Question

写作时

@implementation GameViewController

-(IBAction)StartGame:(id)sender{

    StartGame.hidden = YES;

    BirdMovement = [NSTimer scheduledTimerWithTimeInterval:0.05
    target:self selector:@selector(BirdMoving) userInfo:nil repeats:YES];

}

-(void)BirdMoving{

    Bird.center = CGPointMake(Bird.center.x, Bird.center.y - BirdFlight);

    BirdFlight = BirdFlight - 5;

    if (BirdFlight < -15) {
        BirdFlight = -15;

        if (BirdFlight > 0) {
            Bird.image = [UIImage imageNamed:@"3.png"];

        }

        if (BirdFlight < 0) {
            Bird.image = [UIImage imageNamed:@"4.png"];
        }

}


-(void)touchesBegan:(NSSet *)touches withEvent: (UIEvent *)event{

    BirdFlight =30;

}

它说我使用未声明的标识符touchesBegan: 请帮帮我:)。

Answer 1

您忘记了}方法中if (BirdFlight < -15)语句的右大括号（BirdMoving）。

在Xcode中，选择编辑＆gt;选择全部（或按⌘ A ）。然后选择编辑器＆gt; <结构>重新缩进（或按 control I ）。这将使问题变得明显。

touchesBegan代码出错

1 个答案: