我想从主视图控制器的右侧创建一个滑出菜单。但是我希望滑出菜单显示在主视图的顶部而不是将其推到一侧。
我看过ECSlidingViewController 2，它允许从任何一侧滑出，但是滑出的菜单在暴露的边缘上显得切断。它创建顶视图控制器向左或向右移动的效果，以显示其下的隐藏菜单。我想让它看起来滑出的隐藏菜单进入主视图控制器，我们可以看到它的左边缘，所以没有内容被切断。
这是否可能，ECSlidingViewController 2是否适用于此？
修改
这就是我的尝试：
检测触摸开始：
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
BBAppDelegate *myAppDelegate = (BBAppDelegate*)[UIApplication sharedApplication].delegate;
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchLocation = [touch locationInView:self.view];
NSArray *myViewArray = [[NSBundle mainBundle] loadNibNamed:@"FilterView" owner:self options:nil];
self.filterView = myViewArray[0];
[myAppDelegate.window addSubview:self.filterView];
if (CGRectContainsPoint(self.filterView.frame, touchLocation)) {
dragging = YES;
oldX = touchLocation.x;
oldY = touchLocation.y;
}
}
然后拖动：
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchLocation = [touch locationInView:self.view];
if (dragging) {
CGRect frame = self.filterView.frame;
frame.origin.x = self.filterView.frame.origin.x + touchLocation.x;
frame.origin.y = self.filterView.frame.origin.y + touchLocation.y;
self.filterView.frame = frame;
}
}
但是，当我开始触摸时，filterView会替换所有视图，并且无论如何都不会滑动或动画。我虽然这是因为没有提供一个起点 - 所以我设置了self.filterView就像这样：
self.filterView = [[UIView alloc] initWithFrame：CGRectMake（0,0,120,564）];
但是，在显示视图时，更改这些值对视图的位置/大小没有影响。
修改2
好的，我开始了一个新项目进行测试，并设法通过跟踪我的屏幕上的视图来移动。
我正在使用UIPanGestureRecognizer
像这样：
viewDidLoad
- (void)viewDidLoad
{ [super viewDidLoad];
NSArray *myViewArray = [[NSBundle mainBundle] loadNibNamed:@"View" owner:self options:nil];
UIView *myView = myViewArray[0];
self.filterView = myView;
self.filterView.frame = CGRectMake(100, 100, 200, 200);
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self
action:@selector(dragging:)];
pan.delegate = self;
[self.filterView addGestureRecognizer:pan];
[self.view addSubview:self.filterView];
}
然后在拖动方法中：
-(void)dragging:(UIPanGestureRecognizer *)gesture
{
if(gesture.state == UIGestureRecognizerStateBegan)
{
NSLog(@"Received a pan gesture");
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);
}
这允许视图仅水平移动。
几乎就在那里 - 我现在要弄清楚的是当用户抬起手指时它会抓住一个位置。以及如何在其开始位置偏离屏幕时移动此视图。
编辑3
好的，所以我想控制出现在屏幕上的视图的速度和速度。如果用户快速滑动，则视图以他们滑动的速度到达。如果他们慢慢滑动，它会缓慢地进入。但是我也设置了最低时间 - 所以如果他们需要很长时间 - 它默认为最小量。
以下是代码：
{
float start;
float end;
NSDate *methodStart;
NSDate *methodEnd;
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
methodStart = [NSDate date];
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInView:touch.view];
start = location.x;}
-(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;
}
if (gesture.view.frame.origin.x+dX >= 180){
[UIView animateWithDuration:newMinTime
delay:0
usingSpringWithDamping:0.9
initialSpringVelocity:veloticty
options:0
animations:^{
self.filterView.frame = CGRectMake(300, 100, 200, 200);
} 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(50, 100, 200, 200);
} completion:nil];
}
}
}
现在只是为了让它从侧面拉出视图。