如何在模态视图的工具栏上添加标题和完成按钮

Question

我尝试从导航视图控制器 (DateViewController) 呈现模式视图 (InfoViewController)。

我在 InfoViewContoller 的视图顶部添加了一个工具栏。现在我想在工具栏上添加一个标题“信息”和一个“完成”按钮。（完成按钮将执行 infoDismissAction 方法）

谁能给我一些建议？非常感谢！

这里是 DateViewController.h 的代码

#import <UIKit/UIKit.h>
#import "InfoViewController.h"
@interface DateViewController : UIViewController 
{
    InfoViewController *infoViewController;
}
@property (nonatomic, retain) InfoViewController *infoViewController;
@end

DateViewController.m

- (IBAction)modalViewAction:(id)sender{    
    if (self.infoViewController == nil)
        self.infoViewController = [[[InfoViewController alloc] initWithNibName:
                                   NSStringFromClass([InfoViewController class]) bundle:nil] autorelease];
    [self presentModalViewController:self.infoViewController animated:YES];
}

- (void)dealloc{
    if (self.infoViewController != nil)
    {
        [infoViewController release];
    }
    [super dealloc];
}

- (void)viewDidLoad{
    self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:@"Info"  style:UIBarButtonSystemItemPlay target:self  action:@selector(modalViewAction:)] autorelease];
    [modalBarButtonItem release];
    [super viewDidLoad];
}

这里是 InfoViewController.m

- (IBAction)infoDismissAction:(id)sender{
    [self.parentViewController dismissModalViewControllerAnimated:YES];
}

- (void)viewDidLoad {
    UIToolbar *toolBar;
    toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 50)];
    toolBar.frame = CGRectMake(0, 0, 320, 50);
    toolBar.barStyle = UIBarStyleDefault;
    [toolBar sizeToFit];        
    [self.view addSubview:toolBar]; 
    [toolBar release];
    [backButton release];
    [super viewDidLoad];
}

Answer 1

试试这个代码。

- (void)viewDidLoad {
       UIToolbar *toolBar;
            toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 50)];
            toolBar.frame = CGRectMake(0, 0, 320, 50);
            toolBar.barStyle = UIBarStyleDefault;
            [toolBar sizeToFit];      
UIBarButtonItem *flexibleSpace = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil] autorelease];
UIBarButtonItem *infoButton = [[[UIBarButtonItem alloc] initWithTitle:@"INFO" style:UIBarButtonItemStyleBordered target:self action:@selector(InfoAction:)] autorelease];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:@"DONE" style:UIBarButtonItemStyleBordered target:self action:@selector(doneAction:)];


            NSArray *barButton  =   [[NSArray alloc] initWithObjects:flexibleSpace,infoButton,flexibleSpace,doneButton,nil];
            [toolBar setItems:barButton];

        [self.view addSubview:toolBar];
        [toolBar release];
        [barButton release];
        barButton = nil;
        [super viewDidLoad];

}

Answer 2

我建议使用您的 InfoViewController 设置另一个 UINavigationController 并将导航控制器呈现为您的模态视图。

要回答您的问题，您需要像这样填写您的 UIToolbar：

- (void)viewDidLoad {
  [super viewDidLoad];
  UIToolbar *toolBar;
  toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 50)];
  toolBar.frame = CGRectMake(0, 0, 320, 50);
  toolBar.barStyle = UIBarStyleDefault;
  [toolBar sizeToFit];        
  [self.view addSubview:toolBar]; 
  [toolBar release];

  UIBarButtonItem* bbiInfo = [[UIBarButtonItem alloc] initWithTitle:@"Info" style:UIBarButtonItemStyleBordered target:self action:@selector(tappedInfoButton)];
  UIBarButtonItem* flexibleSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
  UIBarButtonItem* bbiDone = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(tappedDoneButton)];
  NSArray* items = [[NSArray alloc] initWithObjects:bbiInfo, flexibleSpace, bbiDone, nil];
  [toolBar setItems:items];

  [items release];
  [bbiInfo release];
  [flexibleSpace release];
  [bbiDone release];
}