iOS 应用程序的 android.widget.Toast 等价物是什么？
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What is the android.widget.Toast equivalent for iOS applications?
提问by mooongcle
I have made Android application a few months ago. The Toast class is very useful for me. I do not need to consider the main Thread and place to show it. Anywhere I can show it and just leave that and it is automatically disappeared.
几个月前我制作了 Android 应用程序。Toast 类对我非常有用。我不需要考虑主线程和显示它的地方。任何我可以显示它的地方，只要离开它，它就会自动消失。
Toast.makeToast(context, msg, Toast.LENGTH_SHORT).show();
That's it. ^^
就是这样。^^
What about iPhone? Is there something like the Toast? Just show message and do not need to care about it. It will be automatically disappeared.
iPhone呢？有没有像吐司一样的东西？只显示消息，不需要关心它。它会自动消失。
采纳答案by Quentin
There is no class "out-of-the-box" in UIKit to do this. But it is quite easy to create a class that will offer this behavior.
UIKit 中没有“开箱即用”的类来执行此操作。但是创建一个提供这种行为的类是很容易的。
You just have to create a class that inherit from UIView. This class will have the responsibility - to create what you want to display, - to add itself in parent view hierarchy - to dismiss itself using a timer.
你只需要创建一个继承自 UIView 的类。此类将负责 - 创建您想要显示的内容， - 将自身添加到父视图层次结构中 - 使用计时器关闭自身。
You will be able to use it like :
您将能够像这样使用它：
[ToastView toastViewInView:myParentView withText:@"what a wonderful text"];
Regards, Quentin
问候，昆汀
回答by SSemashko
I've been writing for Android for a long time and I am missing Toast. I've implemented one. Need code? here you are:
我已经为 Android 编写了很长时间，但我很想念 Toast。我已经实现了一个。需要代码吗？这个给你：
ToastView.h
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
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
Call from ViewController
从 ViewController 调用
[ToastView showToastInParentView:self.view withText:@"What a toast!" withDuaration:5.0];
回答by kitimenpolku
Have not tried but you might want to check:
没试过，但你可能想检查：
https://github.com/ecstasy2/toast-notifications-ios
https://github.com/ecstasy2/toast-notifications-ios
回答by petrsyn
Edit: Updated for Swift 3
编辑：针对 Swift 3 更新
Here is a Swift 3 version based on wojciech_maciejewski's answer. This looks more like Android Toast and doesn't stack toasts on each other. It draws toast into the center of the screen. It can handle long multiline texts.
这是基于 wojciech_maciejewski 的答案的 Swift 3 版本。这看起来更像 Android Toast 并且不会相互堆叠 Toast。它将吐司绘制到屏幕中央。它可以处理长的多行文本。
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() })
}
}
Usage from another controller:
另一个控制器的用法：
ToastView.showInParent(navigationController!.view, "Hello world")
回答by Mahesh Giri
You can do this in many ways one of the way is using UIAlertViewController()in swift3
您可以通过多种方式执行此操作，其中一种方式是UIAlertViewController()在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)
})
回答by wojciech_maciejewski
I'm posting swift version of Scarmysun answer:) many thanks
我正在发布快速版的 Scarmysun 答案:) 非常感谢
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() })
}
}
