第二次触摸动画

Question

尝试掌握 Xcode 并在过去几周似乎取得了一些进展。

有谁知道自定义按钮可以在第二次点击时执行一组不同的动画。

假设我有一个自定义按钮及其马里奥，当我点击它时，他从屏幕中间跑出屏幕右侧，然后从左侧跑回中间屏幕上，他也会发出声音。

我使用以下代码实现了这一点：

- (IBAction)marioRunning_clicked:(id)sender
{

    [UIView animateWithDuration:1.50 delay:0.0 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
        marioRunning.center = CGPointMake(350.5, 456.0);
    } completion:^(BOOL finished) {
        if (finished) {
            [UIView animateWithDuration:0.00 delay:0.0 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
                marioRunning.center = CGPointMake(-30.5, 456.0);
            } completion:^(BOOL finished) {
                if (finished) {
                    [UIView animateWithDuration:1.50 delay:0.0 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
                        marioRunning.center = CGPointMake(160.0, 456.0);
                    } completion:^(BOOL finished) {
                        if(finished)  // NSLog ( @"Finished !!!!!" );
                        marioRunning.center = CGPointMake(160.0, 456.0);
                    }];
                }
            }];
        }
    }];

    marioRunning.imageView.animationImages = [NSArray arrayWithObjects:[UIImage imageNamed:@"mario-running2"],[UIImage imageNamed:@"mario-running3"],nil];

    marioRunning.imageView.animationDuration = 0.15;
    marioRunning.imageView.animationRepeatCount = 19;

    [marioRunning.imageView startAnimating];
}

我怎样才能让他在下次点击时制作第二组动画？例如，如果我第二次点击他，而不是从左到右运行，他会上下跳跃？

Answer 1

使用按钮的选中状态来决定执行哪个动画

-(void)buttonClicked:(UIButton*)button
{
     if(button.selected)
     {
          [self doAnimation1];
     }
     else
     {
          [self doAnimation2];
     }

     button.selected = !button.selected;
}

Answer 2

这可能有点矫枉过正，但这是一种很酷的方式来做你想做的事：

创建UIButton 的子类，我们称之为DDDMarioButton：

typedef void (^DDDAnimationBlock)(UIButton *button);

@interface DDDMarioButton : UIButton

- (void)addAnimationBlockToQueue:(DDDAnimationBlock)block;

@end

然后在DDDMarioButton.m:

@interface DDDMarioButton ()

@property (nonatomic, strong) NSMutableArray *animationQueue;

@end

@implementation DDDMarioButton

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
    }
    return self;
}

- (void)buttonPressed:(id)button
{
    DDDAnimationBlock block = self.animationQueue[0];
    block(self);
    [self.animationQueue removeObjectAtIndex:0];
}

- (void)addAnimationBlockToQueue:(DDDAnimationBlock)block
{
    if(!self.animationQueue)
    {
        self.animationQueue = [NSMutableArray new];
    }

    [self.animationQueue addObject:block];
}

@end

然后，无论您在哪里创建按钮，都可以一步一步添加：

DDDMarioButton *button = [[DDDMarioButton alloc] initWithFrame:CGRectZero];

[button addAnimationBlockToQueue:^(UIButton *button) {
   // perform some animation
}];

[button addAnimationBlockToQueue:^(UIButton *button) {
    // perform another animation
}];

应该这样做。我还没有测试过这个，你可能需要一些配置，但这差不多就是这个想法。