在垂直滚动上创建IOS Parallax视图

时间:2014-11-28 13:14:24

标签: ios uiview scroll parallax

我想知道你是否可以帮助我在IOS中做这样的动画,我想我需要使用Offset来渲染滚动天气,并且可能使用相同的Offset来改变4个视图的高度......可能你帮我这个吗?

屏幕截图:

Click Here

这是我到目前为止所做的...... :(同时我制作了我的天气对象)

CalculSize帮助我将屏幕划分为4个区域,以便知道如果手指位置在区域1中,它应该显示第一个视图

-(void) calculSize{
   //Calcul of the size of each WeatherView (different for each phone)
   CGRect screenRect = [[UIScreen mainScreen] bounds];
   CGFloat screenHeight = screenRect.size.height;

   // - 67 is the height of my top menu
   _maxSize1 = (screenHeight - 67) / 4;
   NSLog(@"%f", _maxSize1);
   NSLog(@"%f", screenHeight);
}

然后我使用touchesMoved获取手指在屏幕上移动时的Y位置

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
   //returns Y position
   UITouch *touch = [[event allTouches] anyObject];
   CGPoint location = [touch locationInView:touch.view];
   NSLog(@"Y: %f",location.y);

   //tells me if i'm in the first part etc.
   if (location.y > _maxSize1) {
       _part1 = YES;
       NSLog(@"%d", _part1);
   }
   else if (location.y < _maxSize1){
       _part1 = NO;
       NSLog(@"%d", _part1);
   }

   [NSObject cancelPreviousPerformRequestsWithTarget:self selector:nil object:nil];
}

1 个答案:

答案 0 :(得分:1)

您能告诉我们您已经做了什么吗?

一种简单的方法是制作您的自定义&#34; WeatherView&#34;在其中实现方法

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

捕捉用户互动并启动基本动画,如

[UIView animateWithDuration:ANIM_DURATION animations:^{
    self.center = CGPointMake(self.center.x, self.center.y + yMove);
}
                 completion:^(BOOL finished) {
                     NSLog(@"anim is finished");
                     [self showLabel:moveToTop];
                     isAnimating = NO;
                 }];

在动画结束时,我启动第二个显示UILabel。

最重要的是,您需要一个viewController来管理这些自定义视图,例如使用自定义协议。

如果您希望执行拖动,可以通过在自定义视图上添加平移手势识别器来处理它:

UIPanGestureRecognizer* gest = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];

然后拖动视图:

- (void)handlePan:(UIPanGestureRecognizer *)recognizer {

CGPoint translation = [recognizer translationInView:self];
self.center = CGPointMake(self.center.x,
                          self.center.y + translation.y);
[recognizer setTranslation:CGPointMake(0, 0) inView:self];
}
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