action1:UILongPressGestureRecognizer
- (void)longPressRecognizer:(UILongPressGestureRecognizer *)longPress
{
WS(weakSelf);
CGPointlocation = [longPresslocationInView:self.tableView];
NSIndexPath*indexPath = [self.tableViewindexPathForRowAtPoint:location];
UIGestureRecognizerStatestate = longPress.state;
staticUIView*snapView =nil;
staticNSIndexPath*sourceIndex =nil;
switch(state) {
case UIGestureRecognizerStateBegan:
{
if(indexPath) {
sourceIndex = indexPath;
UITableViewCell*cell = [self.tableViewcellForRowAtIndexPath:indexPath];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
snapView = [selfcustomViewWithTargetView:cell];
__blockCGPointcenter = cell.center;
snapView.center= center;
snapView.alpha=0.0;
[self.tableViewaddSubview: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:
{
CGPointcenter = snapView.center;
center.y= location.y;
snapView.center= center;
UITableViewCell*cell = [self.tableViewcellForRowAtIndexPath:sourceIndex];
cell.alpha=0.0;
if(indexPath && ![indexPathisEqual:sourceIndex]) {
[self.addSignCountMArrayexchangeObjectAtIndex:indexPath.rowwithObjectAtIndex:sourceIndex.row];
[self.tableViewmoveRowAtIndexPath:sourceIndextoIndexPath:indexPath];
sourceIndex = indexPath;
}
}
break;
default:
{
UITableViewCell*cell = [self.tableViewcellForRowAtIndexPath:sourceIndex];
[UIView animateWithDuration:0.25 animations:^{
snapView.center= cell.center;
snapView.transform = CGAffineTransformIdentity;
snapView.alpha=0.0;
cell.alpha=1.0;
}completion:^(BOOLfinished) {
[snapViewremoveFromSuperview];
snapView =nil;
}];
sourceIndex =nil;
}
break;
}
}
- (UIView *)customViewWithTargetView:(UIView *)target
{
UIGraphicsBeginImageContextWithOptions(target.bounds.size,NO,0);
[target.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIView*snapshot = [[UIImageViewalloc]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;
returnsnapshot;
}
action2:system
[self.tableView setEditing:YES animated:YES];
/**
Cell是否可以移动
如返回NO，cell将不具备被拖动功能
*/
- (BOOL)tableView:(UITableView*)tableViewcanMoveRowAtIndexPath:(NSIndexPath*)indexPath{
return YES;
}
// 这个回调实现了以后，就会出现更换位置的按钮，回调本身用来处理更换位置后的数据交换。
- (void)tableView:(UITableView*)tableViewmoveRowAtIndexPath:(NSIndexPath*)sourceIndexPathtoIndexPath:(NSIndexPath*)destinationIndexPath{
NSLog(@"moveRowAtIndexPath---source:%@---destination:%@", sourceIndexPath, destinationIndexPath);
// cell移动，改变数据模型
if(sourceIndexPath.row> destinationIndexPath.row) {
[self.dataArrayinsertObject:self.dataArray[sourceIndexPath.row]atIndex:destinationIndexPath.row];
[self.dataArrayremoveObjectAtIndex:sourceIndexPath.row+1];
}else{
[self.dataArrayinsertObject:self.dataArray[sourceIndexPath.row]atIndex:destinationIndexPath.row+1];
[self.dataArrayremoveObjectAtIndex:sourceIndexPath.row];
}
}
