9. "Aligning UIToolbar items"

   //Add two UIBarButtonSystemItemFlexibleSpace items to your toolbar, to the left and right of your items

    

   UIBarButtonItem *flexibleSpaceLeft = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

   UIBarButtonItem *flexibleSpaceRight = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

   [toolbar setItems:[NSArray arrayWithObjects:flexibleSpaceLeft, settingsButton,deleteButton,aboutButton, flexibleSpaceRight, nil]];

   [flexibleSpaceLeft release];

   [flexibleSpaceRight release];

    

   //Adding ...

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10. "New project"

    As you can see I was not posting much code lately. I was working on my scientific project http://brumboom.com/.

    I worked on AI engine to divide users on groups using their answers if they like image or not. Based on prev image -- new image is showing.

    It is ...

    read more

11. "Convert UIImage to NSData"

    UIImage *img = [UIImage imageNamed:@"some.png"];

    NSData *dataObj = UIImageJPEGRepresentation(img, 1.0);

    read more

12. "Make a phone call from runtime"

    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel:1-800-111-1111"]];

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13. "How to terminate an application"

    //But you need to understand that this is against "iPhone Human Interface Guidelines"

    exit(0);

    
    

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14. "Get screen/application/status bar frame dimensions"

    CGRect rect;

    // Get screen dimensions

    rect = [[UIScreen mainScreen] bounds];

    NSLog(@"Bounds: %1.0f, %1.0f, %1.0f, %1.0f", rect.origin.x, rect.origin.y, rect.size.width, rect.size.height);

    // Get application frame dimensions (basically screen - status bar)

    rect = [[UIScreen mainScreen] applicationFrame];

    NSLog(@"App Frame: %1.0f, %1.0f ...

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15. "NSDictionary - read/write"

     

    // you should add empty file "hiscores" in your xCode project

     - (void)save{

    NSLog(@"saving...");

      NSDictionary *hiscores;

     

    //adding object and keys;

    //...

    //...

     

    NSString *writableFilePath = [self createEditableCopyOfFileIfNeeded:[NSString stringWithString:@"hiscores"]];

    if (![hiscores writeToFile:writableFilePath atomically:YES]){

    NSLog(@"WRITE ERROR");

    } 

     }

     

    - (void)load{

    NSLog(@"loading...");

    NSString *writableFilePath = [self createEditableCopyOfFileIfNeeded:[NSString stringWithString:@"hiscores"]];

    hiscores = [NSDictionary arrayWithContentsOfFile ...

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16. "Check if email is valid"

    #import "GTMRegex.h"

     

    //Check if email is valid

    //You need to include attached files into your project 

    //We are using regular expressions in this method

    -(BOOL)isEmailValid:(NSString *)email {

    BOOL isValid = YES;

    NSString *emailRegEx = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";

    GTMRegex *regex = [GTMRegex regexWithPattern:emailRegEx];

    if(([regex matchesString:email]) == YES ...

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17. "Randomize"

    -(int)randomInRange:(NSRange)range except:(NSArray*)exceptionArray{

    int r ;

    BOOL isSame = TRUE;

    while (isSame) {

    isSame = FALSE;

    r = rand() % range.length + range.location;

    for (NSNumber *number in exceptionArray) {

    if([number intValue] == r){

    isSame = TRUE;

    break;

    }

    }

    }

    return r;

    }

     

    //

     

    [self randomInRange:NSMakeRange(1, 10) except:[NSArray arrayWithObjects:[NSNumber numberWithInt:2],[NSNumber numberWithInt:1 ...

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18. "How hide keyboard on return key for UITextView"

    -(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text

    {

    if([text isEqualToString:@"\n"])

    {

    [textView resignFirstResponder];

    return NO;

    }

    return YES;

    }

    read more

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