3

这是一个奇怪的问题。

情况是我想调整 UIBarButtonItem(s) 之间的间距，使它们仅相隔 2 个像素。

我可以很容易地用 UIToolbar 做到这一点：

 // Make bottom button bar buttons
 NSMutableArray *bottomButtons = [[NSMutableArray alloc] initWithCapacity:3];

 // Create spacer between buttons
 UIBarButtonItem *spacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
 [bottomButtons addObject:spacer];
 UIBarButtonItem* noSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
 noSpace.width = -10;


 // Add button 1
 self.addAlbumButton = [UIGlossyButton  buttonWithType:UIButtonTypeCustom];
 [self.addAlbumButton setTitle:@"Button 1" forState:UIControlStateNormal];
 [self.addAlbumButton addTarget:self action:@selector(addAlbum:) forControlEvents:UIControlEventTouchUpInside];
 self.addAlbumBarButton = [[UIBarButtonItem alloc] initWithCustomView:self.addAlbumButton];
 [bottomButtons addObject:self.addAlbumBarButton];

 [bottomButtons addObject:noSpace];

 // Add button2
 self.downloadAllItemsButton = [UIGlossyButton  buttonWithType:UIButtonTypeCustom];
 [self.downloadAllItemsButton setTitle:@"Button 2" forState:UIControlStateNormal];
 [self.downloadAllItemsButton addTarget:self action:@selector(downloadAllItemsAction:) forControlEvents:UIControlEventTouchUpInside];
 self.downloadAllItemsBarButton = [[UIBarButtonItem alloc] initWithCustomView:self.downloadAllItemsButton];
 [bottomButtons addObject:self.downloadAllItemsBarButton];

 // add all button to bottom toolbar
 [self.bottomToolbar setItems:bottomButtons];

问题是当我尝试使用导航栏执行此操作时。出于某种原因，当我插入一个固定长度的按钮（具有负值）时，它不会缩小按钮之间的空间。我知道固定长度按钮在那里并且工作，因为如果我将宽度更改为正数，按钮之间的间距会增加。

代码基本相同，只是我没有将按钮添加到 self.bottomToolbar，而是调用以下代码：

 self.navigationItem.rightBarButtonItems = bottomButtons;

我发现与 MasterViewController 相同的问题。我正在使用 splitviewcontroller 并且底部工具栏工作正常，但顶部工具栏有相同的间距问题。那个问题是我不能让按钮之间的空间小于默认值。

似乎 navigationItem.rightBarButtonItems 的工作方式与所有其他工具栏不同。

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2 回答 2

1

将所有 navigationButtonItem 添加到数组后，您可以按以下方式进行操作。我想这对你也有帮助，因为这对我有用，如果你想改变按钮之间的空间，你可以在宏的帮助下改变它

#define ONE_BUTTON_WIDTH 30.0f
#define SPACE_BETWEEN_BUTTONS 12.0f
#define ONE_BUTTON_TOTAL_WIDTH (ONE_BUTTON_WIDTH + SPACE_BETWEEN_BUTTONS)
#define kBookmarksImage [UIImage imageNamed:@"bookmarks.png"]

/* CREATE BOOKMARKS BUTTON */
    UIButton *bookmarksButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, kBookmarksImage.size.width, kBookmarksImage.size.height)];
    [bookmarksButton setImage:kBookmarksImage forState:UIControlStateNormal];
    [bookmarksButton addTarget:target action:@selector(toolbarButtonTapped:) forControlEvents:UIControlEventTouchDown];
    bookmarksButton.tag = kBookmarksButtonTag;

UIBarButtonItem *bookmarksButtonItem = [[UIBarButtonItem alloc] initWithCustomView:bookmarksButton];

UIBarButtonItem *spacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
spacer.width = SPACE_BETWEEN_BUTTONS;
[buttons addObjectsFromArray:@[bookmarksButtonItem,spacer]];


 /* ADD ALL THESE BUTTONS TO CUSTOM TOOLBAR AND TOOLBAR TO NAVIGATION BAR */
UIToolbar *customToolbar = [[UIToolbar alloc]
                            initWithFrame:CGRectMake(0.0f, 0.0f, ([bottomButtons count]/2*ONE_BUTTON_TOTAL_WIDTH), 44.01f)]; // 44.01 shifts it up 1px for some reason

customToolbar.clearsContextBeforeDrawing = NO;
customToolbar.clipsToBounds = NO;
customToolbar.tintColor = [UIColor colorWithWhite:0.305f alpha:0.0f]; // closest I could get by eye to black, translucent style.
customToolbar.barStyle = -1; // clear background
[customToolbar setItems: bottomButtons animated:NO];

UIBarButtonItem *customUIBarButtonitem = [[UIBarButtonItem alloc] initWithCustomView:customToolbar];
self.navigationItem.rightBarButtonItem = customUIBarButtonitem;
于 2013-09-18T19:52:33.150 回答
1

最简单的方法是创建一个方法来为每个 UIBarButtonItem 设置 UIButton，如下所示：

- (UIBarButtonItem*)createAddAlbumBarButtonWithImage:(NSString*)imageName
{
    UIButton* button = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 30, 30)];
    [button setImage:[UIImage imageNamed:imageName] forState:UIControlStateNormal];
    [button addTarget:self action:@selector(addAlbum:) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem* barButton = [[UIBarButtonItem alloc] initWithCustomView:button];

    return barButton;
}
于 2014-08-27T23:51:40.810 回答