Category Archives: iOS

iOS

MailCore CTCoreAttachment example

July 4, 2012 Denis Kutlubaev Leave a comment

To add attachments in MailCore add this ONLY after setBody/setHTMLBody:

// Set Attachments
NSString *filePrefix = [[NSBundle mainBundle] bundlePath];
NSString *path = [NSString stringWithFormat:@"%@/%@",filePrefix,@"TestData/DSC_6201.jpg"];
NSLog(@"path:%@", path);
CTCoreAttachment *attach = [[CTCoreAttachment alloc] initWithContentsOfFile:path];
if ([attach data]==nil) {
    NSLog(@"Error: attachment data is nil");
}
[myMessage addAttachment:attach];

Here, you should add TestData folder with image to your project as a folder reference.

iOS

TWTweetComposeViewController doesn’t display initial tweet

July 2, 2012 Denis Kutlubaev Leave a comment

TWTweetComposeViewController doesn’t display tweets, that are too long. You can take a substring of a tweet by cutting down to 140 symbols:

[tweetView setInitialText:[self.textToExport substringToIndex:140]];
NSLog(@"tweetView.initialText:%@", [self.textToExport \
 substringToIndex:140]);

[tweetView setInitialText:[self.textToExport substringToIndex:140]];

NSLog(@"tweetView.initialText:%@", [self.textToExport \

substringToIndex:140]);

iOS

Apple’s Twitter framework example

July 1, 2012 Denis Kutlubaev Leave a comment

This is an example, how to integrate Twitter framework of Apple to your app.

Firstly, add Twitter (Twitter.framework) and MobileCoreServices frameworks to your app.

Then add header files to your source file:

Source code

[crayon-66452e648fc1c100758617/]

Then add this method or similar:

Source code

- (void)sendToTwitter {
useDelegate
if ([appDelegate iOSVersion5]) {
[self showErrorAlert:@"Отправка в Twitter доступна только в iOS 5 и выше."];
return;
}
tweetView = [[TWTweetComposeViewController alloc] init];
TWTweetComposeViewControllerCompletionHandler
completionHandler =
^(TWTweetComposeViewControllerResult result) {
switch (result)
{
case TWTweetComposeViewControllerResultCancelled: {
NSLog(@"Twitter Result: canceled");
[self showErrorAlert:@"Отправка в Twitter отменена."];
break;
}
case TWTweetComposeViewControllerResultDone: {
NSLog(@"Twitter Result: sent");
[self showErrorAlert:@"Отправка в Twitter выполнена."];
break;
}
default: {
NSLog(@"Twitter Result: default");
[self showErrorAlert:@"Отправка в Twitter не выполнена."];
break;
}
}
[self dismissModalViewControllerAnimated:YES];
};
[tweetView setCompletionHandler:completionHandler];
[tweetView setInitialText:self.textToExport];
[self presentModalViewController:tweetView animated:YES];
}

Here, firstly iOS version is checked, because it will work only in iOS 5 or later. Then, I create TWTweetComposeViewController instance, it’s block completion handler, set text to export to Twitter and then present controller as a modal controller.

iOS

How to check iOS version programmatically

July 1, 2012 Denis Kutlubaev Leave a comment

To check the iOS version you can use the following method:

- (BOOL)iOSVersion5 {
    NSLog(@"System Version is %@", \
[[UIDevice currentDevice] systemVersion]);
    NSString *ver = [[UIDevice currentDevice] systemVersion];
    float ver_float = [ver floatValue];
    if (ver_float < 5.0) {
        return NO;
    }
    else {
        return YES;
    }
}

- (BOOL)iOSVersion5 {

NSLog(@"System Version is %@", \

[[UIDevice currentDevice] systemVersion]);

NSString *ver = [[UIDevice currentDevice] systemVersion];

float ver_float = [ver floatValue];

if (ver_float < 5.0) {

return NO;

}

else {

return YES;

}

iOS

Deleting from Core Data

June 30, 2012 Denis Kutlubaev Leave a comment

Deleting objects from Core Data should not be recognized as deleting rows from SQLite table. It is like deleting objects from Object Graph. This is an example of deleting all rows for the current file number. I retrieve all NSManagedObject objects and delete them in cycle.

Source code

+ (BOOL)deleteScrollPositionsForFileNumber:(NSInteger)fileNumber {
    BOOL success;
    useDelegate
    NSManagedObjectContext *context = appDelegate.managedObjectContext;
    if (context == nil) {
        NSLog(@"Error: No context");
        success = NO;
        return success;
    }
    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"fileNumber == %d", fileNumber];
    NSEntityDescription *entity = [NSEntityDescription entityForName:@"ScrollPosition" inManagedObjectContext:context];
    [fetchRequest setEntity:entity];
    [fetchRequest setPredicate:predicate];
    NSError *error = nil;
    NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error];
    NSLog(@"Number of deleted objects: %d", [fetchedObjects count]);
    for (NSManagedObject *object in fetchedObjects) {
        [context deleteObject:object];
    }
    success = YES;
    return success;
}

iOS

Change MBProgressHUD color

June 30, 2012 Denis Kutlubaev 1 Comment

To change the background color of MBProgressHUD comment this line and add this in MBProgressHUD.m in drawRect method:

    //CGContextSetGrayFillColor(context, 0.0f, self.opacity);
    CGFloat fillColor[4]    = {0.0,0.0,1.0,1.0};
    CGContextSetFillColor(context, fillColor);

//CGContextSetGrayFillColor(context, 0.0f, self.opacity);

CGFloat fillColor[4] = {0.0,0.0,1.0,1.0};

CGContextSetFillColor(context, fillColor);

This code changes HUD color to blue.

iOS

Reload UITableView cells

June 30, 2012 Denis Kutlubaev Leave a comment

Sometimes it’s needed to reload only some of the rows of UITableView to save some time and energy and not reload whole the table. This is how it can be done:

NSIndexPath * indexPath = \
   [NSIndexPath indexPathForRow:row inSection:0]; 
[self.tableView reloadRowsAtIndexPaths: \
   [NSArray arrayWithObject:indexPath] \
   withRowAnimation:UITableViewRowAnimationMiddle];

NSIndexPath * indexPath = \

[NSIndexPath indexPathForRow:row inSection:0];

[self.tableView reloadRowsAtIndexPaths: \

[NSArray arrayWithObject:indexPath] \

withRowAnimation:UITableViewRowAnimationMiddle];

iOS

Save current position in UIScrollView and then scroll to this position

June 28, 2012 Denis Kutlubaev Leave a comment

To save a position of the current scroll view use this method:

- (void)savePosition {
    positionY = webView.scrollView.contentOffset.y;
    NSLog(@"positionY:%d", positionY);
}

- (void)savePosition {

positionY = webView.scrollView.contentOffset.y;

NSLog(@"positionY:%d", positionY);

}

To scroll programmatically to the saved position use this method:

- (void)scrollToYPosition:(int)positionY {
    [self.webView.scrollView setContentOffset: \
CGPointMake(self.webView.scrollView.contentOffset.x, positionY)];
}

- (void)scrollToYPosition:(int)positionY {

[self.webView.scrollView setContentOffset: \

CGPointMake(self.webView.scrollView.contentOffset.x, positionY)];

}

iOS

How to build MailCore framework on iOS

June 25, 2012 Denis Kutlubaev Leave a comment

MailCore is a Cocoa e-mail framework built by Matt Ronge that is the core of the e-mail client Kiwi. MailCore provides a nice set of objects for working with IMAP, MIME and SMTP, all of which use the C e-mail library LibEtPan. Here is some short information about MailCore. This is short documentation on MailCore from Matt Ronge. Official website is here.

To make it run on your iOS simulator, do the following:

Download MailCore from GitHub:

Default

git clone https://github.com/mronge/MailCore.git cd MailCore/ git submodule init git submodule update

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git clone https://github.com/mronge/MailCore.git
cd MailCore/
git submodule init
git submodule update
Build m4, autoconf, automake, libtool on Mac OS X Lion using this post.
Run update.sh script in MailCore to build and install everything before opening it in Xcode. If you don’t know, how to run shell scripts, read this

Open MessageSender project in MailCore library. Select MessageSender to build. It will not do anything. To make it sending a test message write the following code in ViewDidLoad:

CTCoreMessage myMessage = [[CTCoreMessage alloc] init];
    
// Set To
CTCoreAddress *addrTo1 = [CTCoreAddress address];
[addrTo1 setEmail:@"Your E-mail1"];
CTCoreAddress *addrTo2 = [CTCoreAddress address];
[addrTo2 setEmail:@"E-mail2"];
/*CTCoreAddress *addrTo3 = [CTCoreAddress address];
[addrTo3 setEmail:@"E-mail3"];*/
[myMessage setTo:[NSSet setWithObjects:addrTo1, addrTo2, nil]];
  
// Set From 
CTCoreAddress *addrFrom = [CTCoreAddress address];
[addrFrom setEmail:@"Your E-mail"];
[addrFrom setName:@"Your Name"];
[myMessage setFrom:[NSSet setWithObject:addrFrom]];
   
[myMessage setSubject:@"Test Mail Core"];
[myMessage setHTMLBody:@"This is a test HTML message"];
   
[CTSMTPConnection sendMessage:myMessage \
server:@"smtp.mail.ru" username:@"YourUserName" \
password:@"YourPassword" port:587 useTLS:YES useAuth:YES];

CTCoreMessage myMessage = [[CTCoreMessage alloc] init];

// Set To

CTCoreAddress *addrTo1 = [CTCoreAddress address];

[addrTo1 setEmail:@"Your E-mail1"];

CTCoreAddress *addrTo2 = [CTCoreAddress address];

[addrTo2 setEmail:@"E-mail2"];

/*CTCoreAddress *addrTo3 = [CTCoreAddress address];

[addrTo3 setEmail:@"E-mail3"];*/

[myMessage setTo:[NSSet setWithObjects:addrTo1, addrTo2, nil]];

// Set From

CTCoreAddress *addrFrom = [CTCoreAddress address];

[addrFrom setEmail:@"Your E-mail"];

[addrFrom setName:@"Your Name"];

[myMessage setFrom:[NSSet setWithObject:addrFrom]];

[myMessage setSubject:@"Test Mail Core"];

[myMessage setHTMLBody:@"This is a test HTML message"];

[CTSMTPConnection sendMessage:myMessage \

server:@"smtp.mail.ru" username:@"YourUserName" \

password:@"YourPassword" port:587 useTLS:YES useAuth:YES];

Use this method to retrieve message subjects from Inbox of your mail:

- (IBAction)retrieveClicked:(id)sender {
    CTCoreAccount *account = [[CTCoreAccount alloc] init];
    [account connectToServer:@"imap.yandex.ru" port:143 \
 connectionType:CONNECTION_TYPE_PLAIN authType:IMAP_AUTH_TYPE_PLAIN \
 login:@"YOUR USERNAME" password:@"YOUR PASSWORD"];
    
    NSSet *subFolders = [account subscribedFolders];
    
    CTCoreFolder *inbox = [account folderWithPath:@"INBOX"];
    
    NSSet *messageList = [inbox messageObjectsFromIndex:1 \
 toIndex:0];
    
    for (CTCoreMessage *message in messageList) {
        NSLog(@"%@", [message subject]);
    }
}

- (IBAction)retrieveClicked:(id)sender {

CTCoreAccount *account = [[CTCoreAccount alloc] init];

[account connectToServer:@"imap.yandex.ru" port:143 \

connectionType:CONNECTION_TYPE_PLAIN authType:IMAP_AUTH_TYPE_PLAIN \

NSSet *subFolders = [account subscribedFolders];

CTCoreFolder *inbox = [account folderWithPath:@"INBOX"];

NSSet *messageList = [inbox messageObjectsFromIndex:1 \

toIndex:0];

for (CTCoreMessage *message in messageList) {

NSLog(@"%@", [message subject]);

}

Official MailCore website.

iOS

What’s new in iOS 6: developer-related features

June 21, 2012 Denis Kutlubaev Leave a comment

This is the link for Apple Developers.

Brief content (developer-related features):

iOS 6.0

Maps
In addition to the new map tiles provided by Apple, the Maps app and MapKit framework now support additional interactions with other apps.

Social Framework
The Social framework (Social.framework) provides a simple interface for accessing the user’s social media accounts.

Pass Kit
Pass Kit is a new technology that uses web services, a new file format, and an Objective-C framework (PassKit.framework) to implement support for downloadable passes.

Game Center
Game Center has been updated and new features have been added to improve the game playing experience.

Reminders
The Event Kit framework now includes interfaces for creating and accessing reminders on the user’s device.

In-App Purchase
The Store Kit framework (StoreKit.framework) now supports the purchasing of iTunes content inside your app and provides support for having downloadable content hosted on Apple servers

Collection Views
The UICollectionView class offers a new way to present ordered data to users. With a collection view object, you are now able to define the presentation and arrangement of embedded views

UI State Preservation
State preservation makes it easier for apps to restore their user interface to the state it was in when the user last used it.

Auto Layout
Auto layout improves upon the “springs and struts” model previously used to lay out the elements of a user interface. With auto layout, you define rules for how to lay out the elements in your user interface.

Data Privacy
In addition to location data, the system now asks the user’s permission before allowing third-party apps to access certain user data

Additional Framework Enhancements

Alwawee

Category Archives: iOS

MailCore CTCoreAttachment example

TWTweetComposeViewController doesn’t display initial tweet

Apple’s Twitter framework example

How to check iOS version programmatically

Deleting from Core Data

Change MBProgressHUD color

Reload UITableView cells

Save current position in UIScrollView and then scroll to this position

How to build MailCore framework on iOS

What’s new in iOS 6: developer-related features

iOS Development