最近在實現用cocos2d-x實現拍照的功能，在網上找了很多關於object-c和c++混編的資料，也找到如何呼叫攝像頭的方法，但是總是不能實現，於是糾結一天也沒有結果，今天找到了一篇cocos2d-x呼叫game center，覺得都是ios api，應該能找到靈感，於是按照這個思路去做，果然是實現了。先附上程式碼，其中還有很多不明白的地方。

首先mo建了兩個類，一個是c++的，一個是object-c的

Object-C我們需要建一個UIViewController類，因為我們要在裡面呼叫<UIImagePickerControllerDelegate,UINavigationControllerDelegate>這兩個委託

takePhoto.h

#import <UIKit/UIKit.h>

@interface takePhoto : UIViewController<UIImagePickerControllerDelegate,UINavigationControllerDelegate>
-(void)snapImage:(id)sender;
-(NSString *)findUniqueSavePath;
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info;
@end
 

takePhoto.m

- (void)viewDidLoad
{
    [super viewDidLoad];
        // Do any additional setup after loading the view.
    UIWindow * window = [[UIApplication sharedApplication]keyWindow];
    [window addSubview:self.view];
    UIButton * take = [UIButton buttonWithType:UIButtonTypeCustom];
    [take setBackgroundColor:[UIColor whiteColor]];
    [take addTarget:self action:@selector(snapImage:) forControlEvents:UIControlEventTouchUpInside];
    [take setFrame:CGRectMake(20, 20, 50, 50)];
    [self.view addSubview:take];
    NSLog(@"I‘m here");
}

-(void)snapImage:(id)sender{
    UIImagePickerController * ipc = [[UIImagePickerController alloc]init];
    ipc.sourceType = UIImagePickerControllerSourceTypeCamera;
    ipc.delegate = self;
    ipc.wantsFullScreenLayout=YES;
    ipc.allowsImageEditing=NO;
    [self presentModalViewController:ipc animated:YES];
}
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    UIImage * image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
    [self dismissModalViewControllerAnimated:YES];
    [picker release];
    UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);//儲存到預設相簿
}
 

cocos2d-x部分程式碼:

scene_photo.h

#ifndef __Test__scene_photo__
#define __Test__scene_photo__

#include "cocos2d.h"
using namespace cocos2d;
class scene_photo:public CCLayer{
public:
    static CCScene * scene();
    scene_photo();

};

#endif /* defined(__Test__scene_photo__) */

#include "scene_photo.h"
#include "takePhoto.h"


using namespace cocos2d;


CCScene * scene_photo::scene()
{
    CCScene * scene = CCScene::node();
    CCLayer * layer = new scene_photo;
    scene->addChild(layer);
    layer->release();
    return scene;
}


scene_photo::scene_photo()
{
    takePhoto * photo = [[takePhoto alloc]init];
    [photo viewDidLoad];//要手動新增，否則無法顯示按鈕
}

這一步是需要將.cpp檔案改成.mm這樣才能呼叫object-c檔案

我是在HelloWorldScene.cpp裡新增一個menuItem,來跳轉到scene_photo場景中的，這裡就省略了。

這裡還有很重要的一步，就是將AppDelegat.cpp檔名改成AppDelegate.mm檔案，否則xcode會報錯。





作為初學者，對於ios中很多類都不是非常理解，還需要多學習啊，以此勵志，哈哈。