Question

I use xcode 4.4 with ARC on. I have dynamically created UIViews in the ViewController.m:

UIView* myviews[10];

Then in the – (void)viewDidLoad function i fill each of it with pictures i need

myviews[viewIndex] = [[UIView alloc]initWithFrame:myrec];
UIImage *testImg;
UIImageView * testImgView = [[UIImageView alloc]init];
testImg = [UIImage imageNamed:[NSString stringWithFormat:@"imgarray%d.png", viewIndex];
[testImgView setImage:testImg];
[myviews[viewIndex] addsubView:testImgView];
viewindex++;

So all seems to be fine, when i want to jump from one view to another i do with two buttons next:

[self.view addSubview:views[viewIndex]];
CATransition *animation = [CATransition animation];
[animation setDelegate:self];
[animation setDuration:1.0f];
[animation setType:@"rippleEffect"];
[animation setSubtype:kCATransitionFromTop];
//[animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
[self.view.layer addAnimation:animation forKey:@"transitionViewAnimation"];

Nothing seems to be bad, but the memory consumption grows with huge speed when i switch between views.. and then i get low memory warning or sometimes application will just crash.

I have tried to use UIViewController array and was switching between the controllers: nothing changes, the memory low warning is what i end up with..

Maybe i need to clean the memory somehow? But how? ARC does not allow to use release and so on..

last what i have tried (sorry, maybe not very professional) before to add new subview is this

NSArray *viewsToRemove = [self.view subviews];
                    for (UIView *views in viewsToRemove) {
                        [views removeFromSuperview];
                    }

But this does not help either.

EDIT: I need to clarify one thing: i need each UIView during the application execution, this means i can’t release it before the application exit.

EDIT2: code is edited to look more alike the real code.

Answer 1

A few thoughts:

First, something’s not right in the code as copied, as you never create testImgView. Instead of

testImgView.image = testImg;

you need

testImgView = [UIImageView viewWithImage:image];

Second, you don’t need to go into layer animation. See this code instead…

[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:1.0];
[UIView setAnimationTransition: 110 forView:view cache:NO];  //110 for ripple effect
[UIView commitAnimations];

Third, you could try just adding all your views in viewDidLoad with tags and then setting visible.