游戏控制器介绍及代码集成

在iOS7中，苹果加强了对游戏开发的支持，其中一个功能就是增加了Game Controller Framework （GameController.framework）可以让你在程序中发现游戏控制器硬件并进行配置。通过Game Controller Framework可以通过无线或者蓝牙连接iOS设备。当控制器可用的时候，该Framework会通知应用程序。

Game Controller Framework 支持三种类型的控制器

• 标准的控制器：该控制器具有一个方向键，一个暂停按钮，四个按钮和两个肩部按钮。

• 扩展的控制器：该控制器跟标准控制器类似，但它可以有两个杆和四个肩部按钮。

• 扩展无线控制器：跟上面的控制器类似，但它以无线方式工作，不需要将IOS设备放置到控制器里面。

[img]/upload/attachment/0097/4664/f9537287-cacf-36f2-a48a-687a2182cd2e.png[/img]

软件环境：ios7 + xcode5

操作系统：OSX 10.8.4

实现过程：

1:将游戏控制器的Connet和Disconnet状态进行事件注册

- (void)configureGameControllers {

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(gameControllerDidConnect:) name:GCControllerDidConnectNotification object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(gameControllerDidDisconnect:) name:GCControllerDidDisconnectNotification object:nil];

[GCController startWirelessControllerDiscoveryWithCompletionHandler:^{

// we don't use any code here since when new controllers are found we will get notifications

}];

}

实现相应注册事件的代码

- (void)gameControllerDidConnect:(NSNotification *)notification {

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Warning"

message:@"Game controller connected. Do you want to use it?"

delegate:self

cancelButtonTitle:@"No"

otherButtonTitles:@"Yes", nil];

[alert show];

}

- (void)gameControllerDidDisconnect:(NSNotification *)notification {

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Warning"

message:@"Game controller has disconnected."

delegate:nil

cancelButtonTitle:@"Ok"

otherButtonTitles:nil, nil];

[alert show];

}

2：遍历所有的控制器，并对其按键进行注册

- (void)configureConnectedGameControllers {

for (GCController *controller in [GCController controllers]) {

[self setupController:controller ];

}

}

- (void)setupController:(GCController *)controller

{

/** 对X,Y,A,B键位进行注册

**/

GCControllerButtonValueChangedHandler XYABButtonHandler = ^(GCControllerButtonInput *button, float value, BOOL pressed) {

};

if (controller.gamepad) {

controller.gamepad.buttonA.valueChangedHandler = XYABButtonHandler;

controller.gamepad.buttonB.valueChangedHandler = XYABButtonHandler;

controller.gamepad.buttonX.valueChangedHandler = XYABButtonHandler;

controller.gamepad.buttonY.valueChangedHandler = XYABButtonHandler;

}

if (controller.extendedGamepad) {

controller.extendedGamepad.buttonA.valueChangedHandler = XYABButtonHandler;

controller.extendedGamepad.buttonB.valueChangedHandler = XYABButtonHandler;

controller.extendedGamepad.buttonX.valueChangedHandler = XYABButtonHandler;

controller.extendedGamepad.buttonY.valueChangedHandler = XYABButtonHandler;

}

/** 对肩部的键位进行注册

**/

GCControllerButtonValueChangedHandler LRShoulderHandler = ^(GCControllerButtonInput *button, float value, BOOL pressed) {

};

if (controller.gamepad) {

controller.gamepad.leftShoulder.valueChangedHandler = LRShoulderHandler;

controller.gamepad.rightShoulder.valueChangedHandler = LRShoulderHandler;

}

if (controller.extendedGamepad) {

controller.extendedGamepad.leftShoulder.valueChangedHandler = LRShoulderHandler;

controller.extendedGamepad.rightShoulder.valueChangedHandler = LRShoulderHandler;

}

/**对方向键进行注册

**/

GCControllerDirectionPadValueChangedHandler LRThumbHandler = ^(GCControllerDirectionPad *dpad, float xValue, float yValue) {

};

if (controller.extendedGamepad) {

controller.extendedGamepad.leftThumbstick.valueChangedHandler = LRThumbHandler;

controller.extendedGamepad.rightThumbstick.valueChangedHandler = LRThumbHandler;

}

if (controller.gamepad.dpad) {

controller.gamepad.dpad.valueChangedHandler = dpadMoveHandler;

}

}

参考：《iOS 7 Game Development》