如何将多个UIBarButtonItems添加到NavigationBar？

Question

我想在UINavigationBar上绘制多个按钮。它们将位于右侧或左侧。

- Khalid Usman

Answer 1

我做了一个例子，在其中在导航栏右侧有两个按钮（即编辑和+）。

1）你必须创建一个NSMutableArray（在示例中为“buttons”），并将UIBarButtonItem（在示例中为bi1和bi2）添加到NSMutableArray（即“buttons”）中。

2）将NSMutableArray（在示例中为“buttons”）添加到工具栏（即示例中的UIToolbar *tools）中。

3）将工具栏添加到导航栏中。

 NSMutableArray *buttons = [[NSMutableArray alloc] initWithCapacity:2];
 UIToolbar *tools = [[UIToolbar alloc]
                    initWithFrame:CGRectMake(0.0f, 0.0f, 90.0f, 55.01f)];
// Add bar button1.

UIBarButtonItem *bi1 = [[UIBarButtonItem alloc] initWithTitle:@"Edit" style:UIBarButtonItemStylePlain target:self action:@selector(Edit:)];
bi1.style = UIBarButtonItemStyleBordered;
bi1.width = 45;
[buttons addObject:bi1];
//[bi1 release]; Do not release if ARC enabled.

// Add bar button2.
UIBarButtonItem *bi2 = [[UIBarButtonItem alloc] initWithTitle:@"+" style:UIBarButtonItemStylePlain target:self action:@selector(Add:)];
bi2.style = UIBarButtonItemStyleBordered;
[buttons addObject:bi2];
//[bi2 release]; Do not release if ARC enabled.

// Add buttons to toolbar and toolbar to nav bar.
[tools setItems:buttons animated:NO];
//[buttons release];  Do not release if ARC enabled.

 // Add toolbar to nav bar.
UIBarButtonItem *twoButtons = [[UIBarButtonItem alloc] initWithCustomView:tools];
[tools release];
self.navigationItem.rightBarButtonItem = twoButtons;
//[twoButtons release]; Do not release if ARC enabled.

- rohan-patel

Answer 2

在你的xib文件中完成它，并在头文件中创建属性或变量

@property (nonatomic, retain) IBOutlet UIBarButtonItem *itemOne;

然后在xib中连接它。享受吧

- Novarg

Answer 3

在代码中创建一个新的UIToolbar，并将您的按钮添加到工具栏中。然后将self.navigationItem.rightBarButton设置为您新创建的工具栏（请注意，示例没有使用ARC，因此您可能需要删除对release的调用）：

    // create a toolbar to have two buttons in the right
UIToolbar* tools = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 100, 44.01)];

// create the array to hold the buttons, which then gets added to the toolbar
NSMutableArray* buttons = [[NSMutableArray alloc] initWithCapacity:3];

// create a standard "add" button
UIBarButtonItem* bi = [[UIBarButtonItem alloc]
                       initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addRow)];
bi.style = UIBarButtonItemStyleBordered;
[buttons addObject:bi];
[bi release];

// create a spacer
bi = [[UIBarButtonItem alloc]
      initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
[buttons addObject:bi];
[bi release];

[buttons addObject:self.editButtonItem];

// stick the buttons in the toolbar
[tools setItems:buttons animated:NO];

[buttons release];

// and put the toolbar in the nav bar
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:tools];

- Nathanial Woolls

Answer 4

这里我给你提供了一个示例代码，用于按钮和标签。你可以创建一个按钮来代替我创建的标签和图像。希望它能对你有所帮助。

- (void) setLabelForPotraite {

    bar = [self.navigationController navigationBar];    
    [bar setBackgroundColor:[UIColor clearColor]];
    barImg=[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"navImg.png"]];
    [bar addSubview:barImg];


    tick_img_lbl=[[UIImageView alloc]initWithFrame:CGRectMake(86, 6,34, 33)];
    tick_img_lbl.image=[UIImage imageNamed:@"tick-1.png"];
    [bar addSubview:tick_img_lbl];
    [tick_img_lbl release];

    tickCount_lbl=[[UILabel alloc] initWithFrame:CGRectMake(126, 2, 50, 40)];
    tickCount_lbl.text=@"";
    tickCount_lbl.font=[UIFont fontWithName:@"Arial" size:24.0];
    [tickCount_lbl setTextAlignment:UITextAlignmentCenter];
    tickCount_lbl.font = [UIFont boldSystemFontOfSize:24.0];
    tickCount_lbl.textColor=[UIColor whiteColor];
    tickCount_lbl.backgroundColor=[UIColor clearColor];
    [bar addSubview:tickCount_lbl];
    [tickCount_lbl release];

    cross_img_lbl=[[UIImageView alloc]initWithFrame:CGRectMake(181, 6, 34, 33)];
    cross_img_lbl.image=[UIImage imageNamed:@"x_green.png"];

    [bar addSubview:cross_img_lbl];
    [cross_img_lbl release];

    crossCount_lbl=[[UILabel alloc] initWithFrame:CGRectMake(221, 2, 50, 40)];
    crossCount_lbl.text=@"";
    crossCount_lbl.font=[UIFont fontWithName:@"Arial" size:24.0];
    crossCount_lbl.font = [UIFont boldSystemFontOfSize:24.0];
    crossCount_lbl.textColor=[UIColor whiteColor];
    [crossCount_lbl setTextAlignment:UITextAlignmentCenter];
    crossCount_lbl.backgroundColor=[UIColor clearColor];
    [bar addSubview:crossCount_lbl];
    [crossCount_lbl release];

    master_img_lbl=[[UIImageView alloc]initWithFrame:CGRectMake(269, 6, 34, 33)];
    master_img_lbl.image=[UIImage imageNamed:@"thumb.png"];
    [bar addSubview:master_img_lbl];
    [master_img_lbl release];

}

如果有任何理解上的问题或其他问题，请告诉我。

- sandy