滑动护腕iOS

Question

我想创建一个滑动"视图"。我希望能够把它从页面底部拉出来。我正在寻找的最接近的例子是倒数第二个护腕。我希望能够根据需要上下滑动此视图的位置。有人有什么好办法吗？我四处寻找例子，但从未见过这样的情况。

Answer 1

我认为您可以使用UIPanGestureRecognizer：

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget: self action: @selector(panGestureRecognized:)];
    [panRecognizer setDelegate:self];
    [panRecognizer setCancelsTouchesInView: YES];
    [panRecognizer setMinimumNumberOfTouches:1];
    [panRecognizer setMaximumNumberOfTouches:1];
    [self.handleImage addGestureRecognizer: panRecognizer];

    firstX = [self.handleImage center].x;
    firstY = [self.handleImage center].y;
}

-(void)panGestureRecognized:(id)sender {
    [self.view bringSubviewToFront:[(UIPanGestureRecognizer*)sender view]];
    CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:self.view];
    UIPanGestureRecognizer* panRecognizer = (UIPanGestureRecognizer*)sender;
    if ([panRecognizer state] == UIGestureRecognizerStateBegan) {
        firstX = [[panRecognizer view] center].x;
        firstY = [[panRecognizer view] center].y;
    }
    int nextPosition = firstY+translatedPoint.y;
    if(nextPosition > MIN_Y && nextPosition < MAX_Y){
        CGPoint certainPositin = CGPointMake([self.curtainView center].x,-(self.curtainView.frame.size.height)  + (nextPosition - 17));
        translatedPoint = CGPointMake(firstX,nextPosition);
        [[panRecognizer view] setCenter:translatedPoint];
        [self.curtainView setCenter:certainPositin];
    }

    if ([panRecognizer state] == UIGestureRecognizerStateEnded) {
        //Gesture ended
    }
}