creating uiview programmatically?

Question

Creating a view with following code.

  - (void)loadView {

paintView=[[UIView alloc]initWithFrame:CGRectMake(0, 50, 320, 430)];
[paintView setBackgroundColor:[UIColor yellowColor]];
self.view = paintView;
[paintView release];

But my problem is whole screen fills with yellow color, but I want with specified frame. I am creating this view in a view based application.. Am i doing something wrong, Overridind the original view?

why you are assigning paintView to self.view self.view =paintView; — Aadil
– Aadil, Commented Dec 21, 2011 at 10:41

AechoLiu · Accepted Answer · 2014-05-14 03:05:24Z

27

You can do it in following way.

  - (void)loadView {
    /// make a empty view to self.view 
    /// after calling [super loadView], self.view won't be nil anymore. 
    [super loadView]; 

    paintView=[[UIView alloc]initWithFrame:CGRectMake(0, 50, 320, 430)];
    [paintView setBackgroundColor:[UIColor yellowColor]];
    [self.view addSubview:paintView];
    [paintView release];
  };

edited May 14, 2014 at 3:05

answered Dec 21, 2011 at 10:46

AechoLiu

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4 Comments

Alexey Golikov Over a year ago

Your custom implementation of this method should not call super. If you want to perform any additional initialization of your views, do so in the viewDidLoad method.

AechoLiu Over a year ago

@Alexey, Maybe in your case, you don't need to implement the custom loadView. And this answer is some kind old. At iOS SDK 4/5, this answer is right. The [super loadView] will generate a empty view to self.view. And under iOS 7 now, I don't know that works or not.

Engin Yapici Over a year ago

There is a typo in the code and SO won't let me edit the answer. The method is "addSubview" not "addSubView".

AechoLiu Over a year ago

Thank you very much. I had modify the answer.

Ravi Kumar Karunanithi · Accepted Answer · 2011-12-21 11:15:34Z

3

UIView *newView = [[UIView alloc] initWithFrame:CGRectMake(0,0,320,35)];
newView.backgroundColor=[UIColor clearColor];
UITextView *mytext = [[UITextView alloc] initWithFrame:CGRectMake(5.0, 0.0, 100.0, 28.0)];
mytext.backgroundColor = [UIColor clearColor];
mytext.textColor = [UIColor blackColor];
mytext.editable = NO;
mytext.font = [UIFont systemFontOfSize:15];
mytext.text = @"Mytext";
mytext.scrollEnabled=NO;
[mytext release];
[newView addSubview:mytext];
[self.view addSubview:newView];

answered Dec 21, 2011 at 11:15

Ravi Kumar Karunanithi

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Comments

iCoder4777 · Accepted Answer · 2011-12-21 10:45:58Z

0

replace self.view =paintView; by

[self.view addSubview: paintView];

answered Dec 21, 2011 at 10:45

iCoder4777

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2 Comments

iCoder4777 Over a year ago

u have missed [super loadView] in ur loadview, add this then ur app won't crashes.

James Webster Over a year ago

You should change your answer to include the correct solution from the comments.

Aadil · Accepted Answer · 2011-12-21 10:46:26Z

0

I am Going change Line No 3 in LoadView Method , you should add the subView in main View instead on assiging it Directly.

[self.view addSubview:paintview];

answered Dec 21, 2011 at 10:46

Aadil

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