沒有獲取IndexPath在UITableViewCell中點擊UISwitch

Question

我在UITableViewCell中添加了UISwitch，表格內容是動態的，這意味着在tableview中可能有很多UISwitch，我需要爲每個UITableViewCell獲取UISwitch狀態，但沒有得到accessoryButtonTappedForRowWithIndexPath方法中的indexPath。

我的代碼是：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    LocationCell *cell = (LocationCell *)[tableView 
              dequeueReusableCellWithIdentifier:@"LocationCell"]; 

    UISwitch *useLocationSwitch = [[UISwitch alloc] initWithFrame:CGRectZero]; 
    [cell addSubview:useLocationSwitch]; 
    cell.accessoryView = useLocationSwitch; 

    [useLocationSwitch addTarget: self 
       action: @selector(accessoryButtonTapped:withEvent:) 
    forControlEvents: UIControlEventTouchUpInside]; 

    return cell; 
} 

- (void) accessoryButtonTapped: (UIControl *) button withEvent: (UIEvent *) event 
{ 
    NSIndexPath * indexPath = [showLocationTableView indexPathForRowAtPoint: [[[event touchesForView: button] anyObject] locationInView: showLocationTableView]]; 
    if (indexPath == nil) 
     return; 

    [showLocationTableView.delegate tableView: showLocationTableView accessoryButtonTappedForRowWithIndexPath: indexPath]; 
} 

-(void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath{ 
    NSLog(@"index path: %@", indexPath.row); 
} 

Answer 1

控制事件應該是UIControlEventValueChanged。

不是UIControlEventTouchUpInside。改變它，然後再試一次。

所以動作設置語句應該如下：

[useLocationSwitch addTarget: self 
         action: @selector(accessoryButtonTapped:withEvent:) 
      forControlEvents: UIControlEventValueChanged]; 

編輯：

- (void) accessoryButtonTapped: (UIControl *) button withEvent: (UIEvent *) event 
{ 
    UISwitch *switch1 = (UISwitch *)button; 
    UITableViewCell *cell = (UITableViewCell *)switch1.superview; 
    NSIndexPath *indexPath = [self.tableView indexPathForCell:cell]; 

    //NSIndexPath * indexPath = [showLocationTableView indexPathForRowAtPoint: [[[event touchesForView: button] anyObject] locationInView: showLocationTableView]]; 
    if (indexPath == nil) 
     return; 

    [showLocationTableView.delegate tableView: showLocationTableView accessoryButtonTappedForRowWithIndexPath: indexPath]; 
}