Cocos2d v3.x 在 Android 上通过 Apportable 支持后退按钮

Question

如Apportable Doc 中所述，我创建了一个名为AndroidButtonManager 的UIResponder 子类，以在我当前的cocos2d-iPhone v3.1 项目中支持硬件按钮点击事件（返回、主页按钮点击）。下面是接口和实现文件的代码

AndroidButtonManager.h

#import <Foundation/Foundation.h>
#import "cocos2d.h"

@interface AndroidButtonManager :UIResponder<UIApplicationDelegate>{

}
+(instancetype) sharedManager;
@end

和AndroidButtonManager.m

#import "AndroidButtonManager.h"


@implementation AndroidButtonManager
+(instancetype)sharedManager
{
    static AndroidButtonManager* sharedManager;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sharedManager = [[self alloc]init];
    });
    return sharedManager;
}
-(instancetype)init{
    if (self = [super init]) {
        [self canBecomeFirstResponder];
    }

    return self;
}

#ifdef ANDROID
// ----------------------------------------------------------------
//          OVER RIDING PARENT CLASS METHOD
// ----------------------------------------------------------------
-(BOOL)canBecomeFirstResponder
{
    [[AlertManager sharedManager] showAlertWithHeading:@"canBecomeFirstResponder" andMessage:@"AndroidButtonManager"];
    return YES;
}

- (void)buttonUpWithEvent:(UIEvent *)event
{
    [[AlertManager sharedManager] showAlertWithHeading:@"buttonUpWithEvent" andMessage:@""];
    switch (event.buttonCode)
    {
        case UIEventButtonCodeBack:
            [[AlertManager sharedManager] showAlertWithHeading:@"Back Button" andMessage:@"Home Button touched , going to transit to Menu Layer"];
            break;
        case UIEventButtonCodeMenu:{
            [[AlertManager sharedManager] showAlertWithHeading:@"Home Button" andMessage:@"Home Button touched , going to transit to Menu Layer"];
            break;
        }
        default:
            break;
    }
}

#endif
@end

我正在 AppDelegate 的 -(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions by

中创建共享管理器

#ifdef ANDROID
    [AndroidButtonManager sharedManager];
#endif

我收到来自[[AlertManager sharedManager] showAlertWithHeading:@"canBecomeFirstResponder" andMessage:@"AndroidButtonManager"]; 的警报，但来自[[AlertManager sharedManager] showAlertWithHeading:@"buttonUpWithEvent" andMessage:@""]; 的警报从未显示为- (void)buttonUpWithEvent:(UIEvent *)event 从未被调用。

我已尝试按照Apportable's Google Group 中的说明在AppDelegate.m 中实现此功能。两者都不起作用。 Cocos2d-v3.x中是否有实现Android中后退按钮支持的示例项目？

提前致谢。

Answer 1

哦，终于明白了。只需要创建一个CCDirector 类别，按钮处理代码将在其中执行。这是我CCDirector的分类名称CCDirector+ButtonManager的代码。

接口文件CCDirector+ButtonManager.h

#import "CCDirector.h"

@interface CCDirector (ButtonManager)
- (BOOL)canBecomeFirstResponder;
@end

实现文件CCDirector+ButtonManager.m

#import "CCDirector+ButtonManager.h"

@implementation CCDirector (ButtonManager)
#ifdef APPORTABLE
- (void)buttonUpWithEvent:(UIEvent *)event {
    switch (event.buttonCode)
    {
        case UIEventButtonCodeBack:
            // handle back button here
            [self showAlertWithHeading:@"buttonUpWithEvent" andMessage:@"BACK BUTTON"];
            break;
        case UIEventButtonCodeMenu:
            // show menu if possible.
            [self showAlertWithHeading:@"buttonUpWithEvent" andMessage:@"MENU BUTTON"];
            break;
        default:
            break;
    }
}

- (BOOL)canBecomeFirstResponder {
    [[AlertManager sharedManager] showAlertWithHeading:@"canBecomeFirstResponder" andMessage:@"CCDirector"];
    return YES;
}
#endif
-(void)showAlertWithHeading:(NSString*)alertHeading andMessage:(NSString*)alertMessage
{
    UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:alertHeading
                                                       message:alertMessage
                                                      delegate:self
                                             cancelButtonTitle:@"OK"
                                             otherButtonTitles: nil];
    [alertView show];
}
@end

并在AppDelegate的-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions by

中初始化它

#ifdef APPORTABLE
    [[CCDirector sharedDirector] becomeFirstResponder];
#endif