UIBarbuttonItem 不在工具栏右侧

发布于 2024-08-07 22:28:42 字数 984 浏览 8 评论 0原文

我的视图控制器中的 viewDidLoad 中有这样的代码。但 UIBarButtonItem 不在工具栏的右侧。它位于左侧。如何给工具栏赋予标题？

UIToolbar *toolbar = [UIToolbar new];
toolbar.barStyle = UIBarStyleBlackTranslucent;

// create a bordered style button with custom title
UIBarButtonItem *playItem = [[[UIBarButtonItem alloc] initWithTitle:@"Play" 
            style:UIBarButtonItemStyleBordered  
            target:self
            action:@selector(flipToSchedules:)] autorelease];
self.navigationItem.rightBarButtonItem = playItem;
NSArray *items = [NSArray arrayWithObjects: playItem,  nil];
toolbar.items = items;

// size up the toolbar and set its frame
// please not that it will work only for views without Navigation toolbars. 
[toolbar sizeToFit];
CGFloat toolbarHeight = [toolbar frame].size.height;
CGRect mainViewBounds = self.view.bounds;

[toolbar setFrame:CGRectMake(0, 20, 
             CGRectGetWidth(mainViewBounds), toolbarHeight)];
[self.view addSubview:toolbar];

原文

I have code in my view controller in viewDidLoad like this. But the UIBarButtonItem is not on the right side of the tool bar. It is in left side. How to give title to toolbar also?

UIToolbar *toolbar = [UIToolbar new];
toolbar.barStyle = UIBarStyleBlackTranslucent;

// create a bordered style button with custom title
UIBarButtonItem *playItem = [[[UIBarButtonItem alloc] initWithTitle:@"Play" 
            style:UIBarButtonItemStyleBordered  
            target:self
            action:@selector(flipToSchedules:)] autorelease];
self.navigationItem.rightBarButtonItem = playItem;
NSArray *items = [NSArray arrayWithObjects: playItem,  nil];
toolbar.items = items;

// size up the toolbar and set its frame
// please not that it will work only for views without Navigation toolbars. 
[toolbar sizeToFit];
CGFloat toolbarHeight = [toolbar frame].size.height;
CGRect mainViewBounds = self.view.bounds;

[toolbar setFrame:CGRectMake(0, 20, 
             CGRectGetWidth(mainViewBounds), toolbarHeight)];
[self.view addSubview:toolbar];

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泪眸﹌ 2024-08-14 22:28:42

将 playItem 指定为 self.navigationItem 的 rightBarButtonItem 没有意义，因为这会将按钮设置为导航栏的按钮顶部，并且您想将其放置在工具栏（底部）中

要解决此问题，您必须创建另一个具有灵活宽度的按钮并将其添加为工具栏的第一项：

UIBarButtonItem *flexible = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
toolbar.items = [NSArray arrayWithObjects:flexible, playItem, nil];
[flexible release];

Assigning the playItem as the rightBarButtonItem of self.navigationItem does not make sense, since that will set the button as a button of the navigation bar at the top, and you want to place it in the toolbar (at the bottom)

To solve this, you'll have to create another button with a flexible width and add that as the first item of the toolbar:

UIBarButtonItem *flexible = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
toolbar.items = [NSArray arrayWithObjects:flexible, playItem, nil];
[flexible release];

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