Question

I create an UIView in applicationDidFinishLaunchingWithOptions method:

CGRect inputTextViewRect = CGRectMake(0, 420, 320, 80);
UIView *inputTextView = [[UIView alloc] initWithFrame:inputTextViewRect];
inputTextView.backgroundColor = [UIColor grayColor];

Then I create two subviews – one UIButton and one UITextView:

UITextView *inputTextField = [[UITextView alloc] initWithFrame:CGRectMake(10, 450, 230, 20)];
UIButton *sendButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
CGRect buttonFrame = CGRectMake(250, 450, 50, 20);

My problem is if I add my inputTextField and sendButton as subviews to main window – they will be visible and working. If I add them to my UIView:

[inputTextView addSubview:inputTextField];
[inputTextView addSubview:sendButton];

And then add this view to main window:

[self.window addSubview:inputTextView];

In this case i see only gray background of inputTextView and no subviews that were added before.
Could you please help me figure out whats wrong with it?

Answer 1

The problem is with your CGRectMake call:

CGRectMake(x, y, width, height); 

x and y and are coordinates where you want to place the element over the super view, so you have the following, which is incorrect:

CGRect inputTextViewRect = CGRectMake(0, 420, 320, 80);
UITextView *inputTextField = [[UITextView alloc] initWithFrame:CGRectMake(10, 450, 230, 20)]; 
CGRect buttonFrame = CGRectMake(250, 450, 50, 20);

Try changing those to

CGRect inputTextViewRect = CGRectMake(0, 0, 320, 80);
UITextView *inputTextField = [[UITextView alloc] initWithFrame:CGRectMake(0, 0, 230, 20)];
CGRect buttonFrame = CGRectMake(0, 0, 50, 20);

After changing this you will be able to see UITextView and UIButton, then you make the x and y position changes according to your need.