Question

我正试图在屏幕上移动UIView。我正在使用UIPanGesture，以便视图在屏幕上跟随我的手指。我还计算了各种各样的东西，以确定手势的速度，并在此基础上我以该速度动画UIView。

这很有效 - 但它需要触及我想移动的实际UIView。我希望通过触摸主视图并执行仅移动UIView而不是所有视图的手势来获得相同的效果。

以下是移动UIView的代码

-(void)dragging:(UIPanGestureRecognizer *)gesture{

if(gesture.state == UIGestureRecognizerStateBegan)
    {

    self.panCoord = [gesture locationInView:gesture.view];


    }

CGPoint newCoord = [gesture locationInView:gesture.view];
float dX = newCoord.x-self.panCoord.x;


gesture.view.frame = CGRectMake(gesture.view.frame.origin.x+dX, gesture.view.frame.origin.y, gesture.view.frame.size.width, gesture.view.frame.size.height);


if (gesture.state == UIGestureRecognizerStateEnded){

    methodEnd = [NSDate date];
    NSTimeInterval executionTime = [methodEnd timeIntervalSinceDate:methodStart];


    double time = executionTime;

    float distance = start - end;


    int distanceOverTime = distance / time;
    float veloticty = distanceOverTime / 100;

    double miniTimeToUse = 0.5;
    double newMinTime;
    if (time < miniTimeToUse){

        newMinTime =  miniTimeToUse;
    }else {
        newMinTime = time;
    }

    NSLog (@"Distance: %f", distance);
    NSLog (@"X:%f", gesture.view.frame.origin.x+dX);


    if (gesture.view.frame.origin.x+dX >= 90 && distance >= 3){

        [UIView animateWithDuration:newMinTime
                              delay:0
             usingSpringWithDamping:0.9
              initialSpringVelocity:veloticty
                            options:0
                         animations:^{

                             self.filterView.frame = CGRectMake(300, 0, 300, 500);

                         } completion:nil];

    }
    if (gesture.view.frame.origin.x+dX <= 181 ){

    [UIView animateWithDuration:newMinTime
    delay:0
    usingSpringWithDamping:0.9
    initialSpringVelocity:veloticty
    options:0
    animations:^{

        self.filterView.frame = CGRectMake(30, 0, 300, 500);

    } completion:nil];


    }
}

}

如果我将UIPangesture添加到self.filteredView中 - 它可以正常工作。如果我将它添加到self.view - 屏幕上的所有内容都会移动。

我在哪里错了？

Answer 1

您是否尝试过此方法，只应为可移动视图设置UIPanGestureRecognizer。

-(void)moveView:(UILongPressGestureRecognizer *)recognizer
{
    CGPoint translation = [recognizer locationInView:recognizer.view.superview];

    recognizer.view.center = translation;
}

谢谢！

Answer 2

如果手势附加到self.view

，则以下代码行将移动self.view

gesture.view.frame = CGRectMake(gesture.view.frame.origin.x+dX, gesture.view.frame.origin.y, gesture.view.frame.size.width, gesture.view.frame.size.height);

您可能希望在那里使用self.filteredView。

UIPanGesture移动所有视图

2 个答案: