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想要改进这个问题吗? 更新问题,使其只关注一个问题

enemyBlobArray = [[NSMutableArray alloc] init];

for(int i = 0; i < kEnemyCount; i++) {
    [enemyArray addObject:[SpriteHelpers setupAnimatedSprite:self.view numFrames:3 withFilePrefix:@"greenbox" withDuration:((CGFloat)(arc4random()%2)/3 + 0.5) ofType:@"png" withValue:0]];
}

enemyView = [enemyArray objectAtIndex:0];

I am trying to make objects appear on screen from this array. I get an error message saying that the object I add cannot be nil. I don t know why it s nil, though.

Answer 1

setup AnimatedSprite:numFrames: with FilePrefix: withthDuration:ofType:withType:withValue: is return Negy: is returned new. 方法中存在问题。由于我们没有该方法的代码,我无法告诉你它可能是什么。

Answer 2

根据提供的代码, 您没有提及“ 敌人阵列” 的分配和初始化; 但是, 您创建了一个名为“ 敌人布洛布阵列” 的可变阵列, 这个阵列在提供的代码中从未使用过。也许这是一个简单的错误拼写变量名称的问题。

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