CoverFlow multiple Views - ios4

Good Morning at all,
i have a big problem in the following code and no solution, so i hope someone could
help me:
- (IBAction)goToChart {
[rootViewController switchViews];
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
UIButton *weiter = [UIButton buttonWithType:UIButtonTypeRoundedRect];
weiter.frame = CGRectMake(100, 400, 120, 40);
[weiter addTarget:self action:#selector(goToChart) forControlEvents:UIControlEventTouchUpInside];
NSString *ansicht = #"Weiter";
[weiter setTitle:ansicht forState:UIControlStateNormal];
[self.view addSubview:weiter];
// loading images into the queue
loadImagesOperationQueue = [[NSOperationQueue alloc] init];
NSString *imageName;
for (int i=0; i < 10; i++) {
imageName = [[NSString alloc] initWithFormat:#"cover_%d.jpg", i];
imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:imageName]];
UIImage *aktuellesImage = imageView.image;
UIImage *scaledImage = [aktuellesImage scaleToSize:CGSizeMake(100.0f, 100.0f)];
[(AFOpenFlowView *)self.view setImage:scaledImage forIndex:i];
[imageName release];
NSLog(#"%d is the index",i);
}
[(AFOpenFlowView *)self.view setNumberOfImages:10];
}
So you can see there 10 Images in this CoverFlowView, but how could i find out the ACTUAL picture that is in front, to use this in another view??
Could someone help me, please?
Greetings Marco

-(void)openFlowView: (AFOpenFlowView *)openFlowView imageSelected:(int)index
{
AppDelegate_iPhone *appDelegate = (AppDelegate_iPhone *)[[UIApplication sharedApplication]delegate];
db_detail = (DB_data *)[self.GalleryArray objectAtIndex:index];
appDelegate.Id = db_detail.Id;
// NSLog(#"id: value is %d",db_detail.Id);
// NSLog(#"Name vlaue is: %#",db_detail.Name);
appDelegate.title = db_detail.Name;
DetailMovieViewController *ViewController = [[DetailMovieViewController alloc]init];
[self.navigationController pushViewController:ViewController animated:YES ];
[ViewController release];
[db_detail release];
}

Related

Why is shouldStartLoadWithRequest only being invoked the first time through?

I'm trying to display a list of web pages the user can switch between in my app. I've done this successfully with documents. however, I don't want the user to be able to navigate from these pages. I found out how to do this by looking it up. The problem is that it only executes on the first page. When I switch to another page shouldStartLoadWithRequest stops working even when I go back to the first page. (This is all done with my specially designed back and forward buttons.) How can I fix this so that it will be invoked every single time and prevent the user from clicking links and navigating away from my set pages? I'm new to objective-c. All the relevant code is below. Some things were declared globally in the .h. Sorry it's kind of rough. I tabbed over only what was needed to make it into code formatting. Thanks!
My .h file:
#import <UIKit/UIKit.h>
#interface learnViewController : UIViewController <UINavigationControllerDelegate>
{
IBOutlet UIWebView *web;
UIButton *backButton;
UIButton *forButton;
}
#end
My .m file
#import "learnViewController.h"
#import "ViewController.h"
static NSString* links[] =
{
#"http://www.nlm.nih.gov/medlineplus/ency/article/000141.htm",
#"http://www.nlm.nih.gov/medlineplus/ency/article/000065.htm",
#"http://www.nlm.nih.gov/medlineplus/ency/article/001087.htm",
#"http://www.nlm.nih.gov/medlineplus/ency/article/000091.htm",
#"http://www.nlm.nih.gov/medlineplus/ency/article/007270.htm",
#"http://www.nlm.nih.gov/medlineplus/ency/article/000145.htm",
#"http://www.nlm.nih.gov/medlineplus/ency/article/000093.htm",
#"http://www.nlm.nih.gov/medlineplus/ency/article/000087.htm",
#"http://www.nlm.nih.gov/medlineplus/ency/article/000140.htm",
#"http://www.nlm.nih.gov/medlineplus/ency/article/000132.htm"
};
int numlinks = 10;
int i = 0;
#interface learnViewController ()
#end
#implementation learnViewController
- (void)viewDidLoad
{
[super viewDidLoad];
float viewWidth = self.view.frame.size.width;
float viewHeight = self.view.frame.size.height;
self.view.multipleTouchEnabled = true;
//Background
UIImageView *backgroundView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0, 0.0, viewWidth, viewHeight)];
backgroundView.image = [UIImage imageNamed:#"Background.png"];
[self.view addSubview:backgroundView];
//Show Portal
web = [[UIWebView alloc]initWithFrame:CGRectMake(0.0, viewHeight/34.0, viewWidth, (viewHeight - viewHeight/6.4))];
self->web.delegate = self;
web.scrollView.scrollEnabled = TRUE;
web.scalesPageToFit = TRUE;
[self loadDocument:links[i] inView:web];
[self.view addSubview:web];
//Buttons
UIButton *homeButton = [[UIButton alloc] initWithFrame:CGRectMake((viewWidth/2.0 - viewWidth/6.0/2.0), (viewHeight - viewHeight*280.0/2208.0/2.0 - viewWidth/6.0/2.0), (viewWidth/6.0), (viewWidth/6.0))];
[homeButton
setBackgroundImage:[UIImage imageNamed:#"Home.png"]
forState:UIControlStateNormal];
[homeButton addTarget:self action:#selector(homePressed:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:homeButton];
backButton = [[UIButton alloc] initWithFrame:CGRectMake((viewWidth/2.0/3.5 - viewWidth/9.0/2.0), (viewHeight - viewHeight*280.0/2208.0/2.0 - viewWidth/9.0/2.0), (viewWidth/9.0), (viewWidth/9.0))];
[backButton
setBackgroundImage:[UIImage imageNamed:#"Back.png"]
forState:UIControlStateNormal];
backButton.enabled = FALSE;
[backButton addTarget:self
action:#selector(backPressed:)
forControlEvents:UIControlEventTouchDown];
[self.view addSubview:backButton];
forButton = [[UIButton alloc] initWithFrame:CGRectMake((viewWidth/2.0/3.5*2.0 - viewWidth/9.0/2.0), (viewHeight - viewHeight*280.0/2208.0/2.0 - viewWidth/9.0/2.0), (viewWidth/9.0), (viewWidth/9.0))];
[forButton
setBackgroundImage:[UIImage imageNamed:#"Forward.png"]
forState:UIControlStateNormal];
[forButton addTarget:self
action:#selector(forPressed:)
forControlEvents:UIControlEventTouchDown];
[self.view addSubview:forButton];
UIButton *refButton = [[UIButton alloc] initWithFrame:CGRectMake((viewWidth - viewWidth/2.0/3.5*2.0 - viewWidth/9.0/2.0), (viewHeight - viewHeight*280.0/2208.0/2.0 - viewWidth/9.0/2.0), (viewWidth/9.0), (viewWidth/9.0))];
[refButton
setBackgroundImage:[UIImage imageNamed:#"Scale.png"]
forState:UIControlStateNormal];
[refButton addTarget:self
action:#selector(refPressed:)
forControlEvents:UIControlEventTouchDown];
[self.view addSubview:refButton];
UIButton *webButton = [[UIButton alloc] initWithFrame:CGRectMake((viewWidth - viewWidth/2.0/3.5 - viewWidth/9.0/2.0), (viewHeight - viewHeight*280.0/2208.0/2.0 - viewWidth/9.0/2.0), (viewWidth/9.0), (viewWidth/9.0))];
[webButton
setBackgroundImage:[UIImage imageNamed:#"Web.png"]
forState:UIControlStateNormal];
[webButton addTarget:self
action:#selector(webPressed:)
forControlEvents:UIControlEventTouchDown];
[self.view addSubview:webButton];
}
//Button presses
-(void)homePressed:(id)sender
{
ViewController *home = [[ViewController alloc] initWithNibName:nil bundle:nil];
[self presentViewController:home animated:YES completion:NULL];
}
- (void) refPressed:(id)sender
{
[self loadDocument:links[i] inView:web];
}
-(void)backPressed:(id)sender
{
float viewWidth = self.view.frame.size.width;
float viewHeight = self.view.frame.size.height;
if (i > 0)
{
[web removeFromSuperview];
i--;
web = [[UIWebView alloc] initWithFrame:CGRectMake(0.0, viewHeight/34.0, viewWidth, (viewHeight - viewHeight/6.4))];
[self loadDocument:links[i] inView:web];
web.scrollView.scrollEnabled = TRUE;
web.scalesPageToFit = TRUE;
[self.view addSubview:web];
forButton.enabled = TRUE;
}
if (i == 0)
{
backButton.enabled = FALSE;
}
}
-(void)forPressed:(id)sender
{
float viewWidth = self.view.frame.size.width;
float viewHeight = self.view.frame.size.height;
if (i < numlinks - 1)
{
[web removeFromSuperview];
i++;
web = [[UIWebView alloc] initWithFrame:CGRectMake(0.0, viewHeight/34.0, viewWidth, (viewHeight - viewHeight/6.4))];
[self loadDocument:links[i] inView:web];
web.scrollView.scrollEnabled = TRUE;
web.scalesPageToFit = TRUE;
[self.view addSubview:web];
backButton.enabled = TRUE;
}
if (i == numlinks - 1)
{
forButton.enabled = FALSE;
}
}
-(void)loadDocument:(NSString*)documentName inView:(UIWebView*)webView
{
NSString *url = links[i];
NSURL *nsurl = [NSURL URLWithString:url];
NSURLRequest *nsrequest = [NSURLRequest requestWithURL:nsurl];
[webView loadRequest:nsrequest];
}
-(void)webPressed:(id)sender
{
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:links[i]]];
}
-(BOOL) webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
NSURL *url = request.URL;
NSString *urlString = url.absoluteString;
NSRange range = [urlString rangeOfString:links[i]];
if (range.location != NSNotFound)
{
return YES;
}
else
{
return NO;
}
}
- (void)viewDidUnload
{
[self->web stopLoading];
self->web.delegate = nil;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
Okay, I figured it out through trial and error since no one wanted to help me. I tried looking for answers to similar questions, but nothing actually worked for me. If you're reading this and having the same problem, this is how you fix it. All you have to do is reset the web delegate to nil then back to self as so:
self.webView.delegate = nil;
self.webView.delegate = self;
I don't know why everyone else's code was so complex, and I can only speculate as to why this works. I just got lucky honestly, but I think it maybe clears the cache when you do this, thus making each page fresh to the program. That's what other people were talking about. However, their methods did not work for me either because of my lack of experience or because they do not fit my particular case. This is much simpler and is guaranteed to work as long as you make sure it does this each time you load one of your designated web pages. You're welcome if you're reading this. If anyone would so kindly as to look at my post and explain why this works in better detail, please feel free to do so!

NSOperationQueue Calling performSelectorOnMainThread crashes the application

I'm using the following code to download some pic from the server,
-(void)viewDidLoad
{
for (int i = 0 ; i < picsNames.count ; i++) {
UIImageView *imageView = [[UIImageView alloc] initWithFrame: CGRectMake(i * 320.0, 0.0, 320.0, self.view.frame.size.height)];
imageView.backgroundColor = [UIColor blackColor];
imageView.tag = IMAGE_VIEWS_TAG + i;
[scrollView addSubview:imageView];
//getting the image
NSInvocationOperation *operation = [[NSInvocationOperation alloc] initWithTarget:self selector:#selector(getImage:) object:imageView];
[queue addOperation:operation];
}
}
-(void)getImage:(UIImageView *)imageView
{
//getting the "image" from the server .....
[self performSelectorOnMainThread:#selector(loadPic:) withObject:[NSArray arrayWithObjects:imageView, image,nil] waitUntilDone:YES];
}
-(void)loadPic:(NSArray *)imageAndImageViewArray
{
//loading the image to imageview
UIImageView *imageView = (UIImageView *)[imageAndImageViewArray objectAtIndex:0];
imageView.image = (UIImage *)[imageAndImageViewArray objectAtIndex:1];
}
After loading some pictures the following line gives memory warning and crashes the app.
[self performSelectorOnMainThread:#selector(loadPic:) withObject:[NSArray arrayWithObjects:imageView, image,nil] waitUntilDone:YES];
I don't know how to solve this issue.
Thanks everyone :)
So after spending too much time on this I realized that the error is due to having too many UIImage objects alloc at the same time no the NSQueue of main NSTread.
So Just changed to code so I have only 10 UIImage objects at the time.

Mail composer didn't display under my UIWebView

I have a MainController and detailedcontroller. When I popover the Book selection and select a Book, the detailcontroller display an UIWebView with the book articles :
#interface IpadBooksViewController : UITableViewController {
SearchResult *searchResult;
IpadArticleViewController *detailController;
IpadMainViewController *mainController;
UIPopoverController *popover;
}
Into the UIWebView, I display an Email icon and catch the scheme :
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
NSURL *url = [request URL];
NSString *scheme = [url scheme];
NSString *host = [url host];
if ([[url description] hasSuffix:#"next"]) {
NSLog(#"next Show");
}
BOOL isShareLinks = [host isEqualToString:#"displayShareLinks"];
BOOL isFavoriteLinks = [host isEqualToString:#"displayFavoriteLinks"];
if ([#"myappurl" isEqualToString:scheme] && (isShareLinks || isFavoriteLinks)) {
self.selectedArticleNumber = [url.path lastPathComponent];
if (isShareLinks) {
[self sendMailArticleNumber:selectedArticleNumber];
} else if (isFavoriteLinks) {
NSLog(#"ipad favorite clicked");
[self toggleFavorite:selectedArticleNumber];
Broker *broker = [[Broker alloc] init];
[broker loadProjects:self];
[broker release];
}
}
return [super webView:webView shouldStartLoadWithRequest:request navigationType:navigationType];
}
Action is supposed to display the MFMailController under my UIWebView, but nothing is displayed without error message :
- (void) sendMailArticleNumber:(NSString *)articleNumber {
MFMailComposeViewController* composer = [[MFMailComposeViewController alloc] init];
composer.mailComposeDelegate = self;
[composer setSubject:#"Article"];
NSString *messageBody = [Article fetchBody:articleNumber bookId:bookId];
[composer setMessageBody:messageBody isHTML:YES];
[self presentModalViewController:composer animated:YES];
[composer release];
}
Any help will be welcomed. I did try creating a popover, addView atIndex without success ... Let me know if you need more code.
David
I did solve the issue by loading the controller into the delegate as following :
[((PublilexAppDelegate*)[[UIApplication sharedApplication] delegate]) sendMailArticleNumber:selectedArticleNumber bookId:self.bookId];
And then into the Delegate :
- (void) sendMailArticleNumber:(NSString *)articleNumber bookId:(NSString*)bookId {
MFMailComposeViewController* composer = [[MFMailComposeViewController alloc] init];
composer.mailComposeDelegate = self;
[composer setSubject:#"Article"];
NSString *messageBody = [Article fetchBody:articleNumber bookId:bookId];
[composer setMessageBody:messageBody isHTML:YES];
[self->navigationController presentModalViewController:composer animated:YES];
[composer release];
}
And to dismiss and comeback to the previous view :
-(void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error {
[self->navigationController dismissModalViewControllerAnimated:YES];
// [self dismissViewControllerAnimated:YES completion:nil];
// [((PublilexAppDelegate*)[[UIApplication sharedApplication] delegate]) navigateToIpadMain];
}

Proper release of UIImagePickerController

I'm a bit confused with this as I've seen way too many different variants and not sure which one is the correct way. Currently I have:
- (IBAction)pickImageFromLibrary:(id)sender
{
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:picker animated:YES];
// [picker release];
}
- (void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *image = [info objectForKey:#"UIImagePickerControllerOriginalImage"];
UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0.0f, 10.0f, 320.0f, 264.0f)];
self.studyView = imageView;
[imageView release];
[self.tableView setTableHeaderView:studyView];
self.fitImage = [ImageHelper image:image fitInView:studyView];
if (picker.sourceType == UIImagePickerControllerSourceTypeCamera)
{
UIImageWriteToSavedPhotosAlbum(image, self, #selector(image:didFinishSavingWithError:contextInfo:), nil);
}
studyView.image = self.fitImage;
[self dismissModalViewControllerAnimated:YES];
[picker release];
}
I'm allocating the UIImagePickerController in the first method but wouldn't it be logical to only release it in the 2nd method when I dismiss it?
No, because it's retained when presented modally, via presentModelViewController. This is the common pattern you'll find when presenting new view controllers, whether modally, custom view controllers or not. This is fine:
- (IBAction)pickImageFromLibrary:(id)sender
{
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:picker animated:YES];
[picker release];
}

Find assets in library - add to a AVMutableComposition - export = crash

I've been struggling with adding assets from the iPhone Photo Library to a AVMutableComposition and then export them. Here is what I got:
Finding the assets: (here I grab the AVURLAsset)
-(void) findAssets {
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
// Enumerate just the photos and videos group by using ALAssetsGroupSavedPhotos.
[library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
// Within the group enumeration block, filter to enumerate just videos.
[group setAssetsFilter:[ALAssetsFilter allVideos]];
[group enumerateAssetsUsingBlock:^(ALAsset *alAsset, NSUInteger index, BOOL *innerStop){
// The end of the enumeration is signaled by asset == nil.
if (alAsset) {
ALAssetRepresentation *representation = [alAsset defaultRepresentation];
NSURL *url = [representation url];
AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:url options:nil];
// Do something interesting with the AV asset.
[thumbs addObject:alAsset];
[assets addObject:avAsset];
}else if(alAsset == nil){
[self createScroll];
}
}];
}
failureBlock: ^(NSError *error) {
// Typically you should handle an error more gracefully than this.
NSLog(#"No groups");
}];
[library release];
}
Here I add a asset to my composition (I use the first object in the array for testing only.
-(void) addToCompositionWithAsset:(AVURLAsset*)_asset{
NSError *editError = nil;
composition = [AVMutableComposition composition];
AVURLAsset* sourceAsset = [assets objectAtIndex:0];
Float64 inSeconds = 1.0;
Float64 outSeconds = 2.0;
// calculate time
CMTime inTime = CMTimeMakeWithSeconds(inSeconds, 600);
CMTime outTime = CMTimeMakeWithSeconds(outSeconds, 600);
CMTime duration = CMTimeSubtract(outTime, inTime);
CMTimeRange editRange = CMTimeRangeMake(inTime, duration);
[composition insertTimeRange:editRange ofAsset:sourceAsset atTime:composition.duration error:&editError];
if (!editError) {
CMTimeGetSeconds (composition.duration);
}
}
And finally I export the comp and here it crashes
-(void)exportComposition {
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:composition presetName:AVAssetExportPresetPassthrough];
NSLog (#"can export: %#", exportSession.supportedFileTypes);
NSArray *dirs = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectoryPath = [dirs objectAtIndex:0];
NSString *exportPath = [documentsDirectoryPath stringByAppendingPathComponent:EXPORT_NAME];
[[NSFileManager defaultManager] removeItemAtPath:exportPath error:nil];
NSURL *exportURL = [NSURL fileURLWithPath:exportPath];
exportSession.outputURL = exportURL;
exportSession.outputFileType = AVFileTypeQuickTimeMovie;//#"com.apple.quicktime-movie";
[exportSession exportAsynchronouslyWithCompletionHandler:^{
NSLog (#"i is in your block, exportin. status is %d",
exportSession.status);
switch (exportSession.status) {
case AVAssetExportSessionStatusFailed:
case AVAssetExportSessionStatusCompleted: {
[self performSelectorOnMainThread:#selector (exportDone:)
withObject:nil
waitUntilDone:NO];
break;
}
};
}];
}
Does anyone have an idea of what it might be? It crashes on
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:composition presetName:AVAssetExportPresetPassthrough];
And I tried different presets and outputFileTypes.
Thanks
* SOLVED *
I have to answer my own question now when I have solved. It's amazing that I've been struggling with this for a whole day and then I fix it right after posting a question :)
I changed and moved:
composition = [AVMutableComposition
composition];
to:
composition = [[AVMutableComposition
alloc] init];
I think I was too tired when I was working on this yesterday. Thanks guys!

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