UITableView:自定义手势使其不再滚动 [英] UITableView: custom gestures make it scrolling no more
问题描述
我有一个UIViewController，其中包含一个UITableView(子类化)和另一个UIView(子类化).它们处于相同的层次结构级别，但是UIView添加到最后，因此它是最前面的.我重写touchesBegan/Moved/Ended以从顶部UIView截取手势:我的目标是获取选定的UITableViewCell，如果两次轻按，则创建要拖动的ImageView.我似乎可以完成它，但是现在即使我转发了触摸事件，我也无法再滚动UITableView了.这是UIView的方法:
I have an UIViewController which contains a UITableView (subclassed) and another UIView (subclassed). They are on the same hierarchy level but the UIView is added last so it is the frontmost. I overrid touchesBegan/Moved/Ended to intercept the Gestures from the top UIView: my goal is to get the selected UITableViewCell and, if double tapped, create an ImageView to be dragged around. I appear to get it done but now I cannot scroll the UITableView anymore, even though I forward the touch events. Here are the methods for the UIView:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
NSLog(@"BO");
UITouch * touch = [touches anyObject];
CGPoint tPoint = [touch locationInView:self];
InventoryViewController * invViewCont = self.viewController;
UITableView * invTab = invViewCont.inventoryTableView;
[invTab deselectRowAtIndexPath:[invTab indexPathForSelectedRow]
animated:YES];
NSArray * cells = [invTab visibleCells];
BOOL found = NO;
for (UITableViewCell * cell in cells)
{
if (CGRectContainsPoint(cell.frame, tPoint))
{
[cell touchesBegan:touches withEvent:event];
found = YES;
break;
}
}
if (!found)
{
[invViewCont.inventoryTableView touchesBegan:touches withEvent:event];
}
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
NSLog(@"Mo");
UITouch * touch = [touches anyObject];
CGPoint tPoint = [touch locationInView:self];
copyObj.center = tPoint;
InventoryViewController * invViewCont = self.viewController;
UITableView * invTab = invViewCont.inventoryTableView;
[invTab deselectRowAtIndexPath:[invTab indexPathForSelectedRow]
animated:YES];
NSArray * cells = [invTab visibleCells];
BOOL found = NO;
for (UITableViewCell * cell in cells)
{
if (CGRectContainsPoint(cell.frame, tPoint))
{
[cell touchesMoved:touches withEvent:event];
found = YES;
break;
}
}
if (!found)
{
[invViewCont.inventoryTableView touchesMoved:touches withEvent:event];
}
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch * touch = [touches anyObject];
if ([touch tapCount] == 2)
{
[self desubCopyView];
}
CGPoint tPoint = [touch locationInView:self];
copyObj.center = tPoint;
InventoryViewController * invViewCont = self.viewController;
UITableView * invTab = invViewCont.inventoryTableView;
[invTab deselectRowAtIndexPath:[invTab indexPathForSelectedRow]
animated:YES];
NSArray * cells = [invTab visibleCells];
BOOL found = NO;
for (UITableViewCell * cell in cells)
{
if (CGRectContainsPoint(cell.frame, tPoint))
{
[cell touchesEnded:touches withEvent:event];
//[cell.imageView touchesEnded:touches withEvent:event];
found = YES;
break;
}
}
if (!found)
{
[invViewCont.inventoryTableView touchesEnded:touches withEvent:event];
}
}
这是UITableViewCell中的那些
And here are those in the UITableViewCell
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch * touch = [touches anyObject];
if ([touch tapCount] == 2)
{
CGPoint tPoint = [touch locationInView:self];
NSLog(@"CellX %lf CY %lf", tPoint.x, tPoint.y);
UIGraphicsBeginImageContext(self.bounds.size);
[self.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageView * newView = [[UIImageView alloc] initWithImage:viewImage];
[dragArea addSubview:newView];
dragArea.copyObj = newView;
[newView release];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.4];
dragArea.copyObj.transform = CGAffineTransformMakeScale(1.3, 1.3);
[UIView commitAnimations];
tPoint = [self convertPoint:tPoint toView:dragArea];
dragArea.copyObj.center = tPoint;
}
[super touchesBegan:touches withEvent:event];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
NSLog(@"MOV %@", self.imageView.image);
[super touchesMoved:touches withEvent:event];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
NSLog(@"ENDED");
[super touchesEnded:touches withEvent:event];
}
在我的UITableView中，我只是:
And in my UITableView I have simply:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
NSLog(@"BEGTB");
[super touchesBegan:touches withEvent:event];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
NSLog(@"MOVTB");
[super touchesMoved:touches withEvent:event];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
NSLog(@"ENDTB");
[super touchesEnded:touches withEvent:event];
}
我肯定会丢失一些东西，但是我不知道什么
I am surely missing something but I do not know what
推荐答案
我找到了解决方法，请在我的自定义UITableView中覆盖触摸手势的方法，以使其在我向其拖动对象时以编程方式滚动.此处是解决方案".
I found a workaround for this, override the methods for touch gestures in my custom UITableView in order to make it scroll programMatically as I drag upon it an object. Here is the 'solution'.
我仍然相信还有另一种更简单的方法可以执行此操作，但是我没有找到它，因此发布并标记为答案"可能会对其他人有所帮助.
I still believe there is another simpler way to do this but I did not find it, so posting this and marking it as an 'answer' might help someone else.
这篇关于UITableView:自定义手势使其不再滚动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
