.

import UIKit

class ToastView: UIView {

    private static let hLabelGap: CGFloat = 40.0
    private static let vLabelGap: CGFloat = 20.0
    private static let hToastGap: CGFloat = 20.0
    private static let vToastGap: CGFloat = 10.0

    private var textLabel: UILabel!

    static func showInParent(_ parentView: UIView, _ text: String, duration: Double = 3.0) {
        let labelFrame = CGRect(x: parentView.frame.origin.x + hLabelGap,
                                y: parentView.frame.origin.y + vLabelGap,
                                width: parentView.frame.width - 2 * hLabelGap,
                                height: parentView.frame.height - 2 * vLabelGap)
        let label = UILabel()
        label.font = UIFont.systemFont(ofSize: 15.0)
        label.text = text
        label.backgroundColor = UIColor.clear
        label.textAlignment = NSTextAlignment.center
        label.textColor = UIColor.white
        label.numberOfLines = 0
        label.frame = labelFrame
        label.sizeToFit()

        let toast = ToastView()
        toast.textLabel = label
        toast.addSubview(label)
        toast.frame = CGRect(x: label.frame.origin.x - hToastGap,
                             y: label.frame.origin.y - vToastGap,
                             width: label.frame.width + 2 * hToastGap,
                             height: label.frame.height + 2 * vToastGap)
        toast.backgroundColor = UIColor.darkGray
        toast.alpha = 0.0
        toast.layer.cornerRadius = 20.0
        toast.center = parentView.center
        label.center = CGPoint(x: toast.frame.size.width / 2, y: toast.frame.size.height / 2)

        parentView.addSubview(toast)

        UIView.animate(withDuration: 0.4, animations: {
            toast.alpha = 0.9
            label.alpha = 0.9
        })

        toast.perform(#selector(hideSelf), with: nil, afterDelay: duration)
    }

    @objc private func hideSelf() {
        UIView.animate(withDuration: 0.4, animations: {
            self.alpha = 0.0
            self.textLabel.alpha = 0.0
            }, completion: { t in self.removeFromSuperview() })
    }
}

Utilisation d'un autre contrôleur:

ToastView.showInParent(navigationController!.view, "Hello world")

Answer 5

Je souhaite publier la version rapide de réponse Scarmysun :) merci beaucoup

import Foundation
import UIKit

class ToastView: UIView {
    static let toastHeight:CGFloat = 50.0
    static let toastGap:CGFloat = 10;
    lazy var textLabel: UILabel = UILabel(frame: CGRectMake(5.0, 5.0, self.frame.size.width - 10.0, self.frame.size.height - 10.0))


    static func showInParent(parentView: UIView!, withText text: String, forDuration duration: double_t) {

        //Count toast views are already showing on parent. Made to show several toasts one above another
        var toastsAlreadyInParent = 0;

        for view in parentView.subviews {
            if (view.isKindOfClass(ToastView)) {
                toastsAlreadyInParent++
            }
        }

        var parentFrame = parentView.frame;

        var yOrigin = parentFrame.size.height - getDouble(toastsAlreadyInParent)

        var selfFrame = CGRectMake(parentFrame.origin.x + 20.0, yOrigin, parentFrame.size.width - 40.0, toastHeight);
        var toast = ToastView(frame: selfFrame)

        toast.textLabel.backgroundColor = UIColor.clearColor()
        toast.textLabel.textAlignment = NSTextAlignment.Center
        toast.textLabel.textColor = UIColor.whiteColor()
        toast.textLabel.numberOfLines = 2
        toast.textLabel.font = UIFont.systemFontOfSize(13.0)
        toast.addSubview(toast.textLabel)

        toast.backgroundColor = UIColor.darkGrayColor()
        toast.alpha = 0.0;
        toast.layer.cornerRadius = 4.0;
        toast.textLabel.text = text;

        parentView.addSubview(toast)
        UIView.animateWithDuration(0.4, animations: {
            toast.alpha = 0.9
            toast.textLabel.alpha = 0.9
        })


        toast.performSelector(Selector("hideSelf"), withObject: nil, afterDelay: duration)

    }

    static private func getDouble(toastsAlreadyInParent : Int) -> CGFloat {
        return (70.0 + toastHeight * CGFloat(toastsAlreadyInParent) + toastGap * CGFloat(toastsAlreadyInParent));
    }

     func hideSelf() {
        UIView.animateWithDuration(0.4, animations: {
            self.alpha = 0.0
            self.textLabel.alpha = 0.0
        }, completion: { t in self.removeFromSuperview() })
    }

}

Answer 6

Vous pouvez le faire de plusieurs façons l'un des moyens est d'utiliser UIAlertViewController() dans swift3

let alertManager=UIAlertController(title: nil, message: "Welcome!", preferredStyle: .alert)

self.present(alertManager, animated: true, completion: nil)

DispatchQueue.main.asyncAfter(deadline: DispatchTime.now()+1,
 execute: {
                                    alertManager.dismiss(animated: false, completion: nil)

                                })