这是长按tableview的头视图的手势方法，代码如下
UILongPressGestureRecognizer *longPress = (UILongPressGestureRecognizer *)sender;
//获得长按点在scrollview中的坐标
CGPoint location = [longPress locationInView:self];
//获取长按点在window中的坐标
CGPoint inWindow = [longPress locationInView:self.window];
// 拖拽headView的判断
CGPoint pointOfHeadView = CGPointMake(0, 0);
UIView *headview;
for (UIView *view in self.listHeaderArray) {
CGPoint point = [self convertPoint:location toView:view];
if ([view pointInside:point withEvent:nil]) {
pointOfHeadView = point;
headview = view;
}
}
static UIView *snapView;
static float offsetXoflistView;
static float offsetYoflistView;
static CADisplayLink *link;
static float rollBeginMaxX;
static float rollBeginMinX;
UIGestureRecognizerState state = longPress.state;
switch (state) {
case UIGestureRecognizerStateBegan:{
for (UIView *listview in self.arrlists) {
if (listview == headview.superview) {
_superOFHeadView = listview;
}
}
// 截图操作，截取点击所在的listView
snapView = [self customSnapshoFromView:_superOFHeadView];
snapView.alpha = 1.0;
// 转化坐标
__block CGPoint listViewCentreInWindow = [self convertPoint:_superOFHeadView.center toView:self.window];
NSLog(@"listView的window坐标：%f---%f",listViewCentreInWindow.x,listViewCentreInWindow.y);
//计算该点与手势在window上的偏移量
offsetXoflistView = listViewCentreInWindow.x - inWindow.x;
// offsetYoflistView = listViewCentreInWindow.y - inWindow.y;
snapView.center = listViewCentreInWindow;
//手指移动发生的动画
[self.window addSubview:snapView];
[UIView animateWithDuration:0.5 animations:^{
listViewCentreInWindow.y = inWindow.y;
NSLog(@"改变的listView的Y%f",listViewCentreInWindow.y);
NSLog(@"listView的中心点在window上的Y：%f",listViewCentreInWindow.y);
snapView.center = listViewCentreInWindow;
snapView.transform = CGAffineTransformMakeScale(1.0, 1.0);
snapView.layer.shadowColor = [UIColor blackColor].CGColor;
snapView.layer.shadowOpacity = 0.8f;
snapView.layer.shadowRadius = 4.f;
snapView.layer.shadowOffset = CGSizeMake(4,4);
_superOFHeadView.hidden = YES;
} completion:^(BOOL finished) {
}];
//判断截图横向滚动的边界
if (CGRectGetMaxX(snapView.frame)>ScreenWidth) {
rollBeginMaxX = CGRectGetMaxX(snapView.frame);
}else{
rollBeginMaxX = ScreenWidth;
}
if (CGRectGetMinX(snapView.frame)<0) {
rollBeginMinX = CGRectGetMinX(snapView.frame);
}else{
rollBeginMinX = 0;
}
}
break;
case UIGestureRecognizerStateChanged:{
// 跟随手指移动的截图 offsetXoflistView = listViewCentreInWindow.x - inWindow.x;
snapView.center = CGPointMake(inWindow.x+offsetXoflistView, inWindow.y+offsetYoflistView);
//判断截图横向滚动的边界
if (CGRectGetMaxX(snapView.frame)<=ScreenWidth) {
rollBeginMaxX = ScreenWidth;
}
if (CGRectGetMinX(snapView.frame)>=0) {
rollBeginMinX = 0;
}
// 当截图超过屏幕
if (CGRectGetMaxX(snapView.frame)>rollBeginMaxX) {
// 起始点
NSInteger startIndex = [self StartIndexOfView:superOFHeadView singArray:self.arrlists];
CGPoint pointOfsnapView = [self.window convertPoint:snapView.center toView:self];
// 目标点
NSInteger endIndexPoint = [self indexOfPoint:pointOfsnapView withUiview:snapView singArray:self.arrlists];
NSLog(@"%f,%f",snapView.center.x,snapView.center.y);
NSLog(@"开始下标：：：%ld",(long)startIndex);
NSLog(@"结束下标：：：%ld",(long)endIndexPoint);
//// 向后拖动
if (startIndex < endIndexPoint && endIndexPoint < _arrlists.count) {
UIView *endView = self.arrlists[endIndexPoint];
// 把截图转化成scrollView上的坐标
CGPoint snapViewInscrollView = [self convertPoint:snapView.center toView:self];
snapViewInscrollView.x = endView.yyCenterX;
for (NSInteger j = startIndex; j < endIndexPoint; j++) {
UIView *singView1 = self.arrlists[j];
UIView *singView2 = self.arrlists[j+1];
[UIView animateWithDuration:0.5 animations:^{
singView2.yyCenterX = singView1.yyCenterX;
}];
}
[self.arrlists removeObject:superOFHeadView];
[self.arrlists insertObject:snapView atIndex:endIndexPoint];
}
if (!link) {
// 初始化一个CADisplayLink 一秒调用60次
link = [CADisplayLink displayLinkWithTarget:self selector:@selector(adjustOffSet)];
[link addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
//根据截图的范围与边界的关系，调整滚动的快慢参数
if ((CGRectGetMaxX(snapView.frame) - rollBeginMaxX)/5 < 1) {
_incrementHeadView = 1;
}
else if((CGRectGetMaxX(snapView.frame) - rollBeginMaxX)/5 > 20) {
_incrementHeadView = 5;
}
else {
_incrementHeadView = (CGRectGetMaxX(snapView.frame) - rollBeginMaxX)/5;
}
}
}
else if (CGRectGetMinX(snapView.frame) < rollBeginMinX) {//向左滚动
if (!link) {
link = [CADisplayLink displayLinkWithTarget:self selector:@selector(minusContentOffset)];
[link addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
}
if (-(CGRectGetMinX(snapView.frame) - rollBeginMinX)/5 < 1) {
_increment = 1;
}
else if(-(CGRectGetMinX(snapView.frame) - rollBeginMinX)/5 > 20) {
_increment = 5;
}
else {
_increment = -(CGRectGetMinX(snapView.frame) - rollBeginMinX)/5;
}
}
else { //截图大小范围没有超过左右边界时，滚动停止
[link invalidate];
link = nil;
[link invalidate];
link = nil;
}