iOS项目嵌入Unity3D

一、需求

• 在iOS App中加入Unity3D元素，App通过用Unity提供的KPI实现功能操作

二、Unity集成到iOS原生项目

1. Unity导出的工程，可以作为独立的App上线，也可以Framework的形式继承到原生项目中（通常公司项目有需求的话都有招一个开发Unity，当然自己去学，做一个简单的demo还是挺简单的，网上教程也有很多）
2. Unity的集成有多种方式，我这里项目是有使用cocospod，并且现在的项目基本都使用pod，我这里只写有关联pod
3. 操作如下图：（NativeiOS是iOS原生项目，UnityTest_Device是Unity导出的工程，真机调试）

4. 将UnityTest_Device工程直接拖到NativeiOS，项目结构目录如下：

5. 打开原生项目，添加Unity到工作区，如下操作：

• 原生项目结构

• 加入Untity，左下角“+”号 Files Add

• 选择Untiy-iPhone.xcodeproj

• 然后项目结构会变成如下图：

• 展开Unity-iPhone工程，选择Data文件夹，如图操作：

• 选择之后进行编译，得到Unity的frame

• 编译成功知道，展开iOS原生项目，选择target

• 加入frameword 之后已经完成了继承，接下来就是代码的实现

三、代码实现

• 1. main中实现

int main(int argc, char * argv[]) {

    NSString * appDelegateClassName;
    
    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
    [userDefaults setObject:@(argc) forKey:@"argc"];
    [userDefaults synchronize];
    
    [userDefaults setObject:[NSString stringWithFormat:@"%p",argv] forKey:@"argv"];
    [userDefaults synchronize];

    @autoreleasepool {
        // Setup code that might create autoreleased objects goes here.
        appDelegateClassName = NSStringFromClass([AppDelegate class]);
    }
    return UIApplicationMain(argc, argv, nil, appDelegateClassName);
}
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• 2. AppDelegate.h

#import <UIKit/UIKit.h>

#include <UnityFramework/UnityFramework.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (nonatomic, strong) UIWindow      *window;

@property (nonatomic, strong) UnityFramework *ufw;

///展示Unity的view
- (void)showUnityView;

///展示iOS原生的view
- (void)showNativeView;

@end
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3. AppDelegate.m

/// UnityFrameworkLoad
UIKIT_STATIC_INLINE UnityFramework* UnityFrameworkLoad()
{
    NSString* bundlePath = nil;
    bundlePath = [[NSBundle mainBundle] bundlePath];
    bundlePath = [bundlePath stringByAppendingString: @"/Frameworks/UnityFramework.framework"];
    NSBundle* bundle = [NSBundle bundleWithPath: bundlePath];

    if ([bundle isLoaded] == false) [bundle load];

    UnityFramework* ufw = [bundle.principalClass getInstance];

    if (![ufw appController]) {
        // unity is not initialized
        [ufw setExecuteHeader: &_mh_execute_header];
    }
    return ufw;
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    
    //初始化Unity
    [self initUnity];

    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
    [userDefaults setObject:launchOptions forKey:@"launchOptions"];
    [userDefaults synchronize];
    return YES;
}

#pragma mark - Unity
/// 判断Unity是否已经初始化
- (BOOL)unityIsInitialized {
    return [self ufw] && [[self ufw] appController];
}

/// 初始化Unity
- (void)initUnity {
    // 判断Unity 是否已经初始化
    if ([self unityIsInitialized]) return;

    // 初始化Unity
    self.ufw = UnityFrameworkLoad();
    [self.ufw setDataBundleId:"com.unity3d.framework"];
    [self.ufw registerFrameworkListener:self];
    
//  [NSClassFromString(@"FrameworkLibAPI") registerAPIforNativeCalls:self];

    NSString *argvStr = [[NSUserDefaults standardUserDefaults] valueForKey:@"argv"];
    char **argv;
    sscanf([argvStr cStringUsingEncoding:NSUTF8StringEncoding], "%p",&argv);
    int argc = [[[NSUserDefaults standardUserDefaults] valueForKey:@"argc"] intValue];
    NSDictionary *launchOptions = [[NSUserDefaults standardUserDefaults] valueForKey:@"launchOptions"];
    [self.ufw runEmbeddedWithArgc:argc argv:argv appLaunchOpts:launchOptions];
}

///展示Unity的view
- (void)showUnityView {
    if (![self unityIsInitialized]){
        NSLog(@"Unity 还未初始化");
    }

    [self.ufw showUnityWindow];
}

///展示iOS原生的view
- (void)showNativeView {
    [self.window makeKeyAndVisible];
}

#pragma mark - UnityFrameworkListener
- (void)unityDidUnload:(NSNotification *)notification {
    NSLog(@"========== %s ============",__func__);
    [self.window makeKeyAndVisible];
    [[self ufw] unregisterFrameworkListener: self];
    [self setUfw: nil];
}

- (void)unityDidQuit:(NSNotification *)notification {
    NSLog(@"========== %s ============",__func__);
}

- (void)applicationWillResignActive:(UIApplication *)application {
    [[[self ufw] appController] applicationWillResignActive: application];
}

- (void)applicationDidEnterBackground:(UIApplication *)application {
    [[[self ufw] appController] applicationDidEnterBackground: application];
}

- (void)applicationWillEnterForeground:(UIApplication *)application {
    [[[self ufw] appController] applicationWillEnterForeground: application];
}

- (void)applicationDidBecomeActive:(UIApplication *)application {
    [[[self ufw] appController] applicationDidBecomeActive: application];
}

- (void)applicationWillTerminate:(UIApplication *)application {
    [[[self ufw] appController] applicationWillTerminate: application];
}
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• 4. 在自定义xxxController中，根据需求创建Unity的view

1.导入头文件
#import "AppDelegate.h"

2.添加属性
/// unityContentView
@property (nonatomic, weak) UIView *unityContentView;

/// AppDelegate
@property (nonatomic, strong) AppDelegate *appDelegate;


- (void)awakeFromNib {
    [super awakeFromNib];

    AppDelegate *appDelegate = (AppDelegate *)([UIApplication sharedApplication].delegate);
    self.appDelegate = appDelegate;
    
    // Unity的view
    UIView *view = self.appDelegate.ufw.appController.rootViewController.view;
    view.frame = CGRectMake(0, 0, 300, 500);
    [self addSubview:view];
}

///简单的功能操作
/// 减速
- (IBAction)slowDownClick:(UIButton *)sender {
    [self.appDelegate.ufw sendMessageToGOWithName:"ybot" functionName:"slowDown" message:""];
}

/// 加速
- (IBAction)accelerateClick:(UIButton *)sender {
    [self.appDelegate.ufw sendMessageToGOWithName:"ybot" functionName:"speedUp" message:""];
}


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