我有一个UITableViewController子类，它被另外两个类子类化。在这两个表的某些单元格中，我有一个用户可以单击以执行操作的图像。一切正常，我很高兴，除了在 2 个子类中的一个中，该表的第一行有问题。您只能通过单击图像的最右侧边缘来单击图像。如果您单击图像的主体，它会改为调用表的 didSelectRowAtIndexPath。
令我感到困惑的是，它适用于所有行的其他类，甚至在它不起作用的那个类中，它也适用于显示该图像的所有其他行。这是我用来将图像和手势识别器添加到我的单元格中的代码：
UIImageView *imgparent = [[UIImageView alloc] initWithFrame:CGRectMake(offsetleftmain, 24.0, 14.0, 16.0)];
imgparent.image = [UIImage imageNamed:@"item_open.png"];
imgparent.tag = ITEMOPENTAG;
// add listener
imgparent.userInteractionEnabled = YES;
UITapGestureRecognizer *singleFingerDTapParent = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(loadChildren:)];
[imgparent addGestureRecognizer:singleFingerDTapParent];
[singleFingerDTapParent release];
[cell.contentView addSubview:imgparent];
[imgparent release];
顺便说一句，我正在模拟器中进行测试。我尝试用按钮替换图像，但问题仍然存在。有任何想法吗？
编辑：这是单击图像时调用的代码的开头。同样，这有效，但在这一行的情况下，它仅在您单击图像的右边缘时才有效。我附上了一个截图来说明。第一个圆圈表示我必须点击的位置才能调用我的手势。第二个在同一个表中显示了一个示例，允许您单击整个图像。我很困惑。
- (void)loadChildren:(UIGestureRecognizer *)gestureRecognizer {
NSLog(@"loadChildren");
// get the cell
UITableViewCell *cell = (UITableViewCell *)gestureRecognizer.view.superview.superview;
UIImageView *imgvw = (UIImageView *)[cell viewWithTag:ITEMOPENTAG]; // open arrow
[imgvw setHidden:YES]; // hide open arrow
imgvw = (UIImageView *)[cell viewWithTag:ITEMCLOSETAG]; // close arrow
[imgvw setHidden:NO]; // show close arrow
// get the record for the cell
NSIndexPath *indexPath = [tableView indexPathForCell:cell];
}
编辑：这是完整的tableView:cellForRowAtIndexPath:indexPath. 请记住，它是从cellForRowAtIndexPath此类的其他 2 个子类中调用的，每个子类都简单地传入一个标识符withType：
- (UITableViewCell *)tableView:(UITableView *)tv
cellForRowAtIndexPath:(NSIndexPath *)indexPath
withType:(NSString *)s_type
{
UITableViewCell *cell = nil;
// if dealing with empty region then show no tasks cell
if(s_type == @"noTasksCell"){
cell = [tv dequeueReusableCellWithIdentifier:@"noTasksCell"];
if( cell == nil ) {
cell = [[[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:@"noTasksCell"] autorelease];
}
cell.textLabel.text = @"No tasks";
cell.textLabel.textColor = [UIColor lightGrayColor];
cell.textLabel.font = [UIFont systemFontOfSize:14];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
return cell;
}
UILabel *lblMain;
NSDictionary *o_rec = [self getRecForPath:indexPath];
NSString *s_cell = @"rowCell";
BOOL b_parent = NO;
BOOL b_parentOpen = NO;
BOOL b_child = NO;
BOOL b_checked = NO;
if([self isParent:indexPath]){
b_parent = YES;
b_parentOpen = !([o_rec objectForKey:@"b_open"] == nil || [[o_rec objectForKey:@"b_open"] isEqualToNumber:[NSNumber numberWithInt:0]]);
s_cell = [s_cell stringByAppendingString:@"Parent"];
}
if([o_rec objectForKey:@"b_child"] != nil){
b_child = YES;
s_cell = [s_cell stringByAppendingString:[NSString stringWithFormat:@"Child%@",[o_rec objectForKey:@"indent"]]];
}
if([[o_rec objectForKey:@"checked"] isEqualToNumber:[NSNumber numberWithInt:1]]){
b_checked = YES;
s_cell = [s_cell stringByAppendingString:@"isComplete"];
}
// add the following to the name:
// - project id
// - width of table to the name so that rotations will change the cell dequeue names
// - priority
s_cell = [s_cell stringByAppendingFormat:
@"Proj%@Width%dP%@"
,[o_rec objectForKey:@"project_id"]
,(int)tv.bounds.size.width
,[[o_rec objectForKey:@"priority"] stringValue]
];
cell = [tv dequeueReusableCellWithIdentifier:s_cell];
if( cell == nil ) {
cell = [[[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault reuseIdentifier:s_cell] autorelease];
cell.textLabel.hidden = YES; // hide the regular text label
cell.selectedBackgroundView = [[[UIView alloc] initWithFrame:CGRectZero] autorelease];
cell.selectedBackgroundView.backgroundColor = [delegate colorForHexWithAlpha:0xffcc66ff];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
int offsetleftmain = 10;
if(b_child){
offsetleftmain += ([[o_rec objectForKey:@"indent"] intValue]-1) * 18;
}
if(b_parent){
// parent arrow
UIImageView *imgparent = [[UIImageView alloc] initWithFrame:CGRectMake(offsetleftmain, 24.0, 14.0, 16.0)];
imgparent.image = [UIImage imageNamed:@"item_open.png"];
imgparent.tag = ITEMOPENTAG;
// add listener
imgparent.userInteractionEnabled = YES;
UITapGestureRecognizer *singleFingerDTapParent = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(loadChildren:)];
singleFingerDTapParent.numberOfTapsRequired = 1;
singleFingerDTapParent.numberOfTouchesRequired = 1;
[imgparent addGestureRecognizer:singleFingerDTapParent];
[singleFingerDTapParent release];
[cell.contentView addSubview:imgparent];
[imgparent release];
// close arrow
UIImageView *imgparent2 = [[UIImageView alloc] initWithFrame:CGRectMake(offsetleftmain-2, 24.0, 16.0, 14.0)];
imgparent2.image = [UIImage imageNamed:@"item_close.png"];
imgparent2.tag = ITEMCLOSETAG;
imgparent2.userInteractionEnabled = YES;
UITapGestureRecognizer *singleFingerDTapParent2 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideChildren:)];
[imgparent2 addGestureRecognizer:singleFingerDTapParent2];
[singleFingerDTapParent2 release];
[cell.contentView addSubview:imgparent2];
[imgparent2 release];
}
offsetleftmain += 18;
// checkbox
UIImageView *imgchk = [[UIImageView alloc] initWithFrame:CGRectMake(offsetleftmain, 20.0, 24.0, 24.0)];
imgchk.image = [UIImage imageNamed:@"check_empty.png"];
imgchk.tag = EMPTYCHECKTAG;
// add listener
imgchk.userInteractionEnabled = YES;
UITapGestureRecognizer *singleFingerDTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(checkOnItem:)];
[imgchk addGestureRecognizer:singleFingerDTap];
[singleFingerDTap release];
[cell.contentView addSubview:imgchk];
[imgchk release];
// checked checkbox
UIImageView *imgchk2 = [[UIImageView alloc] initWithFrame:CGRectMake(offsetleftmain, 20.0, 24.0, 24.0)];
imgchk2.image = [UIImage imageNamed:@"check_checked.png"];
imgchk2.tag = CHECKTAG;
// add listener
imgchk2.userInteractionEnabled = YES;
UITapGestureRecognizer *singleFingerDTap2 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(checkOffItem:)];
[imgchk2 addGestureRecognizer:singleFingerDTap2];
[singleFingerDTap2 release];
[cell.contentView addSubview:imgchk2];
[imgchk2 release];
offsetleftmain += 28;
// main label
lblMain = [[UILabel alloc] initWithFrame:CGRectMake(offsetleftmain, 22.0, tv.bounds.size.width-offsetleftmain-10, 30.0)];
lblMain.tag = MAINLABELTAG;
lblMain.numberOfLines = 4;
lblMain.font = delegate.font_dflt;
// change color based on priority
if (5-[[o_rec objectForKey:@"priority"] intValue] == 1)
lblMain.textColor = [UIColor redColor];
else if (5-[[o_rec objectForKey:@"priority"] intValue] == 2)
lblMain.textColor = [delegate colorForHexWithAlpha:H_P2COLOR];
else if (5-[[o_rec objectForKey:@"priority"] intValue] == 3)
lblMain.textColor = [delegate colorForHexWithAlpha:H_P3COLOR];
[cell.contentView addSubview:lblMain];
[lblMain release];
// show action sheet for long press and hold
UILongPressGestureRecognizer *clicknHold = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(cellClicknHold:)];
[cell addGestureRecognizer:clicknHold];
[clicknHold release];
}
cell.selectionStyle = UITableViewCellSelectionStyleNone;
// task text
lblMain = (UILabel *)[cell viewWithTag:MAINLABELTAG];
lblMain.text = [self formatContent:[o_rec objectForKey:@"content"]];
CGRect newFrame = lblMain.frame;
newFrame.size.height = [[o_rec objectForKey:@"height"] floatValue];
//newFrame.size.height = [[o_rec objectForKey:@"height"] floatValue]+12;
lblMain.frame = newFrame;
// set checked status
[(UIImageView *)[cell viewWithTag:EMPTYCHECKTAG]
setHidden:[[o_rec objectForKey:@"checked"] boolValue]];
[(UIImageView *)[cell viewWithTag:CHECKTAG]
setHidden:![[o_rec objectForKey:@"checked"] boolValue]];
// show open arrow if dealing with parent cell
if (b_parent) {
//NSLog(@"b_parentOpen:%d",b_parentOpen);
[(UIImageView *)[cell viewWithTag:ITEMOPENTAG] setHidden:b_parentOpen];
[(UIImageView *)[cell viewWithTag:ITEMCLOSETAG] setHidden:!b_parentOpen];
}
return cell;
}