macos - NSVIewController 之间的导航

Question

我对 MAC OSX 应用程序开发非常陌生。在我的应用程序中，我有三个 NSViewController，它们是 PracticeController、NoteController 和 QuestionController。我必须从 PracticeController 和 QuestionController 导航到 NoteViewController，然后返回到 NoteController 导航的 viewController。

例如：当我们从 PracticeController 导航到 NoteController，然后当我们从 NoteController 点击后退按钮时，我必须来到 PracticeController，当我们从 QuestionController 导航到 NoteController 时，当我们从 NoteController 点击后退按钮时，我必须来到问题控制器。

请帮助我如何做到这一点？我正在寻找它。谢谢。

Answer 1

好吧，经过长时间的搜索，我找到了一个将 UIKit 移植到 MacOSX 的开源库。
https://github.com/BigZaphod/Chameleon.git
但是对我来说太复杂了，所以我自己写了导航控制器。

NSNavigationController.h

#import <Cocoa/Cocoa.h>

@class BaseViewController;
@interface NSNavigationController : NSResponder
@property (nonatomic, strong) BaseViewController *rootViewController;

- (id)initWithRootViewController:(BaseViewController *)rootViewController;
- (NSView*)view;

- (void)pushViewController:(BaseViewController *)viewController animated:(BOOL)animated;
- (BaseViewController *)popViewControllerAnimated:(BOOL)animated;
@end

NSNavigationController.m

#import "NSNavigationController.h"
#import "AppDelegate.h"
#import "BaseViewController.h"

@interface NSNavigationController ()
@property (nonatomic, strong) NSMutableArray *viewControllerStack;
@end

@implementation NSNavigationController
- (id)initWithRootViewController:(BaseViewController *)rootViewController
{
    self = [super init];
    if (self) {
        self.rootViewController = rootViewController;
        self.rootViewController.navigationController = self;
        self.viewControllerStack = [[NSMutableArray alloc] initWithObjects:self.rootViewController, nil];
    }
    return self;
}

- (NSView*)view
{
    BaseViewController *topViewController = [self.viewControllerStack objectAtIndex:[self.viewControllerStack count] - 1];
    return topViewController.view;
}

- (void)pushViewController:(BaseViewController *)viewController animated:(BOOL)animated
{
    if (viewController != nil) {
        [self removeTopView];
        [self.viewControllerStack addObject:viewController];
        viewController.navigationController = self;
        [self addTopView];
    }
}

- (BaseViewController *)popViewControllerAnimated:(BOOL)animated
{
    BaseViewController *topViewController = [self.viewControllerStack objectAtIndex:[self.viewControllerStack count] - 1];
    [self removeTopView];
    [self.viewControllerStack removeLastObject];
    [self addTopView];

    return topViewController;
}

- (void)removeTopView
{
    BaseViewController *topViewController = [self.viewControllerStack objectAtIndex:[self.viewControllerStack count] - 1];
    [topViewController.view removeFromSuperview];
}

- (void)addTopView
{
    BaseViewController *topViewController = [self.viewControllerStack objectAtIndex:[self.viewControllerStack count] - 1];
    AppDelegate *delegate = (AppDelegate*)[NSApp delegate];
    [delegate.window.contentView addSubview:topViewController.view];
}
@end

BaseViewController.h

#import <Cocoa/Cocoa.h>

@class NSNavigationController;

@interface BaseViewController : NSViewController
@property (nonatomic, weak) NSNavigationController *navigationController;
@end

BaseViewController.m

#import "BaseViewController.h"

@interface BaseViewController ()

@end

@implementation BaseViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Initialization code here.
    }
    return self;
}

@end

这是最简单的 NavigationController。我没有实现视图动画。希望它可以提供帮助。