Objective-c – How to close a window programmatically in Cocoa Mac

cocoamacosobjective cwindowxib

How can I programmatically close a window in cocoa mac ? I have opened a second window/xib from the first window/xib using button click. I need to close the first window/xib programmatically on opening or clicking the button. How can I do that?

Best Answer

Apple has some useful sample code on Nib Loading. It doesn't directly address this question however; the following code does.

@interface CloseWindowAppDelegate : NSObject <NSApplicationDelegate> {
    NSWindow *window;
    IBOutlet NSWindow * secondWindow;
    NSNib * secondNib;
}

@property (assign) IBOutlet NSWindow *window;

- (IBAction)openSecondWindow:(id)sender;

- (IBAction)closeSecondWindow:(id)sender;

@end

#import "CloseWindowAppDelegate.h"

@implementation CloseWindowAppDelegate

@synthesize window;

- (IBAction)openSecondWindow:(id)sender {
    secondNib = [[NSNib alloc] initWithNibNamed:@"SecondWindow" bundle:nil];
    [secondNib instantiateNibWithOwner:self topLevelObjects:nil];
    [secondWindow makeKeyAndOrderFront:nil];

}

- (IBAction)closeSecondWindow:(id)sender {
    [secondWindow close];
    [secondNib release];

}

@end

Related Solutions

Ios – How to make a UITextField move up when the keyboard is present – on starting to edit

You will only need a ScrollView if the contents you have now do not fit in the iPhone screen. (If you are adding the ScrollView as the superview of the components just to make the TextField scroll up when keyboard comes up, then it's not needed.)
The standard way to prevent the TextFields from being covered by the keyboard is to move the view up/down whenever the keyboard is shown.

Here is some sample code:

#define kOFFSET_FOR_KEYBOARD 80.0

-(void)keyboardWillShow {
    // Animate the current view out of the way
    if (self.view.frame.origin.y >= 0)
    {
        [self setViewMovedUp:YES];
    }
    else if (self.view.frame.origin.y < 0)
    {
        [self setViewMovedUp:NO];
    }
}

-(void)keyboardWillHide {
    if (self.view.frame.origin.y >= 0)
    {
        [self setViewMovedUp:YES];
    }
    else if (self.view.frame.origin.y < 0)
    {
        [self setViewMovedUp:NO];
    }
}

-(void)textFieldDidBeginEditing:(UITextField *)sender
{
    if ([sender isEqual:mailTf])
    {
        //move the main view, so that the keyboard does not hide it.
        if  (self.view.frame.origin.y >= 0)
        {
            [self setViewMovedUp:YES];
        }
    }
}

//method to move the view up/down whenever the keyboard is shown/dismissed
-(void)setViewMovedUp:(BOOL)movedUp
{
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3]; // if you want to slide up the view

    CGRect rect = self.view.frame;
    if (movedUp)
    {
        // 1. move the view's origin up so that the text field that will be hidden come above the keyboard 
        // 2. increase the size of the view so that the area behind the keyboard is covered up.
        rect.origin.y -= kOFFSET_FOR_KEYBOARD;
        rect.size.height += kOFFSET_FOR_KEYBOARD;
    }
    else
    {
        // revert back to the normal state.
        rect.origin.y += kOFFSET_FOR_KEYBOARD;
        rect.size.height -= kOFFSET_FOR_KEYBOARD;
    }
    self.view.frame = rect;

    [UIView commitAnimations];
}


- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    // register for keyboard notifications
    [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardWillShow)
                                             name:UIKeyboardWillShowNotification
                                           object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardWillHide)
                                             name:UIKeyboardWillHideNotification
                                           object:nil];
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    // unregister for keyboard notifications while not visible.
    [[NSNotificationCenter defaultCenter] removeObserver:self
                                             name:UIKeyboardWillShowNotification
                                           object:nil];

    [[NSNotificationCenter defaultCenter] removeObserver:self
                                             name:UIKeyboardWillHideNotification
                                           object:nil];
}

Macos – Find (and kill) process locking port 3000 on Mac

You can try netstat
```
 netstat -vanp tcp | grep 3000
```
For macOS El Capitan and newer (or if your netstat doesn't support -p), use lsof
```
 lsof -i tcp:3000 
```
For Centos 7 use:
```
 netstat -vanp --tcp | grep 3000
```

Best Answer

Related Solutions

Ios – How to make a UITextField move up when the keyboard is present – on starting to edit

Macos – Find (and kill) process locking port 3000 on Mac

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