Ios – setting the first responder view of the table but we don’t know its type (cell/header/footer)

iosiphoneobjective c

I have UITableViewController. In this controller I add a subview UIView with UITextField in it. When the UITextField get first responder got

setting the first responder view of the table but we don't know its
type (cell/header/footer)

Code as below:

@interface UserAlbumListViewController (){
    NSString *newAlbumName;
    UITextField *albumNameField;
}

@end

-(void)addAlbumButtonPressed:(id)sender{
self.tableView.scrollEnabled = NO;
CGRect frame = self.view.frame;
UIView *opaqueView = [[UIView alloc] initWithFrame:frame];
opaqueView.tag = 1001;
opaqueView.backgroundColor = [UIColor colorWithWhite:0 alpha:0.5];


UIView *controllerView = [[UIView alloc] init];
controllerView.tag = 1002;
controllerView.backgroundColor = [UIColor whiteColor];
controllerView.frame = CGRectMake(10.0f, 60.0f, frame.size.width - 20.0f, 90.0f);
[opaqueView addSubview:controllerView];

albumNameField = [[UITextField alloc] init];
albumNameField.borderStyle = UITextBorderStyleRoundedRect; 
albumNameField.placeholder = NSLocalizedString(@"Album Name",nil);
albumNameField.keyboardType = UIKeyboardTypeDefault;
albumNameField.returnKeyType = UIReturnKeyDefault;
albumNameField.autocorrectionType = UITextAutocorrectionTypeNo;
albumNameField.autocapitalizationType = UITextAutocapitalizationTypeNone;
albumNameField.clearButtonMode = UITextFieldViewModeWhileEditing;
albumNameField.clearsOnBeginEditing = NO;
albumNameField.text = @"";
albumNameField.frame = CGRectMake(10.0f , 10.0f, controllerView.frame.size.width - 20.0f, 30.0f);
[albumNameField becomeFirstResponder];
[controllerView addSubview:albumNameField];


UIButton *_cancelButton =  [UIButton buttonWithType:UIButtonTypeRoundedRect];
_cancelButton.backgroundColor = [UIColor clearColor];
[_cancelButton setTitle:NSLocalizedString(@"Cancel",nil) forState:UIControlStateNormal];
_cancelButton.frame = CGRectMake( controllerView.frame.size.width - 90.0f,  albumNameField.frame.origin.y + albumNameField.frame.size.height + 10.0f, 80.0f, 30.0f);

[_cancelButton addTarget:self action:@selector(opaqueViewCancelButtonClicked:) forControlEvents:UIControlEventTouchDown];
[controllerView addSubview:_cancelButton];

UIButton *_OKButton =  [UIButton buttonWithType:UIButtonTypeRoundedRect];
_OKButton.backgroundColor = [UIColor clearColor];
[_OKButton setTitle:NSLocalizedString(@"OK",nil) forState:UIControlStateNormal];
_OKButton.frame = CGRectMake( _cancelButton.frame.origin.x - 90.f, _cancelButton.frame.origin.y, 80.0f, 30.0f);
[_OKButton addTarget:self action:@selector(opaqueViewOKButtonClicked:) forControlEvents:UIControlEventTouchDown];
[controllerView addSubview:_OKButton];

[self.view addSubview:opaqueView];

[controllerView release];
[opaqueView release];
}

How to avoid this warning?

Best Answer

The warning is telling you that you added opaqueView to the table view directly. Table views expect interactive subviews to be added to tableHeaderView, tableFooterView, or within a cell.

The offending line is [self.view addSubview:opaqueView]; because self.view is the table view.

You can fix this is one of several ways. If you are using a navigation controller, you can push a new controller with opaqueView in it. You can pop up a modal view over the table view with opaqueView in it. You can change the structure such that self.view is not a table view (which is a lot of work).

UPDATE

This answer is kind of busy, so I will post an update. I discovered that Apple uses a different solution then the ones I suggested.

Instead of [self.view addSubview:opaqueView]; which tries to add the subview to a table view, you can do [self.view.window addSubview:opaqueView]; which adds the subview directly to the table view's window. You need to keep in mind that you are using a view so the bounds and frame may be different than self.view.

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