xcode4 - Xcode4 上的 Sphero 构建失败

Question

我正在尝试为“ Sphero”创建一个用于 IOS 的应用程序，并且我想测试该HelloWorld示例，但是在创建一个新项目后，我单击了构建，但它失败了，我遇到了 4 个问题：

1）使用未声明的标识符' viewDidLoad'：

 -(void)viewDidLoad {

2) 在消息发送表达式开始时缺少"["这是在以下代码行中，xcode 想要将 [ 放在第二个“选择器”之前

 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appDidBecomeActive:) name:UIApplicationDidBecomeActiveNotification object:nil];

3）错误的接收器类型'SEL' （与上面相同的行）

4）预期的外部声明：

最后一个大括号出现错误。

-(void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
-(void)viewDidLoad {
    [super viewDidLoad];

    /*Register for application lifecycle notifications so we known when to connect and disconnect from the robot*/
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appDidBecomeActive:) name:UIApplicationDidBecomeActiveNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appWillResignActive:) name:UIApplicationWillResignActiveNotification object:nil];

    /*Only start the blinking loop when the view loads*/
    robotOnline = NO;

    calibrateHandler = [[RUICalibrateGestureHandler alloc] initWithView:self.view];
}

}

Answer 1

用这个替换你的代码。

-(void)viewDidLoad {
    [super viewDidLoad];

    /*Register for application lifecycle notifications so we known when to connect and disconnect from the robot*/
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appDidBecomeActive:) name:UIApplicationDidBecomeActiveNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appWillResignActive:) name:UIApplicationWillResignActiveNotification object:nil];

    /*Only start the blinking loop when the view loads*/
    robotOnline = NO;

    calibrateHandler = [[RUICalibrateGestureHandler alloc] initWithView:self.view];
}