selector

I have a button in my UIView that is created like so: UIBarButtonItem *editButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:self action:@selector(toggleEdit)]; self.navigationItem.rightBarButtonItem = editButton; [editButton release]; And this is the action method: -(void) toggleEdit:(id)sender { } but I get this error 2011-09-02 15:27:13.362 blubb[15006:207] -[DatabaseSelectionViewController toggleEdit]: unrecognized selector sent to instance 0x5a29d80 2011-09-02 15:27:13.365 blubb[15006:207] * Terminating app due to uncaught exception

I have a MainViewController embed in a Navigation Controller, as shown below: And in MainViewController.swift, I added two UIBarButtonItem(left and right) programmatically: class MainViewController: UIViewController { let rightButton = UIBarButtonItem(title: "Right", style: .plain, target: self, action: #selector(onRightClick)) let leftButton = UIBarButtonItem(title: "Left", style: .plain, target: self, action: #selector(onLeftClick)) override func viewDidLoad() { super.viewDidLoad() navigationItem.rightBarButtonItem = rightButton navigationItem.leftBarButtonItem = leftButton } override func

I have a problem of using selector that it does not work as what I expect. I wanna click on it then it gives me reaction and I select it(By long click but I probably do it through programmatic way) then it gives me another reaction. However, it reacts nothing in result.... reaction part: <TableRow android:layout_width="match_parent" android:layout_height="wrap_content" android:weightSum="10" android:padding="5dp" android:background="@drawable/border_bottom" > <LinearLayout android:layout_weight="9" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation=

I recently converted my project from Objective-C to Swift and in doing so I acquired this error whenever I click a button in the table view's cell. I have multiple cells being filled with information from a mysql server. I have two buttons, a follow button and followed button, when one is clicked the other is supposed to show. I've been working on this for a while but I've been stuck on this error. Error I'm getting when I click the button in the tableview CustomCellSwift[1425:372289] -[CustomCellSwift.ViewController followButtonClick:]: unrecognized selector sent to instance 0x100b13a40 In

I wish to write a macro, to be used within any method, which references the method's selector. I do not wish to pass the literal name of the method. For example: #define RERUN [self performSelector:{something} withObject:nil afterDelay: 0.0] where the "{something}" in the above would resolve to the selector of whatever method the macro was used in. Is there some way to do this? _cmd represents the selector of the current method -- it is a hidden argument (like self ). if you never need arguments, or nil is suitable for your purpose - all you need to do is write: #define RERUN [self

I know that ID is a faster selector than class in Javascript. But what if I cache the selector? When the selector is cached, would it differ in speed if it’s a class selector, or will it be as fast as the id selector? Example: <div class=”myclass”></div> <div id=”myid”></div> var $myclass = $('.myclass'); var $myid = $('#myid'); Will $myid be faster than than $myclass? You have those stored in variables. So the speed will be the same for both. The performance hit will occur when you are iterating DOM to get elements. At that time ID selector will be faster than class selector. The cached

I've seen suggestions on using JavaScript for detecting and acting on text that overflows an HTML element. But it's 2013, so I was wondering if maybe the CSS spec had a way to detect overflows itself. In other words if I have a fixed size div: <div class="smart-warning" style="width:200px; height:20px; overflow:hidden"> This is my very long text that would overflow the box. </div> I'd like to have a style that would do something if the text overflowed such as: <style> .smart-warning { border:1px solid black } .smart-warning:overflowing { border:1px solid red } </style> It seems like we'd be