objective-c - UIButton触摸后保持计数器增加

我创建了一组自定义类型的对象。所有对象的方法showDeleteButton具有hideDeleteButton。
我发现当我隐藏删除按钮（删除它）时，按下的按钮具有retainCounter == 2。

这里的代码：

-(void)showDeleteButton {
if(!isDeleteButtonLoaded) { // Check that method was't triggered twice
    UIButton *aDeleteButton = [[UIButton alloc] initWithFrame:CGRectMake(-3, -7, 30, 29)]; // RC == 1
    [aDeleteButton setImage:[UIImage imageNamed:@"close_button.png"] forState:UIControlStateNormal];
    [self addSubview:aDeleteButton]; // RC == 2
    [aDeleteButton addTarget:self action:@selector(deleteButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
    deleteButton = aDeleteButton;
    [aDeleteButton release]; // RC == 1
    isDeleteButtonLoaded = YES;
    NSLog(@"delete button retain count (created): %d", [deleteButton retainCount]);
    [self setNeedsDisplay];
}

}

-(void)deleteButtonPressed:(id)sender {
[delegate deleteImageAtPath:self.imageFullPath];

}

-(void)hideDeleteButton {
if(isDeleteButtonLoaded) {
    NSLog(@"delete button retain count (before): %d", [deleteButton retainCount]); // RC == 1
    [deleteButton removeFromSuperview]; // RC == 0
    deleteButton = nil;
    isDeleteButtonLoaded = NO;
    [self setNeedsDisplay];
}

}

因此，在第二种方法中，对于按下的按钮NSLog，显示RC == 2！有任何想法吗？我100％肯定不能从类外部访问deleteButton。

最佳答案

请勿留存

hem

对于任何理智的人而言，retainCount毫无意义，只要您遵循内存规则，一切都会正常进行。

关于objective-c - UIButton触摸后保持计数器增加，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/6347394/