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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日志来关闭无效元素。我已经看到，从NSMutableArray * browserViews;调用[browserViews removeObjectAtIndex: index];willCloseTabViewItem 时开始，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：程序加载默认选项卡 google.com：

2015-03-26 17:51:57.634 ERClient[89171:26065490] didSelectTabViewItem 索引 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] 创建WebViewWithRequest！

2015-03-26 17:53:51.995 ERClient[89171:26065490] didSelectTabViewItem 索引 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！- 我不明白为什么会发生 3 次而不是 2 次

关注索引为 1 的 Tab 2，我将焦点更改为第一个 Tab 索引 0，然后返回：

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

2015-03-26 17:57:56.477 ERClient[89171:26065490] 索引更改焦点选项卡 0

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

2015-03-26 17:57:58.207 ERClient[89171:26065490] 索引更改焦点选项卡 1

现在我用索引 1 关闭 Tab 2：

2015-03-26 17:58:55.691 ERClient[89171:26065490] willCloseTabViewItem 索引 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 索引 0

2015-03-26 17:58:55.693 ERClient[89171:26065490] 索引更改焦点选项卡 0

事实证明，使用有效标题打开 Tab 1 但内容仍保留在 Tab 2 上： 在此处输入图像描述

如果我打开另一个选项卡，也会显示 gmail 告诉我如何修复它或在哪里阅读为什么会发生这种情况

4

2 回答 2

0

问题自己解决了。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。当你从 NSMutableArray 中删除一个对象时，加载的页面仍然是 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];
   }
}

也许将来有人会用标签栏创建一个 Web 浏览器

于 2015-03-27T09:49:20.090 回答
0

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;
于 2018-07-06T18:43:39.007 回答