将工具栏添加到UITableViewController

Question

将UIToolBar添加到UITableViewController的最简单方法是什么？我依赖于编辑功能,所以我无法轻松地将UITableViewController更改为UIViewController.

Answer 1

没问题,UITableViewController是一个子类UIViewController.事实上,在iPhone OS 3.0中,任何UIViewController (和子类)都可以与a一起工作,UINavigationController以提供上下文感知工具栏.

为了实现这一目标,您必须:

• 确保使用a UINavigationController来包含需要工具栏的所有视图控制器.
• 设置toolbarsItems想要工具栏的视图控制器的属性.

这几乎和设置视图控制器的标题一样简单,应该以相同的方式完成.最有可能通过覆盖initWithNibName:bundle:初始化程序.举个例子:

-(id)initWithNibName:(NSString*)name bundle:(NSBundle*)bundle;
{
  self = [super initWithNibName:name bundle:bundle];
  if (self) {
    self.title = @"My Title";
    NSArray* toolbarItems = [NSArray arrayWithObjects:
        [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd 
                                                      target:self
                                                      action:@selector(addStuff:)],
        [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSearch 
                                                      target:self
                                                      action:@selector(searchStuff:)],
        nil];
    [toolbarItems makeObjectsPerformSelector:@selector(release)];
    self.toolbarItems = toolbarItems;
    self.navigationController.toolbarHidden = NO;
  }
  return self;
}

您也可以使用setToolbarItems:animated:而不是分配给toolbarItems属性,以动态方式添加和删除工具栏项.

Answer 2

为了使PeyloW的配方工作,我需要添加以下额外的代码行:

self.navigationController.toolbarHidden = NO;

希望有帮助......

Answer 3

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    //Initialize the toolbar
    toolbar = [[UIToolbar alloc] init];
    toolbar.barStyle = UIBarStyleDefault;

    //Set the toolbar to fit the width of the app.
    [toolbar sizeToFit];

    //Caclulate the height of the toolbar
    CGFloat toolbarHeight = [toolbar frame].size.height;

    //Get the bounds of the parent view
    CGRect rootViewBounds = self.parentViewController.view.bounds;

    //Get the height of the parent view.
    CGFloat rootViewHeight = CGRectGetHeight(rootViewBounds);

    //Get the width of the parent view,
    CGFloat rootViewWidth = CGRectGetWidth(rootViewBounds);

    //Create a rectangle for the toolbar
    CGRect rectArea = CGRectMake(0, rootViewHeight - toolbarHeight, rootViewWidth, toolbarHeight);

    //Reposition and resize the receiver
    [toolbar setFrame:rectArea];

    //Create a button
    UIBarButtonItem *infoButton = [[UIBarButtonItem alloc]
                                   initWithTitle:@"back" style:UIBarButtonItemStyleBordered target:self action:@selector(info_clicked:)];

    [toolbar setItems:[NSArray arrayWithObjects:infoButton,nil]];

    //Add the toolbar as a subview to the navigation controller.
    [self.navigationController.view addSubview:toolbar];



[[self tableView] reloadData];

}

- (void) info_clicked:(id)sender {


 [self.navigationController popViewControllerAnimated:YES];
    [toolbar removeFromSuperview];

    }

在Swift 3中:

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)

    //Initialize the toolbar
    let toolbar = UIToolbar()
    toolbar.barStyle = UIBarStyle.default

    //Set the toolbar to fit the width of the app.
    toolbar.sizeToFit()

    //Caclulate the height of the toolbar
    let toolbarHeight = toolbar.frame.size.height

    //Get the bounds of the parent view
    let rootViewBounds = self.parent?.view.bounds

    //Get the height of the parent view.
    let rootViewHeight = rootViewBounds?.height

    //Get the width of the parent view,
    let rootViewWidth = rootViewBounds?.width

    //Create a rectangle for the toolbar
    let rectArea = CGRect(x: 0, y: rootViewHeight! - toolbarHeight, width: rootViewWidth!, height: toolbarHeight)

    //Reposition and resize the receiver
    toolbar.frame = rectArea

    //Create a button
    let infoButton = UIBarButtonItem(title: "Back", style: UIBarButtonItemStyle.plain, target: self, action: #selector(infoClicked))

    toolbar.items = [infoButton]

    //Add the toolbar as a subview to the navigation controller.
    self.navigationController?.view.addSubview(toolbar)
}

func infoClicked() {
    //Handle Click Here
}