Question

当我只添加一个MenuItem时，它工作正常。但是当我去另外两个MenuItem时，它会因异常'NSInvalidArgumentException'而崩溃，原因是：'+ [NSInvocation invocationWithMethodSignature：]：方法签名参数不能为nil'

我正在做什么



    CCMenuItem *startGame = [CCMenuItemImage itemFromNormalImage:@"start-game.png" selectedImage:@"start-game.png" target:self selector:@selector(startGame:)];


    CCMenuItem *settings = [CCMenuItemImage itemFromNormalImage:@"settings.png" selectedImage:@"settings.png" target:self selector:@selector(settings:)];


    CCMenuItemImage *gameCentre = [CCMenuItemImage itemFromNormalImage:@"game-centre.png" selectedImage:@"game-centre.png" target:self selector:@selector(gameCentre:)];


    CCMenu *menu = [CCMenu menuWithItems:startGame, settings, gameCentre, nil];
    [menu alignItemsVerticallyWithPadding:10];
    [self addChild:menu z:1];

CCMenuItem *startGame = [CCMenuItemImage itemFromNormalImage:@"start-game.png" selectedImage:@"start-game.png" target:self selector:@selector(startGame:)]; CCMenuItem *settings = [CCMenuItemImage itemFromNormalImage:@"settings.png" selectedImage:@"settings.png" target:self selector:@selector(settings:)]; CCMenuItemImage *gameCentre = [CCMenuItemImage itemFromNormalImage:@"game-centre.png" selectedImage:@"game-centre.png" target:self selector:@selector(gameCentre:)]; CCMenu *menu = [CCMenu menuWithItems:startGame, settings, gameCentre, nil]; [menu alignItemsVerticallyWithPadding:10]; [self addChild:menu z:1];

这是我的选择器功能

-(void)startGame:(id)sender
 {
     NSLog(@"start game");
 }
-(void)setttings:(id)sender
 {
     NSLog(@"settings");
 }
-(void)gameCentre:(id)sender
 {
     NSLog(@"game centre");
 }

提前填写任何帮助

Answer 1

您的选择器功能（startGame，settings，gameCentre）似乎写得不正确。

Answer 2

因为您的选择器以“：”结尾，即@selector（gameCentre :)，请确保您班级中的方法实际上采用参数

- (void)startGame:(id)sender
{
    // do whatever you want here
}

- (void)settings:(id)sender
{
    // do whatever you want here
}

- (void)gameCentre:(id)sender
{
    // do whatever you want here
}

Answer 3

您的选择器可能没有采用任何参数，而您提到“@selector(startGame:)”就好像他们正在使用参数一样。如果他们不接受任何参数，它可能像“@selector(startGame)”。你需要检查..

当我在cocos2d中添加多个MenuItem时，应用程序崩溃

3 个答案: