Window is not releasing when switching to another window

问题

I am creating a Mac application in which I have mainwindow with some buttons.

When I click button it will open a DetailWindow with NSTableview. Every buttonclickevent change the data in NSTableView.

Here is my code:

In my mainWindow.m FIle

- (IBAction)btn1Event:(id)sender {
    if (!detailwindow) {
        detailwindow = [[DetailWindow alloc] initWithWindowNibName:@"DetailWindow"];
        detailwindow.mainwindow = self;
    }

    detailwindow.title = @"First";
    [detailwindow showWindow:self];
}

- (IBAction)btn2Event:(id)sender{
    if (!detailwindow) {
        detailwindow = [[DetailWindow alloc] initWithWindowNibName:@"DetailWindow"];
        detailwindow.mainwindow = self;
    }

    detailwindow.title = @"Second";
    [detailwindow showWindow:self];
}

In DetailWindow

- (void)windowDidLoad
{
     [super windowDidLoad];
     [tableView setBackgroundColor:[NSColor clearColor]];
     [tableView setHeaderView:nil];

    if([title isEqualToString:@"First"]){
        [arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"MS.png"],@"image",@"first image",@"text", nil]];
        [arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"CVS.png"],@"image",@"second image",@"text", nil]];
        [arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"NS.png"],@"image",@"first image",@"text", nil]];
        [arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"EM.png"],@"image",@"second image",@"text", nil]];
        [arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"RES.png"],@"image",@"first image",@"text", nil]];
    }

    if ([title isEqualToString:@"Second"]) {
        [arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"RS.png"],@"image",@"second image",@"text", nil]];
        [arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"FB.png"],@"image",@"first image",@"text", nil]] ;
        [arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"GT.png"],@"image",@"second image",@"text", nil]];
        [arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"SKIN.png"],@"image",@"first image",@"text", nil]];
        [arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"GP.png"],@"image",@"second image",@"text", nil]];
    }

    [tableView reloadData];
}

- (IBAction)GoToMainWindow:(id)sender {
    [mainwindow showWindow:self];
}

If i click first button this if([title isEqualToString:@"First"]) event call and I can see first five image in my tableview.

After that if I click second button I can't see the next five image in table. Data is not changing because if ([title isEqualToString:@"Second"]) this event is not being call.
If I first click second button then same thing happen with first event.

Any idea why? I think window is not releasing when I click any of button at secondly.

回答1:

No, that's because your insert image method is in the -(void)windowDidLoad method, which gets called on when the window is loaded, not when you call the showWindow: method so it only gets called once. Instead of calling the showWindow: method in mainWindow.m, create a new method in DetailWindow instead and call that when you click the button.


- (IBAction)btn1Event:(id)sender {

if (!detailwindow) {
    detailwindow = [[DetailWindow alloc] initWithWindowNibName:@"DetailWindow"];
    detailwindow.mainwindow = self;

}
detailwindow.title = @"First";
[detailwindow addImageToTableView]; //It doesn't have to be named like that.  Your choice
}

- (IBAction)btn2Event:(id)sender{

if (!detailwindow) {
    detailwindow = [[DetailWindow alloc] initWithWindowNibName:@"DetailWindow"];
    detailwindow.mainwindow = self;
}
detailwindow.title = @"Second";
[detailwindow addImageToTableView];

//DetailWindow

- (void)addImageToTableView
{
 [super windowDidLoad];
 [tableView setBackgroundColor:[NSColor clearColor]];
 [tableView setHeaderView:nil];

if([title isEqualToString:@"First"]){

[arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"MS.png"],@"image",@"first image",@"text", nil]];
[arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"CVS.png"],@"image",@"second image",@"text", nil]];
[arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"NS.png"],@"image",@"first image",@"text", nil]];
[arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"EM.png"],@"image",@"second image",@"text", nil]];
[arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"RES.png"],@"image",@"first image",@"text", nil]];

}

if ([title isEqualToString:@"Second"]) {

[arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"RS.png"],@"image",@"second image",@"text", nil]];
[arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"FB.png"],@"image",@"first image",@"text", nil]] ;
[arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"GT.png"],@"image",@"second image",@"text", nil]];
[arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"SKIN.png"],@"image",@"first image",@"text", nil]];
[arrayController addObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSImage imageNamed:@"GP.png"],@"image",@"second image",@"text", nil]];

}
[tableView reloadData];
}
- (IBAction)GoToMainWindow:(id)sender {

[mainwindow showWindow:self];

}

It's definitely not the best code you should have. Just make some changes to the code above and it should be sufficient.

来源：https://stackoverflow.com/questions/7553370/window-is-not-releasing-when-switching-to-another-window

标签

cocoa

nstableview

nswindowcontroller