ios - 在同一个 UIImageView 中删除和添加多个图像

Question

我正在设计一个自己制作的披萨应用程序。用户可以添加多种配料，例如虾、培根等。所以添加图像工作正常。这是我的代码:

bool meatAdded;
- (void)addMeatTopping:(NSString*)meat  withImage:(UIImageView*)meatImage {
    if ((meatAdded =! meatAdded)) {
        //crust o taqir bede be cheese BADAN
        meatImage = [[UIImageView alloc]initWithFrame:_crustImage.bounds];
        [meatImage setImage:[UIImage imageNamed:meat]];
        [_crustImage addSubview:meatImage];

        for (UIButton*button in _meatButtonsArray) {
            checkMark.center = button.center;
            checkMark.alpha = 1;
        }

        [UIView animateWithDuration:.60 delay:0 usingSpringWithDamping:.40 initialSpringVelocity:.20 options:UIViewAnimationOptionAllowUserInteraction animations:^ {
            meatImage.transform = CGAffineTransformMakeScale(.5, .5);
            meatImage.transform = CGAffineTransformMakeScale(1, 1);             } completion:nil];
    }else {
        /**** THIS PART OF CODE DOESN'T WORK ! IT PRINTS LOG BUT DOESN'T CHANGE THE MEAT IMAGE AT ALL ****/

        NSLog(@"Remove");
        meatImage.alpha = 0;
        [meatImage setImage:nil];
        [meatImage removeFromSuperview];
    }
}

调用上述方法的示例:

- (IBAction)meat0:(id)sender {
    [self addMeatTopping:@"topping_Bacon" withImage:beykenMeat];
}

- (IBAction)meat1:(id)sender {
   [self addMeatTopping:@"Steak" withImage:steykMeat];
}

当用户选择一个项目时，如何创建切换方法？该项目将添加到 View 中，再次点击时它应该从 View 中删除。

Answer 1

SubclassImageView *imageviewG = [[SubclassImageView alloc]initWithFrame:CGRectMake(0, 0, 200, 200)];
self.crustImage = [[UIView alloc]initWithFrame:CGRectMake(50, 50, 250, 250)];
self.crustImage.backgroundColor = [UIColor redColor];
[imageviewG setImage:@"topping_Bacon"];

[self.crustImage addSubview:imageviewG];
[self.view addSubview:self.crustImage];

    for(id viewInner in self.crustImage.subviews){
    if([viewInner isKindOfClass:[SubclassImageView class]]){
        SubclassImageView *imageSeleted = (SubclassImageView *)viewInner;
        if([imageSeleted.getImageName isEqualToString:@"topping_Bacon"]){
        //your logic to add or remove the imageview from super view
        }else if([imageSeleted.getImageName isEqualToString:@"Steak"]){
        //your logic to add or remove the imageview from super view
        }
    }
}