selector

respondToSelector / performSelector with parameter from a string in Swift 3

由 ￣綄美尐妖づ 提交于 2020-01-05 03:37:34
问题 I have to call method of a class. This method potentially exists or not. I'm looking for a solution from 2 hours. The following works without parameter sayHello() I have the class : class myClass: NSObject { func say(something:String){ print("I say : \(something)") } func sayHello(){ print("Hello") } } 1st step : Create a selector from a string with a parameter let selector = NSSelectorFromString("sayHello" ) let selectorWithParam = NSSelectorFromString("say:" ) 2nd step : Test if the method

#selector' refers to a method that is not exposed to Objective-C swift 3

由 笑着哭i 提交于 2020-01-04 05:42:09
问题 I'm using Xcode 8 and swift 3. I have the following error on line "let action": #selector' refers to a method that is not exposed to Objective-C Any suggestion ? override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let cell = tableView.dequeueReusableCell(withIdentifier: "cellWaze", for: indexPath) as! WazeTableViewCell // Configure the cell... cell.lbAgence.text = aWAgence[indexPath.row][0] as? String let cellLat :Double = aWAgence

The #selector is not compatible with the closure?

由 不打扰是莪最后的温柔 提交于 2020-01-04 03:01:06
问题 I have tried to implement the custom function with the closure. But it's does not supported by #selector . Here's an example: class Core: NSObject { static let shared:Core = Core.init() func button(viewController: UIViewController, button: UIButton, title: String, color: UIColor, completion: () -> Void) { button.layer.cornerRadius = button.bounds.width / 2 button.setTitle(title, for: .normal) button.setTitleColor(UIColor.white, for: .normal) button.backgroundColor = color button.titleLabel?

Is there any alternative for NSInvocation in Swift?

由 偶尔善良 提交于 2020-01-03 21:12:11
问题 I'm trying to invoke a selector, with multiple (2+) arguments (the number of arguments can be determined). However, the selector is unknown at compile time (generated with NSSelectorFromString, actually). In Objective-C, I could create an invocation and set arguments to it and invoke it. But this is not available in Swift. Is there any way around this? Like: let obj = SomeClass() let selector = NSSelectorFromString("arg1:arg2:arg3:") //selector, arguments known only at runtime //invoke

Find nth element by classname using selenium python

由 为君一笑 提交于 2020-01-03 03:26:06
问题 I just started using selenium yesterday to help scrape some data and I'm having a difficult time wrapping my head around the selector engine. I know lxml, BeautifulSoup, jQuery and Sizzle have similar engines. But what I'm trying to do is: Wait 10 seconds for page to completely load Make sure there are the presence of ten or more span.eN elements (two load on intitial page load and more after) Then start processing the data with beautifulsoup I am struggling with the selenium conditions of

selector as parameter in IOS

由 霸气de小男生 提交于 2020-01-02 01:09:07
问题 I want to raise a different method for each created button. I try to call "FirstImage" method in viewDidLoad but it doesn't work. I have a problem with the selector in ViewDidLoad. Didn't recognise "FirstImage" which is a void method without parameter. ViewController.m - (void)createFirstButton:(NSString *)myName: (SEL *)myAction{ UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [btn addTarget:self action:@selector(myAction) forControlEvents:UIControlEventTouchUpInside];

iPhone - cancelPerformSelectorWithTarget not working

由 六月ゝ 毕业季﹏ 提交于 2020-01-01 14:44:11
问题 If I do this in a subclass of UIView: [self performSelector:@selector(doSomething) withObject:nil afterDelay:5]; Then cancel it like this (I've tried both versions): [[NSRunLoop currentRunLoop] cancelPerformSelectorsWithTarget:self]; //[[NSRunLoop mainRunLoop] cancelPerformSelectorsWithTarget:self]; The "doSomething" method still gets called. What am I doing wrong? 回答1: In the NSObject class reference: cancelPreviousPerformRequestsWithTarget:selector:object: Cancels perform requests

TextView state_pressed/state_focused/state_selected style change

由 白昼怎懂夜的黑 提交于 2020-01-01 09:28:11
问题 I'm trying to change a TextView style based on its state. My styles.xml contains: <style name="text_normal_ops"> <item name="android:gravity">left</item> <item name="android:textColor">@color/text_usual_color</item> <item name="android:textStyle">bold</item> </style> <style name="text_normal_ops_pressed"> <item name="android:gravity">left</item> <item name="android:textColor">@color/text_pressed</item> <item name="android:textStyle">bold</item> </style> My selector ( text_ops.xml )is defined

jquery access iframe id from iframe content

由 99封情书 提交于 2020-01-01 05:59:27
问题 i am trying to do something with jquery. i have code like this 1.html; <html> <head> <script language="javascript" type="text/javascript" src="jquery.js"></script> </head> <body> <iframe src="2.html" id="frame1"></iframe> <iframe src="3.html" id="frame2"></iframe> </body> </html> in 2.html file. i am trying to access iframe container id. 2.html file content; <html> <head> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript"> $(document).ready(function (){ $(

Jquery select clicked element within a set of elements with the same classname

由 a 夏天 提交于 2020-01-01 04:37:09
问题 Maybe you guys can help me out with this, I've been struggling with it for the past 30 minutes. Let's say I have four elements with the same class. <div class="test">hi</div> <div class="test">hey</div> <div class="test">yo</div> <div class="test">What's up</div> How can I select the one that was clicked on? I was able to get it work like this: $('.test').click(function() { $(this).toggleClass("btn-danger btn-success"); }); However, I need it to fire without being clicked on success after an
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