从子视图中删除所有UIButton

Question

我以编程方式在我的视图中添加了几个UIButtons.单击其中一个按钮后,它们都应该是"removeFromSuperView"或已发布,而不仅仅是一个.

for (int p=0; p<[array count]; p++) {  
    button = [[UIButton alloc] initWithFrame:CGRectMake(100,100,44,44)];  
    button.tag = p;  
    [button setBackgroundImage:[UIImage imageNamed:@"image.png"]   forState:UIControlStateNormal];    
    [self.view addSubview:button];    
    [button addTarget:self action:@selector(action:)   forControlEvents:UIControlEventTouchUpInside];  
}

现在这是应该删除所有按钮的部分.不只是一个.

-(void) action:(id)sender{  
    UIButton *button = (UIButton *)sender;  
    int pressed = button.tag;  
    [button removeFromSuperview];  
}

我希望有人可以帮我这个!

Answer 1

一种更有效的方法是在创建数组时将每个按钮添加到数组中,然后当按下按钮时,让数组中的所有按钮调用-removeFromSuperView方法如下:

[arrayOfButtons makeObjectsPerformSelector:@selector(removeFromSuperView)];

然后,您可以将按钮保留在数组中并重复使用,或者调用removeAllObjects以释放它们.然后你可以稍后再开始填充它.

这使您无需遍历整个视图层次结构来查找按钮.

Answer 2

另一个答案仅供参考:

for (int i = [self.view.subviews count] -1; i>=0; i--) {
    if ([[self.view.subviews objectAtIndex:i] isKindOfClass:[UIButton class]]) {
        [[self.view.subviews objectAtIndex:i] removeFromSuperview];
    }
}

Answer 3

NSMutableArray *buttonsToRemove = [NSMutableArray array];
for (UIView *subview in self.view.subviews) {
    if ([subview isKindOfClass:[UIButton class]]) {
        [buttonsToRemove addObject:subview];
    }
}
[buttonsToRemove makeObjectsPerformSelector:@selector(removeFromSuperview)];

编辑：
我已将我的答案编辑为更好的解决方案。
现在，在枚举数组时，对象不会从数组中删除......