Application crashes while using SDWebImageCache in IOS 9 in tableview - objective-c

i am using SDWebImageCache for loading thumbnail images in UITableview custom cell. But in ios 9 the application crashes when i scroll the UITable. Similar is the case with AFNetworking too(UIIMageView + AFNetworking) class.
The class which i used from SDWebImageCache is:
[cell.imgMain sd_setImageWithURL:imageLoadUrl
placeholderImage:[UIImage imageNamed:#"*placeholder image*"]
options:SDWebImageRefreshCached];
The class which i used from UIIMageView + AFNetworking is:
[cell.imgMain setImageWithURLRequest:[NSURLRequest requestWithURL:imageUrl]
placeholderImage:[UIImage imageNamed:#"wachizLogoIcon.png"]
success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {
cell.imgMain.image=image;
}
failure:nil];
But still the application crashes and shows the following screen:
APPLICATION CRASHES IN IOS 9 and sometimes for IOS 8.4
Please help me from this situation. Lots of pressure ...

use this code
NSMutableArray *Imagedata;
-
NSString *Banner = [NSString stringWithFormat:#"%#",[[imagedata valueForKey:#""]]objectAtIndex:indexpath.row];
NSLog(#"%#",Banner);
[cell.imgMain sd_setImageWithURL:[NSURL URLWithString:Banner] placeholderImage:[UIImage imageNamed:#"placehoder2.jpg"]];

I faced similar issue once. It was basically a low memory crash when the SDWebImageCache tries to cache images. Try implementing didReceiveMemoryWarning methods to debug it. Reset the cache on low memories. Also set a maxCacheSize for your images.
These methods didn't worked out well for me so i switched to Haneke. Still I had to set diskCapacity to a certain limit.

When u cache an image this will store in your device RAM... please check your RAM in debugger...if you cache lots of image this will terminate app due to Memory warning.

Use this
add code to Appdelegate
- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application
{
NSLog(#"Clearing cache-------------");
[[SDImageCache sharedImageCache] clearMemory];
[[SDImageCache sharedImageCache] cleanDisk];
[[SDImageCache sharedImageCache] clearDisk];
[[SDImageCache sharedImageCache] setValue:nil forKey:#"memCache"];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"cache cleared"
message:Nil
delegate:Nil
cancelButtonTitle:#"Cancel"
otherButtonTitles:nil];
[alert show];
}

Related

How to create a QR Code reader for iOS

I am developing an app for our local business. I already have the live camera in a UIImageView, now I need to know how to read QR codes from the UIImageView and display the content (0000-KKP0-2013) in a label.
So basically I need a QR code scanner which is reading a QR code and save the content in a String. I already used ZXing ("Zebra Crossing") but it is not compatible with iOS 6 and it won't work. Is there an easy code for getting the QR Code content in a String?
Thank you!
This is the code I am using in my .m file:
#import "ZBarSDK.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize vImagePreview;
- (void)viewDidUnload
{
[super viewDidUnload];
vImagePreview = nil;
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
//----- SHOW LIVE CAMERA PREVIEW -----
AVCaptureSession *session = [[AVCaptureSession alloc] init];
session.sessionPreset = AVCaptureSessionPreset352x288;
/*CALayer *viewLayer = self.vImagePreview.layer;
NSLog(#"viewLayer = %#", viewLayer);*/
AVCaptureVideoPreviewLayer *captureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session];
captureVideoPreviewLayer.frame = self.vImagePreview.bounds;
[self.vImagePreview.layer addSublayer:captureVideoPreviewLayer];
AVCaptureDevice *device = [self frontCamera];
NSError *error = nil;
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error];
if (!input) {
// Handle the error appropriately.
NSLog(#"ERROR: trying to open camera: %#", error);
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:#"QReader"
message:[NSString stringWithFormat:#"ERROR: Versuch die Kamera zu öffnen ist fehlgeschlagen [%#]",error]
delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
alert.tag = 1;
[alert show];
}
[session addInput:input];
[session startRunning];
}
- (AVCaptureDevice *)frontCamera {
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for (AVCaptureDevice *device in devices) {
if ([device position] == AVCaptureDevicePositionFront) {
return device;
}
}
return nil;
}
Now I need to know how to read the QR code from the vImagePreview with the ZBarSDK. And I cant use a UIPickerView
Try ZBar: http://zbar.sourceforge.net/iphone/sdkdoc/install.html
We are using it successfully in our application which supports iOS 4 up to iOS 6.1
In my case I use ZBarReaderView - to see a camera preview, which automatically detects and returns scanned code.
You'll need:
#import "ZBarSDK.h"
ZBarReaderView *readerView;
add this : <ZBarReaderViewDelegate>
and then:
[readerView.scanner setSymbology:ZBAR_QRCODE config:ZBAR_CFG_ENABLE to:0];
readerView.readerDelegate = self;
[readerView start];
- (void)readerView:(ZBarReaderView *)view didReadSymbols: (ZBarSymbolSet *)syms fromImage:(UIImage *)img
{
for(ZBarSymbol *sym in syms)
{
NSLog(#"Did read symbols: %#", sym.data);
}
}
Anyways, just follow these instructions:
http://zbar.sourceforge.net/iphone/sdkdoc/tutorial.html
and then try it out - see if it works for You.
EDIT
Here I uploaded example project I took from here: https://github.com/arciem/ZBarSDK
It has enabled front facing camera. Tested - successfully reads qr code using front facing camera:
http://www.speedyshare.com/fkvqt/download/readertest.zip
or
Once application starts - front camera is shown - scanner is 200x200 large and as a subview.
http://www.speedyshare.com/QZZU5/download/ReaderSample-v3.zip
We looked into this not long ago. ZBar looks good, but it's LGPL-licensed, which is not suitable for use on the App Store. In the end I went with ZXingObjC.
if you want to test the qr codes here are some apps for iphone that might come in handy. iphone qr scanner
OP was looking for something that supported iOS6 two years ago, but for anyone else coming along, this one that I went with wraps the built-in iOS7 functionality:
https://github.com/mikebuss/MTBBarcodeScanner
Anyone looking to implement this in Swift. Check this out:
https://github.com/aeieli/swiftQRCode
Need to change a few syntax errors, otherwise fully working on iOS 8.1
Check this out with apple natively implemented Qr code

App crashes when using AHAlertView project

I'm trying to display a custom UIAlertView and I'm using AHAlertView:
https://github.com/warrenm/AHAlertView
I added both AHAlertView.m and .h to my project and add the following to the viewDidLoad method:
NSString *title = #"Alert View Title";
NSString *message = #"This is a message that might prompt you to do something.";
AHAlertView *alert = [[AHAlertView alloc] initWithTitle:title message:message];
__weak AHAlertView *weakAlert = alert;
[alert setCancelButtonTitle:#"Cancel" block:^{
weakAlert.dismissalStyle = AHAlertViewDismissalStyleTumble;
}];
[alert addButtonWithTitle:#"OK" block:^{
weakAlert.dismissalStyle = AHAlertViewDismissalStyleZoomDown;
}];
[alert show];
The problem is when I'm tapping either one of the buttons, the app crashes with:
"Application windows are expected to have a root view controller at the end of application launch"
I don't know what I did wrong, I looked at the sample project and this is the way the alert is being used.
How can I implement it correctly?
Did you activate -fno-objc-arc option ? If you did, deactivate it, AHAlertView support ARC

MFMailComposeViewController dismisses right away

The situation is the MFMailComposeViewController was going to be presented. I saw it was presented half-way done, but then it got dismissed.
This is the error:
_serviceViewControllerReady:error: Error Domain=_UIViewServiceInterfaceErrorDomain Code=3 "The operation couldn’t be completed. (_UIViewServiceInterfaceErrorDomain error 3.)"
This is my source code to present the MFMailComposeViewController:
-(void) MailExecute {
if ([MFMailComposeViewController canSendMail])
{
MFMailComposeViewController *mailViewController = [[MFMailComposeViewController alloc] init];
mailViewController.mailComposeDelegate = self;
[mailViewController setSubject:NSLocalizedString(#"Check this new look", #"")];
[mailViewController setMessageBody: #"my new look" isHTML:YES];
[self presentModalViewController:mailViewController animated:YES];
[mailViewController release];
}
else
{
UIAlertView *alertInternal = [[UIAlertView alloc]
initWithTitle: NSLocalizedString(#"Notification", #"")
message: NSLocalizedString(#"You have not configured your e-mail client.", #"")
delegate: nil
cancelButtonTitle:NSLocalizedString(#"OK", #"")
otherButtonTitles:nil];
[alertInternal show];
[alertInternal release];
}
}
The weird point is that sometimes it happens, sometimes it doesn't.
Please help me on this! I spend almost 1 working day to resolve this but no succeed.
This problem can occur when displaying a remote view controller -- a view controller run in another process -- as indicated by the UIViewService reference in the error message.
I've had this problem when displaying an SKStoreProductViewController, which is also a remote view controller. I'm not sure what the root cause is; the only thing that seemed to trigger it for me was presenting the view controller repeatedly.
For the SKStoreProductViewController I was able to check for this error in the completion block of the loadProductWithParameters:completionBlock: method. Does the MFMailComposeViewControllerDelegate give you a callback with an error about this? It may be that all you can do is listen for this error and show an error message to the user.
We should both probably file an apple radar about this.
Your code looks correct, and as stated the error message strongly suggests this has something to do with UIView proper (not MFMail specifically). The problem almost surely lies somewhere elsewhere within your code, and might be challenging to troubleshoot.
Some things to look for:
Other animations or view controller transitions/dismissals happening simultaneously or incorrectly (possibly like this)
Release/retain issues, of course
If none of that seems like the fix, try commenting-out everything else happening in the view controller that calls this method and see if it works then.
If you still can't get it working, present the simplest version you can of failing code so we can troubleshoot further. :)
Do you have anything in your viewDidDisappear: or viewWillDisappear methods that would dismiss a view controller?
If not, can you post more of your code for the ViewController that presents the MFMailComposeViewController?
I know this is the late reply, but may be help some other.
Just now face the same problem, By resetting the simulator work fine for me for this same issue. Let me know if this helps.
After I stored the MFMailComposeViewController in a strong property of my class instead of a local variable I could not reproduce the self-dismissing behaviour any more.
The issue for me was an incorrect argument when calling the attachment function. If you are having this issue with an email attachment I suggest following the solution found in this thread, as follows:
NSString *path = [self getDatabaseFilePath];
NSData *myData = [NSData dataWithContentsOfFile:path];
[picker addAttachmentData:myData mimeType:#"application/x-sqlite3" fileName:[path lastPathComponent]];
MFMailComposeViewController *mailComposer = [[MFMailComposeViewController alloc]init];
if ([MFMailComposeViewController canSendMail])
{
mailComposer.mailComposeDelegate = self;
[mailComposer setToRecipients:[NSArray arrayWithObject:#"support#kapsie.com"] ];
[mailComposer setSubject:#"Kapsie App Contact Support"];
[mailComposer setMessageBody:#"Type Your Feedback message here" isHTML:NO];
[self presentViewController:mailComposer animated:YES completion:nil];
}
Use above code and check it on device.
Use of modelViewController is deprecated in iOS 6 ,
use
[self presentViewController:mailView animated:YES completion:nil];
I face the same problem and the solution was:
I delete the overall application appearence related code like
[[UILabel appearance]setText:#""]
and replace with the code
[[UILabel appearanceWhenContainedIn:[self class], nil] setText:#""];
Now it is working fine so be carefull on overall application appearence changes: it might be navigationbar appearance, so and so

Custom iOS UILocalNotification sound does not play (possibly related to Xcode update)

I'm trying to get a custom sound working on a UILocalNotification, and I'm just getting no sound at all. If I use UILocalNotificationDefaultSoundName, I indeed get the default sound, but when the custom sound is specified, there is no sound, just the message. The sound is less than 30 seconds and it's in the right format, as far as I can tell. Here's a screenshot of the file info:
I've inspected the .app directory in XCode's DerivedData directory, and the alarm.caf file is at the root of the app, which I believe means it's in the bundle (right?).
I'm pretty sure this was working a while ago, and I've since upgraded Xcode. Maybe that is a hint?
I've also tried deleting/reinstalling/rebooting as mentioned in other answers. As you can see, I'm calling cancelAllLocalNotifications first.
Does anyone have any idea what could be wrong?
[[UIApplication sharedApplication] cancelAllLocalNotifications];
NSLog(#"installing alarm");
[arguments pop]; // name
[arguments pop]; // title
alarm.alertBody = [arguments pop];
alarm.fireDate = [[NSDate date] addTimeInterval:[[arguments pop] intValue]/1000];
//alarm.soundName = UILocalNotificationDefaultSoundName;
alarm.soundName = #"alarm.caf";
[[UIApplication sharedApplication] scheduleLocalNotification:alarm];
Your code seems to be good.
Try to clean your project, uninstall your app from your device/simulator, then re-install it. It could help maybe :)
I don't know the reason (and I didn't read documentation too), I just turned on the action property notification setHasAction:YES and the sound began to play.
please make sure that the iPhone is not in silent mode( because your code seems to be good )
just check the button on the side of your iPhone
Ok, so here's what happened. I forgot how the app handles the notification itself if it is still running. My code was only displaying a UIAlertView and not playing the sound. I'm not sure why it worked with the default sound. In any case, I added code like this to my AppDelegate:
- (void)application:(UIApplication *)application
didReceiveLocalNotification:(UILocalNotification *)notification
{
NSLog(#"didReceiveLocalNotification");
if (application.applicationState == UIApplicationStateActive) {
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"MarkMyTime"
message:notification.alertBody
delegate:self cancelButtonTitle:#"OK"
otherButtonTitles:nil];
NSString *soundFilePath = [[NSBundle mainBundle]
pathForResource:notification.soundName ofType:nil];
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: soundFilePath];
AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL: fileURL error: nil];
[fileURL release];
player.delegate = self;
[player prepareToPlay];
[player play];
[alertView show];
if (alertView) {
[alertView release];
}
}
}
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag
{
NSLog(#"Releasing player");
[player release];
}
This will show a UIAlertView and play the sound on the notification object. You also need to add the AVAudioPlayerDelegate interface to the AppDelegate to be able to assign the delegat to the player. I think if you are using ARC, this code could be simplified a bit.
#interface AppDelegate : PhoneGapDelegate <AVAudioPlayerDelegate> {
I'm not sure if this is the best approach, so feel free to chime in with any improvements.
Maybe you do not add the sound file (*.caf) in Xcode project: Build Phases/Copy Bundle Resources.
Your code is good, but check your iPhone setting
setting -> Notification center -> Your App -> Sound - > "On"
the sound should be "On".
So, to enable this, checked Inter App Audio at Capabilities in Targets of the application and it was Off Capabilities in Inter-app audio
change this to On.
Then local notification sound is working.

iPod - Let the native music app to play sound in background

I am building an application for iPod.
When running it, the native iPod music app should continue play in background, but this is not happening.
I think it might have something to do with the sound that it is played by my app. For playing a short sound at a certain point, I am using AVAudioPlayer. The code looks like this:
NSString *path = [[NSBundle mainBundle] pathForResource:#"sound" ofType:#"mp3"];
NSLog(#"%#", path);
player = [[AVAudioPlayer alloc] initWithData:[NSData dataWithContentsOfFile:path] error:nil];
[player prepareToPlay];
[player play];
Could this interfere with the native music player on iPod?
And another thing. In my app, I have integrated AdWhirl and it appears to use AudioToolbox.
Thanks a lot,
George
You must set up your AVAudioSession to use the Ambient category. This tells the system that your sound should blend with any already playing sound. The best way to do this in iOS 4 is in the app delegate, like this:
- (void)applicationDidFinishLaunching:(UIApplication *)application {
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryAmbient error:nil];
// ...
}
- (void)applicationDidBecomeActive:(UIApplication *)application {
// reactivate audio session
[[AVAudioSession sharedInstance] setActive: YES error: nil];
}
Read up on Audio Sessions. If your app produces sound, you always want be conscious of and in control of your audio session.