NSMutableArray removeObjectAtIndex 和 NSTabView

Question

我的程序是一个带有 MMTabBarView 的网络浏览器。关闭选项卡的问题通过查看 log.I 已从 NSMutableArray * browserViews; 中看到在 willCloseTabViewItem 中调用 [browserViews removeObjectAtIndex: index]; 时关闭无效元素这是代码： .h

{
    IBOutlet NSTabView *tabView;
    IBOutlet MMTabBarView *tabBarControl;
    IBOutlet NSSearchField *searchField;
    IBOutlet NSView *mainView;
    NSMutableArray *browserViews;
}
- (MMTabBarView *)tabBarControl;
- (ERBrowser *)addWebView:(NSURL *)url;
- (void)addDefaultTabs;

.m

- (id)initWithWindow:(NSWindow *)window
        {
            if (self = [super initWithWindow:window])
            {
                browserViews = [[NSMutableArray alloc] init];
            }
            return self;
        }

- (void)windowDidLoad{
            [super windowDidLoad];
           for (NSTabViewItem *item in [tabView tabViewItems])
                [tabView removeTabViewItem:item];
            [tabView setAutoresizesSubviews:true];
            [searchField setDelegate:self];
            [tabBarControl setDelegate:self];   
        }

- (ERBrowser *)addWebView:(NSURL *)url{
            for (NSView *view in browserViews)
                [view setHidden:false];
            ERTabModel *tabModel = [[ERTabModel alloc] init];
            NSTabViewItem *tabViewItem = [[NSTabViewItem alloc] initWithIdentifier:tabModel];
            [tabView addTabViewItem:tabViewItem];
            [tabView selectTabViewItem:tabViewItem];
            ERBrowser *browserView = [[ERBrowser alloc] initWithFrame:mainView.frame];
            [browserView setAutoresizingMask:(NSViewWidthSizable | NSViewHeightSizable)];
            [mainView addSubview:browserView];
            [browserViews addObject:browserView];
            [browserView setUIDelegate:self];
            [browserView setFrameLoadDelegate:self];
            NSLog(@"%@", browserViews);
            if (url)
                [[browserView mainFrame] loadRequest:[NSURLRequest requestWithURL:url]];
            return browserView;
        }

- (void)addDefaultTabs {
            [self addWebView:[NSURL URLWithString:@"http://google.com"]];
        }

- (MMTabBarView *)tabBarControl {
            return tabBarControl;
        }

// Method called when webView javascript requests new window with request
- (WebView *)webView:(WebView *)sender createWebViewWithRequest:(NSURLRequest *)request
        {
            NSLog(@"createWebViewWithRequest!");
            return [self addWebView:[request URL]];
        }
// MMTabBarVievDelegate
- (void)tabView:(NSTabView *)aTabView didSelectTabViewItem:(NSTabViewItem *)tabViewItem {
        NSUInteger index = [aTabView indexOfTabViewItem:tabViewItem];
        NSLog(@"didSelectTabViewItem Index %ld", (long)index);

        if ([browserViews count] > index)
        {
            for (NSView *view in browserViews)
                [view setHidden:true];
            ERBrowser *browserView = browserViews[index];
            [browserView setHidden:false];
            NSLog(@"Index change focus tab %ld", (long)index);

            [searchField setStringValue:@""];
            [tabViewItem setLabel:[browserView stringByEvaluatingJavaScriptFromString:@"document.title"]];
        }

    }

- (void)tabView:(NSTabView *)aTabView willCloseTabViewItem:(NSTabViewItem *)tabViewItem
    {

        NSUInteger index = [aTabView indexOfTabViewItem:[tabView selectedTabViewItem]];
            NSLog(@"willCloseTabViewItem Index %ld", (long)index);
       if ([browserViews count] > index)
       {
            [browserViews removeObjectAtIndex:index];
            NSLog(@"%@" @"%ld", browserViews, (long)index);
       }
    }

并记录：程序加载默认Tab google.com:

2015-03-26 17:51:57.634 ERClient[89171:26065490] didSelectTabViewItem Index 0

2015-03-26 17:51:59.030 ERClient[89171:26065490] (ERBrowser: 0x600000124060)

2015-03-26 17:52:02.278 ERClient[89171:26065490] didReceiveTitle!

Gmail 在新标签页中打开：

2015-03-26 17:53:51.994 ERClient[89171:26065490] createWebViewWithRequest!

2015-03-26 17:53:51.995 ERClient[89171:26065490] didSelectTabViewItem Index 1

2015-03-26 17:53:52.035 ERClient[89171:26065490] (ERBrowser: 0x600000124060, ERBrowser: 0x600000121cc0)

2015-03-26 17:53:53.987 ERClient[89171:26065490] didReceiveTitle!

2015-03-26 17:53:56.451 ERClient[89171:26065490] didReceiveTitle!

2015-03-26 17:53:59.003 ERClient[89171:26065490] didReceiveTitle! - I do not understand why this happens 3 times instead of 2

将焦点放在索引为 1 的 Tab 2 上，我将焦点更改为第一个 Tab 索引 0，然后 return 返回：

2015-03-26 17:57:56.384 ERClient[89171:26065490] didSelectTabViewItem Index 0

2015-03-26 17:57:56.477 ERClient[89171:26065490] Index change focus tab 0

2015-03-26 17:57:58.206 ERClient[89171:26065490] didSelectTabViewItem Index 1

2015-03-26 17:57:58.207 ERClient[89171:26065490] Index change focus tab 1

现在我关闭索引为 1 的选项卡 2：

2015-03-26 17:58:55.691 ERClient[89171:26065490] willCloseTabViewItem Index 1

2015-03-26 17:58:55.691 ERClient[89171:26065490] (ERBrowser: 0x600000124060) 1

2015-03-26 17:58:55.692 ERClient[89171:26065490] didSelectTabViewItem Index 0

2015-03-26 17:58:55.693 ERClient[89171:26065490] Index change focus tab 0

事实证明，打开带有有效标题的选项卡 1，但内容保留在选项卡 2 中：

如果我打开另一个Tab，也会显示gmail 告诉我如何解决它或在哪里阅读为什么会发生这种情况

Answer 1

问题已自行解决。问题是由于我在编程方面有一点经验。现在我将描述为什么不工作。当您从 NSMutableArray 中删除一个对象时，加载页面仍然保留 WebView 对象。有必要添加 [browserView removeFromSuperview];

代码如下：

- (void)tabView:(NSTabView *)aTabView willCloseTabViewItem:(NSTabViewItem *)tabViewItem
{
    NSUInteger index = [aTabView indexOfTabViewItem:[tabView selectedTabViewItem]];
   if ([browserViews count] > index)
   {
       ERBrowser *browserView = browserViews[index];
       [browserViews removeObjectAtIndex:index];
       [browserView removeFromSuperview];
   }
}

也许将来有人会用得上创建一个带有标签栏的网络浏览器

Answer 2

此外，您应该根据文档调用 super 方法：

/* Implemented methods from NSTabViewDelegate. These require a call to super if overriden by a subclass. */
- (void)tabView:(NSTabView *)tabView willSelectTabViewItem:(nullable NSTabViewItem *)tabViewItem NS_REQUIRES_SUPER;
- (void)tabView:(NSTabView *)tabView didSelectTabViewItem:(nullable NSTabViewItem *)tabViewItem NS_REQUIRES_SUPER;
- (BOOL)tabView:(NSTabView *)tabView shouldSelectTabViewItem:(nullable NSTabViewItem *)tabViewItem NS_REQUIRES_SUPER;

NSMutableArray removeObjectAtIndex 和 NSTabView

NSMutableArray removeObjectAtIndex and NSTabView

macos

objective-c

webview

nsmutablearray

nstabview