//cell长按拖动排序
- (void)longPressRecognizer:(UILongPressGestureRecognizer *)longPress{
//获取长按的点及cell
CGPoint location = [longPress locationInView:self.myTableView];
NSIndexPath *indexPath = [self.myTableView indexPathForRowAtPoint:location];
UIGestureRecognizerState state = longPress.state;
static UIView *snapView = nil;
static NSIndexPath *sourceIndex = nil;
switch (state) {
case UIGestureRecognizerStateBegan:{
if (indexPath) {
sourceIndex = indexPath;
UITableViewCell *cell = [self.myTableView cellForRowAtIndexPath:indexPath];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
snapView = [self customViewWithTargetView:cell];
__block CGPoint center = cell.center;
snapView.center = center;
snapView.alpha = 0.0;
[self.myTableView addSubview:snapView];
[UIView animateWithDuration:0.1 animations:^{
center.y = location.y;
snapView.center = center;
snapView.transform = CGAffineTransformMakeScale(1.05, 1.05);
snapView.alpha = 0.5;
cell.alpha = 0.0;
}];
}
}
break;
case UIGestureRecognizerStateChanged:{
CGPoint center = snapView.center;
center.y = location.y;
snapView.center = center;
UITableViewCell *cell = [self.myTableView cellForRowAtIndexPath:sourceIndex];
cell.alpha = 0.0;
if (indexPath && ![indexPath isEqual:sourceIndex]) {
[self.dataArrayM exchangeObjectAtIndex:indexPath.row withObjectAtIndex:sourceIndex.row];
[self.myTableView moveRowAtIndexPath:sourceIndex toIndexPath:indexPath];
sourceIndex = indexPath;
}
}
break;
default:{
UITableViewCell *cell = [self.myTableView cellForRowAtIndexPath:sourceIndex];
[UIView animateWithDuration:0.25 animations:^{
snapView.center = cell.center;
snapView.transform = CGAffineTransformIdentity;
snapView.alpha = 0.0;
cell.alpha = 1.0;
} completion:^(BOOL finished) {
[snapView removeFromSuperview];
snapView = nil;
}];
sourceIndex = nil;
}
break;
}
}
- (void)dragButtonClick:(UIButton *)button{
//添加长按手势
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressRecognizer:)];
self.longPress = longPress;
longPress.minimumPressDuration = 0.0;
[button addGestureRecognizer:longPress];
}
//截取选中cell
- (UIView *)customViewWithTargetView:(UIView *)target{
UIGraphicsBeginImageContextWithOptions(target.bounds.size, NO, 0);
[target.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIView *snapshot = [[UIImageView alloc] initWithImage:image];
snapshot.layer.masksToBounds = NO;
snapshot.layer.cornerRadius = 0.0;
snapshot.layer.shadowOffset = CGSizeMake(-5.0, 0.0);
snapshot.layer.shadowRadius = 5.0;
snapshot.layer.shadowOpacity = 0.4;
return snapshot;
}
UITableViewCell长按拖动排序
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