iOS - 折叠动画UISlider

我想创建一个折叠动画UISlider。基本上，滑块将缩略图的大小，直到它被触摸，在哪个点它会扩展到正在改变的全尺寸。值更改后，滑块松开后，滑块将折回原始大小（缩略图大小）。iOS - 折叠动画UISlider

我试着与touchesBegan和touchesEnd一起工作，但这并没有让我走得很远。

到目前为止，我已经对UISlider进行了分类，并覆盖了beginTrackingWithTouch和endTrackingWithTouch。这种代码实现了折叠效果（当然没有动画），但滑块不再改变。任何想法如何最好地做到这一点？

#import "CollapsingUISlider.h" 

@implementation CollapsingUISlider 


/*-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { 
//self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, self.frame.size.width  * 4.0f, self.frame.size.height); 
[super touchesBegan:touches withEvent:event]; 
} 
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { 
// self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, self.frame.size.width * 0.25f, self.frame.size.height); 
[super touchesEnded:touches withEvent:event]; 
}*/ 
-(BOOL)beginTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event { 
     self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, 400, self.frame.size.height); 
     return YES; 
} 
-(void)endTrackingWithTouch:(UITouch*)touch withEvent:(UIEvent *)event { 
    self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, 20, self.frame.size.height); 
} 
-(BOOL) continueTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event { 
    self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, 400, self.frame.size.height); 
    return self.tracking; 
} 
@end

来源

2013-06-18 kilakev

问题是，当你开始触摸，你已经开始与控制，这意味着它可以跟踪价值变动交互。如果您同时调整控件的大小，您可以看到这不是一个好主意。也可能以奇怪的方式行事。 – Daniel

返回值（特别是'self.tracking'）可能是一个问题。我认为你可以通过改变一个子视图框架来实现更简单，更安全，否则布局将会被破坏。 –

最后我做这样的事情：

UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)]; 
[panRecognizer setMinimumNumberOfTouches:1]; 
[panRecognizer setMaximumNumberOfTouches:1]; 
[platformView addGestureRecognizer:panRecognizer]; 

-(void)move:(id)sender { 
[self.view bringSubviewToFront:[(UIPanGestureRecognizer*)sender view]]; 
CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:self.view]; 

if ([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateBegan) { 
    firstX = [[sender view] center].x; 
    firstY = [[sender view] center].y; 
} 

translatedPoint = CGPointMake(firstX, firstY+translatedPoint.y); 
[[sender view] setCenter:translatedPoint]; 
if (platformView.center.y < platformCenter.y - offset) { 
    platformView.center = CGPointMake(platformCenter.x,platformCenter.y-offset); 
    ((UIPanGestureRecognizer*)sender).enabled = NO; 
} else if (platformView.center.y > platformCenter.y) { 
    platformView.center = CGPointMake(platformCenter.x,platformCenter.y); 
    ((UIPanGestureRecognizer*)sender).enabled = NO; 
} 
}

来源

2013-07-02 17:27:36 kilakev

iOS - 折叠动画UISlider

回答

相关问题