Objective C - OpenGL ES | [EAGLView] unrecognized selector sent to instance - ios

Question

I have an IOS app with two ViewController and both are working with Opengl ES.
I have a button which allows me to go from the first ViewController to the second one.
however, after touching the button, my app crash with this error message :
[EAGLView setDrawableDepthFormat:]: unrecognized selector sent to instance 0x15e5daa00
Here my code :
ViewControllerB.m
#interface ViewControllerB ()
{
....
PointCloudRenderer *_renderer;
....
}
- (id)initWithNibName:(NSString *)nibNameOrNil
bundle:(NSBundle *)nibBundleOrNil
{
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:#"Back"
style:UIBarButtonItemStylePlain
target:self
action:#selector(dismissView)];
self.navigationItem.leftBarButtonItem = backButton;
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
self.title = #"Point Cloud viewer";
}
// GL setup
_renderer = [[PointCloudRenderer alloc] initWithCols:DATA_COLS rows:DATA_ROWS];
if (!_renderer) {
NSLog(#"Failed to create renderer.");
return;
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.context = _renderer.context;
GLKView *view = (GLKView *)self.view;
view.context = self.context;
view.drawableDepthFormat = _renderer.drawableDepthFormat; //Crash here
[self setupGestureRecognizer];
}
PointCloudRenderer.m
- (PointCloudRenderer *)initWithCols:(size_t)cols rows:(size_t)rows
{
self.context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
// self.context = [EAGLContext currentContext];
assert (self.context != nil);
if (!self.context) {
NSLog(#"Failed to create ES context");
return nil;
}
_cols = cols;
_rows = rows;
_fx = QVGA_F_X/QVGA_COLS*cols;
_fy = QVGA_F_X/QVGA_ROWS*rows;
_cx = QVGA_C_X/QVGA_COLS*cols;
_cy = QVGA_C_Y/QVGA_ROWS*rows;
_pointsData = [[NSMutableData alloc] initWithCapacity:cols * rows * 3 * sizeof(float)];
_imageData = [[NSMutableData alloc] initWithCapacity:cols * rows * 4 * sizeof(char)];
[self initGL];
return self;
}
- (void)initGL
{
[EAGLContext setCurrentContext:self.context];
//Enable shader
[self loadShaders];
glEnable(GL_DEPTH_TEST);
glGenVertexArraysOES(1, &_pointArray);
glBindVertexArrayOES(_pointArray);
glGenBuffers(1, &_pointBuffer);
glBindBuffer(GL_ARRAY_BUFFER, _pointBuffer);
glBufferData(GL_ARRAY_BUFFER, _cols * _rows * 3 * sizeof(GLfloat) + sizeof(gTestPoints), NULL, GL_DYNAMIC_DRAW);
glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(gTestPoints), gTestPoints);
glEnableVertexAttribArray(GLKVertexAttribPosition);
glVertexAttribPointer(GLKVertexAttribPosition, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(GLfloat), NULL);
glGenBuffers(1, &_colorBuffer);
glBindBuffer(GL_ARRAY_BUFFER, _colorBuffer);
glBufferData(GL_ARRAY_BUFFER, _cols * _rows * 4 * sizeof(GLbyte) + sizeof(gTestPointColors), NULL, GL_DYNAMIC_DRAW);
glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(gTestPointColors), gTestPointColors);
glEnableVertexAttribArray(GLKVertexAttribColor);
glVertexAttribPointer(GLKVertexAttribColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, 4 * sizeof(GLubyte), NULL);
glBindVertexArrayOES(0);
}
- (GLKViewDrawableDepthFormat)drawableDepthFormat
{
return GLKViewDrawableDepthFormat24;
}
I really do not know why my app crashed. I was careful of initializing well OpenGl ES.
Could you please help me ?
Thank