Hi everyone!
how can i push a view from a subview?
i've implemented a paging scroll view with custom view. each view has some button and from this buttom i want to push other view into navigation controller.
how can i do it?
thanks
this is the code: RadicalResearchViewController.h
#import <UIKit/UIKit.h>
@class ListOneViewController;
@class ListTwoViewController;
@class ListThreeViewController;
@class ListFourViewController;
@interface RadicalResearchViewController : UIViewController<UIScrollViewDelegate> {
UIScrollView *scrollView;
UIPageControl *pageControl;
NSMutableArray *viewControllers;
ListOneViewController *lista1;
ListTwoViewController *lista2;
ListThreeViewController *lista3;
ListFourViewController *lista4;
// To be used when scrolls originate from the UIPageControl
BOOL pageControlUsed;
}
@property (nonatomic, retain) IBOutlet UIScrollView *scrollView;
@property (nonatomic, retain) IBOutlet UIPageControl *pageControl;
@property (nonatomic, retain) NSMutableArray *viewControllers;
@property (nonatomic, retain) ListOneViewController *lista1;
@property (nonatomic, retain) ListTwoViewController *lista2;
@property (nonatomic, retain) ListThreeViewController *lista3;
@property (nonatomic, retain) ListFourViewController *lista4;
- (IBAction)changePage:(id)sender;
@end
RadicalResearchViewController.m
#import "RadicalResearchViewController.h"
#import "ListOneViewController.h"
#import "ListTwoViewController.h"
#import "ListThreeViewController.h"
#import "ListFourViewController.h"
static NSUInteger kNumberOfPages = 4;
@interface RadicalResearchViewController (PrivateMethods)
- (void)loadScrollViewWithPage:(int)page;
- (void)scrollViewDidScroll:(UIScrollView *)sender;
@end
@implementation RadicalResearchViewController
@synthesize scrollView, pageControl, viewControllers, lista1, lista2, lista3, lista4;
- (void)dealloc {
[lista1 release];
[lista2 release];
[lista3 release];
[lista4 release];
[viewControllers release];
[scrollView release];
[pageControl release];
[super dealloc];
}
- (void)viewDidLoad{
// view controllers are created lazily
// in the meantime, load the array with placeholders which will be replaced on demand
NSMutableArray *controllers = [[NSMutableArray alloc] init];
//PageOneViewController *view1 =
for (unsigned i = 0; i < kNumberOfPages; i++) {
[controllers addObject:[NSNull null]];
}
self.viewControllers = controllers;
[controllers release];
// a page is the width of the scroll view
scrollView.pagingEnabled = YES;
scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * kNumberOfPages, scrollView.frame.size.height);
scrollView.showsHorizontalScrollIndicator = NO;
scrollView.showsVerticalScrollIndicator = NO;
scrollView.scrollsToTop = NO;
scrollView.delegate = self;
pageControl.numberOfPages = kNumberOfPages;
pageControl.currentPage = 0;
NSArray *lista = [self.navigationController viewControllers];
NSLog(@"num elementi lista: %d",[lista count]);
// pages are created on demand
// load the visible page
// load the page on either side to avoid flashes when the user starts scrolling
[self loadScrollViewWithPage:0];
[self loadScrollViewWithPage:1];
}
- (IBAction)changePage:(id)sender {
int page = pageControl.currentPage;
// load the visible page and the page on either side of it (to avoid flashes when the user starts scrolling)
[self loadScrollViewWithPage:page - 1];
[self loadScrollViewWithPage:page];
[self loadScrollViewWithPage:page + 1];
// update the scroll view to the appropriate page
CGRect frame = scrollView.frame;
frame.origin.x = frame.size.width * page;
frame.origin.y = 0;
[scrollView scrollRectToVisible:frame animated:YES];
// Set the boolean used when scrolls originate from the UIPageControl. See scrollViewDidScroll: above.
pageControlUsed = YES;
}
- (void)loadScrollViewWithPage:(int)page {
NSLog(@"page =%d",page);
if (page < 0) return;
if (page >= kNumberOfPages) return;
if (page == 0){
lista1 = [viewControllers objectAtIndex:page];
if((NSNull *)lista1 == [NSNull null]) {
lista1 = [[ListOneViewController alloc] initWithNibName:@"ListOneViewController" bundle:nil];
[viewControllers replaceObjectAtIndex:page withObject:lista1];
[lista1 release];
}
// add the controller's view to the scroll view
if (nil == lista1.view.superview) {
CGRect frame = scrollView.frame;
frame.origin.x = frame.size.width * page;
frame.origin.y = 0;
lista1.view.frame = frame;
[scrollView addSubview:lista1.view];
//[self.navigationController pushViewController:lista1 animated:YES]; //Here i can push new view into the navigation's stack ban i cannot scroll into the other pages
}
}else if (page == 1){
lista2 = [viewControllers objectAtIndex:page];
if((NSNull *)lista2 == [NSNull null]) {
lista2 = [[ListTwoViewController alloc] initWithNibName:@"ListTwoViewController" bundle:nil];
[viewControllers replaceObjectAtIndex:page withObject:lista2];
[lista2 release];
}
// add the controller's view to the scroll view
if (nil == lista2.view.superview) {
CGRect frame = scrollView.frame;
frame.origin.x = frame.size.width * page;
frame.origin.y = 0;
lista2.view.frame = frame;
[scrollView addSubview:lista2.view];
}
}else if (page == 2){
lista3 = [viewControllers objectAtIndex:page];
if((NSNull *)lista3 == [NSNull null]) {
lista3 = [[ListThreeViewController alloc] initWithNibName:@"ListThreeViewController" bundle:nil];
[viewControllers replaceObjectAtIndex:page withObject:lista3];
[lista3 release];
}
// add the controller's view to the scroll view
if (nil == lista3.view.superview) {
CGRect frame = scrollView.frame;
frame.origin.x = frame.size.width *page;
frame.origin.y = 0;
lista3.view.frame = frame;
[scrollView addSubview:lista3.view];
}
}else if (page == 3){
lista4 = [viewControllers objectAtIndex:page];
if((NSNull *)lista4 == [NSNull null]) {
lista4 = [[ListFourViewController alloc] initWithNibName:@"ListFourViewController" bundle:nil];
[viewControllers replaceObjectAtIndex:page withObject:lista4];
[lista4 release];
}
// add the controller's view to the scroll view
if (nil == lista4.view.superview) {
CGRect frame = scrollView.frame;
frame.origin.x = frame.size.width *page;
frame.origin.y = 0;
lista4.view.frame = frame;
[scrollView addSubview:lista4.view];
}
}
}
- (void)scrollViewDidScroll:(UIScrollView *)sender {
// We don't want a "feedback loop" between the UIPageControl and the scroll delegate in
// which a scroll event generated from the user hitting the page control triggers updates from
// the delegate method. We use a boolean to disable the delegate logic when the page control is used.
if (pageControlUsed) {
// do nothing - the scroll was initiated from the page control, not the user dragging
return;
}
// Switch the indicator when more than 50% of the previous/next page is visible
CGFloat pageWidth = scrollView.frame.size.width;
int page = floor((scrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
pageControl.currentPage = page;
// load the visible page and the page on either side of it (to avoid flashes when the user starts scrolling)
[self loadScrollViewWithPage:page - 1];
[self loadScrollViewWithPage:page];
[self loadScrollViewWithPage:page + 1];
// A possible optimization would be to unload the views+controllers which are no longer visible
}
// At the begin of scroll dragging, reset the boolean used when scrolls originate from the UIPageControl
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
pageControlUsed = NO;
}
// At the end of scroll animation, reset the boolean used when scrolls originate from the UIPageControl
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
pageControlUsed = NO;
}
/*
- (IBAction)changePage:(id)sender {
int page = pageControl.currentPage;
// load the visible page and the page on either side of it (to avoid flashes when the user starts scrolling)
[self loadScrollViewWithPage:page - 1];
[self loadScrollViewWithPage:page];
[self loadScrollViewWithPage:page + 1];
// update the scroll view to the appropriate page
CGRect frame = scrollView.frame;
frame.origin.x = frame.size.width * page;
frame.origin.y = 0;
[scrollView scrollRectToVisible:frame animated:YES];
// Set the boolean used when scrolls originate from the UIPageControl. See scrollViewDidScroll: above.
pageControlUsed = YES;
}
*/
@end
ListOneViewController .h #import
@class RadicalListKanjiViewController;
@interface ListOneViewController : UIViewController<UIScrollViewDelegate> {
UIScrollView *scrollView;
RadicalListKanjiViewController *childController;
UIButton *myButton;
}
@property (nonatomic, retain) IBOutlet UIScrollView *scrollView;
@property (nonatomic, retain) RadicalListKanjiViewController *childController;
@property (nonatomic, retain) IBOutlet UIButton *myButton;
- (IBAction)buttonPressed:(id)sender;
@end
ListOneViewController .m
#import "ListOneViewController.h"
#import "KanjiDetailViewController.h"
#import "RadicalListKanjiViewController.h"
#import "DizionarioAppDelegate.h"
#import "RadicalResearchViewController.h"
@implementation ListOneViewController
@synthesize scrollView, childController, myButton;
- (void)viewDidLoad{
// a page is the width of the scroll view
scrollView.pagingEnabled = NO;
scrollView.contentSize = CGSizeMake(320, 1600);
scrollView.showsHorizontalScrollIndicator = NO;
scrollView.showsVerticalScrollIndicator = YES;
scrollView.scrollsToTop = YES;
scrollView.delegate = self;
}
- (IBAction)buttonPressed:(id)sender {
/*
NSLog(@"buttonPressed usato");
Radicale = [sender titleForState:UIControlStateNormal];
NSLog(@"radicale scelto: %@", Radicale);
*/
if (childController == nil){
NSLog(@"è nil");
childController = [[RadicalListKanjiViewController alloc] initWithNibName:@"RadicalListKanjiViewController" bundle:nil];
}
//childController.radicale = Radicale;
NSLog(@"oggetto creato: %@", childController);
[self.navigationController pushViewController:childController animated:YES];
}
/*
// The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
// Custom initialization
}
return self;
}
*/
/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
}
*/
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[scrollView release];
[super dealloc];
}
@end