天道酬勤,学无止境

loading

UISearchController with loading indicator

问题 回答1 extension UISearchBar { var textField: UITextField? { if #available(iOS 13.0, *) { return searchTextField } else { if let textField = value(forKey: "searchField") as? UITextField { return textField } return nil } } private var activityIndicator: UIActivityIndicatorView? { return textField?.leftView?.subviews.compactMap{ $0 as? UIActivityIndicatorView }.first } var isLoading: Bool { get { return activityIndicator != nil } set { if newValue { if activityIndicator == nil { let newActivityIndicator = UIActivityIndicatorView(style: .gray) newActivityIndicator.startAnimating() if #available

2022-05-14 09:34:04    分类:技术分享    ios   objective-c   loading   uisearchcontroller

Swift - Lazy loading a property that can be made nil later

问题 我正在寻找一种方法来延迟加载我的变量,但我希望能够稍后将其设为 nil,然后在获取时重新创建它。 例如,在出现内存警告的情况下,我想清除任何未使用的内容,然后在以后需要时重新创建它。 以下是我在 Objective-C 中的做法以及我目前对 swift 的解释。 我不确定它是否保留了保持当前导航的变量。 Obj-C 实现 @property (strong, nonatomic, readwrite) UINavigationController *navController; ... - (UINavigationController *)navController { if (!_navController) { UIStoryboard *tempStoryboard = [UIStoryboard storyboardWithName:@"SomeStoryboard" bundle:nil]; _navController = [tempStoryboard instantiateInitialViewController]; } return _navController; } ... - (void)didReceiveMemoryWarning { if (![self.centerView isEqual:_navController]) {

2022-05-09 04:39:21    分类:技术分享    properties   swift   loading   lazy-evaluation

C# - Display loading 1-100% within 4 seconds

问题 回答1 在窗体上放置一个 Timer 控件,并将其 Interval 属性设置为 40,并将其 Enabled 属性设置为 true。 像这样创建一个表单级变量: private int _Progress = 0; 在 Timer's Tick 事件中,输入以下代码: if (_Progress < 100) { _Progress++; label1.Text = _Progress.ToString() + "%"; } else { timer1.Enabled = false; } 计时器并不是真正精确到毫秒,所以这不会花费 4 秒,但它会完成这项工作。 回答2 if(progress < 100) { progress++; progessLabel.Text = String.Format("Loading... Progress: {0}%", progress); } else { timer.Enabled = false; } 回答3 间隔设置为 100 毫秒的计时器将是最简单的方法。 记下计时器事件被调用的次数,并以 2.5% 的速度更新进度条。 虽然这可行,但我想说进度条不适合这种情况。 相反,只是一个动画图形会更好,因为它表明您的程序正在启动,但不会像进度条那样误导。 我认为微软经常犯这个错误,在某些应用程序中使用误导性的进度条。

2022-05-05 11:51:28    分类:技术分享    c#   label   loading   splash-screen

How to make a loading animation in Console Application written in C++?

I am coding a Console Application in c++ and I need to make something like a "loading.gif" just by using ASCII characters. The following is the list of the characters that I should be using: -- \ | / -- These symbols will make a loading animation by cycling. However, when I write the output, it become like: Output line 1: -- Output line 2: \ Output line 3: | Output line 4: / Output line 5: -- I need to do this like this: Output line 1: [this will be replaced all the time] It should never go to the second line. How can I do this in C++? Is there any kind of replace function?

2022-05-01 00:48:29    分类:问答    c++   animation   console   replace   loading

How to show Loading Indicator in WebView Flutter?

I want to show Loading first before the web view data displayed on the screen. How can do that? This is my code: class WebDetailPage extends StatelessWidget { final String title; final String webUrl; final Completer<WebViewController> _controller = Completer<WebViewController>(); WebDetailPage({ @required this.title, @required this.webUrl, }); @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( backgroundColor: Colour.white, title: Text(title, style: TextStyle(color: Colour.midnightBlue)), leading: IconButton( icon: Icon(Icons.arrow_back, color: Colour.midnightBlue)

2022-04-29 17:15:46    分类:问答    flutter   webview   loading

UISearchController with loading indicator

I implemented UISearchController and I'm getting the data from a js callback but when I tape in the searchbar it takes some time to put the data so I wanted to know how to implement a loading indicator into the table view result of UISearchController

2022-04-29 06:00:00    分类:问答    ios   objective-c   loading   uisearchcontroller

UIActivityIndicatorView not showing until after loading done

问题 我在当前导航到 viewcontroller 上有一个按钮,连接到 IBAction。 在 IBAction 中,我像往常一样使用 [self.view addSubView] 创建一个 UIActivityIndi​​catorView,然后加载一些图片。 我已经在指示器视图、视图控制器和窗口上尝试了 setNeedsDisplay,但它仍然在显示指示器之前加载图片,这对我来说当然没什么用。 所以我正在寻找一种方法来强制即时重绘(当我想更多一点时它不太可能起作用),或者在指标出现后加载图片的方法,或者启动一个方法单独的线程或类似的开始动画/显示指示器,或将指示器放在单独的视图控制器中,并以某种方式强制它在继续图片加载之前添加/显示自身。 建议? 回答1 在这种情况下我要做的是生成一个新线程,它可以释放主线程来处理 UI 交互,同时在后台加载内容。 首先显示UIActivityIndicatorView ,然后生成一个加载图像的新线程,然后在新线程中执行的方法的最后一行,隐藏UIActivityIndicatorView 。 这是一个例子: //do stuff... [activityIndicatorView startAnimating]; [NSThread detachNewThreadSelector:@selector(loadImages) toTarget

2022-04-28 22:09:03    分类:技术分享    ios   objective-c   cocoa-touch   loading   uiactivityindicatorview

CSS cannot be loaded from `file:` URLs unless they end in a `.css` file extension

i'm trying for the first time to use sass and not css but when i try to load the stylesheet the browser tell me that it can only load .css as stylesheet. Here is the html <!DOCTYPE html> <html lang="en" dir="ltr"> <head> <meta charset="utf-8"> <link rel="stylesheet" href="./index_style.scss"> </head> <body> </body> </html> And the error [Deprecation] CSS cannot be loaded from `file:` URLs unless they end in a `.css` file extension. i'm using chrome

2022-04-28 10:22:51    分类:问答    css   sass   loading

Swift - Lazy loading a property that can be made nil later

I am looking for a way to lazy load my variable, but I want to be able to make it nil later and then recreate it on the get. For example in the instance that there is a memory warning i want to clear anything that isn't used and then recreate it when needed again later. Here is how I would do it in Objective-C and my current interpretation in swift. I am not sure that it preserves the variable for keeping current navigation. Obj-C Implementation @property (strong, nonatomic, readwrite) UINavigationController *navController; ... - (UINavigationController *)navController { if (!_navController) {

2022-04-27 02:50:07    分类:问答    properties   swift   loading   lazy-evaluation

C# - Display loading 1-100% within 4 seconds

I have a label on a splash screen that is displayed for 4 seconds. I am trying to make the label display the loading process as a percentage. Obviously, this is just to show the user that the program is actually starting up and not actually "loading" anything. Is there a way that I can have the label display the percentage (going from 1% to 100%) within 4 seconds? A bit lost on how to do this.

2022-04-26 08:15:01    分类:问答    c#   label   loading   splash-screen