Macport installing sudo: port: command not found

While installing the Macport on your mac, if you happen to find following error:
sudo: port: command not found

Following lines are useful to run before you do sudo port -v selfupdate.
as a result, above error will be gone.


export PATH=$PATH:/opt/local/bin
export MANPATH=$MANPATH:/opt/local/share/man
export INFOPATH=$INFOPATH:/opt/local/share/info

source

How to find if NSString contains decimal + certain other characters.

NSMutableCharacterSet *_mySet = [NSMutableCharacterSet characterSetWithCharactersInString:@"aAfF"];

[_mySet formUnionWithCharacterSet:[NSCharacterSet decimalDigitCharacterSet]];

NSCharacterSet *myStringSet = [NSCharacterSet characterSetWithCharactersInString:mystring];

if ([_mySet isSupersetOfSet: myStringSet])

{

//This is will be true if myString contains ONLY " decimal numbers(0-9) and characters a,A,f,F"

        

}

Note: First 2 code lines tell you how to join 2 character sets.

How to check if NSString contains only numbers.

NSCharacterSet *_NumericOnly = [NSCharacterSet decimalDigitCharacterSet];

NSCharacterSet *myStringSet = [NSCharacterSet characterSetWithCharactersInString:mystring];

    

if ([_NumericOnly isSupersetOfSet: myStringSet])

{

    //String entirely contains decimal numbers only.

   

        

}

How to capitalize first letter of NSString ?

NSString *myString = @"i want first letter capitalized.";

NSString *newString = [myString stringByReplacingCharactersInRange:NSMakeRange(0,1) withString:[[myString substringToIndex:1] capitalizedString]];

sdsad

This will give output of newString as  I want first letter capitalized

Fetch address for a contact from addressbook.

    ABMultiValueRef multi = ABRecordCopyValue(person, kABPersonAddressProperty);

    

    if(multi)

    {

        NSArray *address = (NSArray *)ABMultiValueCopyArrayOfAllValues(multi);

        for (int i = 0; i < [address count]; i++) {

        {

            NSDictionary *addressDict=[address objectAtIndex:i];

            NSString *country = [addressDict objectForKey:(NSString *)kABPersonAddressCountryKey];

            NSString *zip = [addressDict objectForKey:(NSString *)kABPersonAddressZIPKey];

            NSString *city = [addressDict objectForKey:(NSString *)kABPersonAddressCityKey];

            NSString *street = [addressDict objectForKey:(NSString *)kABPersonAddressStreetKey];

            

        }

    }

Similarly, you can fetch phone numbers as well as email address and other details by changing property kABPersonAddressProperty to corresponding property.

How to append phone number to an existing contact.

    //We need to create a mutable copy of ABMultiValueRef with property kABPersonPhoneProperty

    

    ABMultiValueRef Phones = ABRecordCopyValue(contact, kABPersonPhoneProperty);

    ABMutableMultiValueRef Phone = ABMultiValueCreateMutableCopy(Phones);

    ABMultiValueAddValueAndLabel(Phone,@"413-675-1234", kABOtherLabel, NULL);

    ABMultiValueAddValueAndLabel(Phone, @"413-675-1235", kABOtherLabel, NULL); 

    ABRecordSetValue(contact, kABPersonPhoneProperty, Phone,nil);

    CFRelease(Phone);

    //This will add 2 numbers with others title under phone section of contact.

    //You can use other label too like following kABWorkLabel or kABPersonPhoneMobileLabel 

    ABMultiValueAddValueAndLabel(Phone,@"413-675-1234", kABPersonPhoneMobileLabel, NULL);

    ABMultiValueAddValueAndLabel(Phone, @"413-675-1235", kABWorkLabel, NULL); 

    //Dont forget to save your addressbook after that.

    ABAddressBookSave(addressbook, &error);

    if (error != NULL) 

    {

        NSLog(@"failed");

    }

      NSLog(@"success.");

Note: If you don't make a  mutable copy, you will get following error for trying add  phone number to ABMultiValueRef instead of ABMutableMultiValueRef. As you created ABMultiValueRef by copying from ABRecordRef using method ABRecordCopyValue.

Assertion failed: (((ABCMultiValue *)multiValue)->flags.isMutable), function ABMultiValueAddValueAndLabel

Remove contact from address book

Remove a record from address book.

ABAddressBookRef addressbook = ABAddressBookCreate();

ABAddressBookRemoveRecord(addressbook, record, nil);

ABAddressBookSave(addressbook, nil);

CFRelease(addressbook);

----------------------------------------------------------------------------------------

Remove  record(s) from address book with specific name.

ABAddressBookRef addressbook = ABAddressBookCreate();

CFStringRef nameRef = (CFStringRef)[NSString stringWithFormat:@"%@ %@", @"Davis", @"Scott"];

CFArrayRef  AllRecords_ = ABAddressBookCopyPeopleWithName(addressbook, nameRef);

if (AllRecords_ != NULL) 

{

    int count = CFArrayGetCount(AllRecords_);          

    for (int i = 0; i < count; ++i) 

    {                

           ABRecordRef contact = CFArrayGetValueAtIndex(AllRecords_, i);

           ABAddressBookRemoveRecord(addressbook, contact, nil);

    }

    

}

ABAddressBookSave(addressbook, nil);

CFRelease(addressbook);

Add new contact in address book

    CFErrorRef error = NULL;

    ABAddressBookRef iPhoneAddressBook = ABAddressBookCreate();

    ABRecordRef newPerson = ABPersonCreate();

    ABRecordSetValue(newPerson, kABPersonFirstNameProperty,@"Davis", &error);

    ABRecordSetValue(newPerson, kABPersonLastNameProperty, @"Scott", &error);

    

    

    //Add my phone number

    ABMutableMultiValueRef PhoneVar = ABMultiValueCreateMutable(kABMultiStringPropertyType);

    ABMultiValueAddValueAndLabel(PhoneVar,valueForKey:@"6176352360", kABPersonPhoneMainLabel, NULL);

    ABRecordSetValue(newPerson, kABPersonPhoneProperty, PhoneVar,nil);

    CFRelease(PhoneVar);

    

    

    //Add my email address

    ABMutableMultiValueRef EmailVar = ABMultiValueCreateMutable(kABMultiStringPropertyType);

    ABMultiValueAddValueAndLabel(EmailVar,@"d.scott@hotmail.com" , kABWorkLabel, NULL);

    ABRecordSetValue(newPerson, kABPersonEmailProperty, EmailVar,nil);

    CFRelease(EmailVar);

    

   

    //Add my mailing address

    ABMutableMultiValueRef Address = ABMultiValueCreateMutable(kABMultiDictionaryPropertyType);

    NSMutableDictionary *addressDict = [[NSMutableDictionary alloc] init];

    [addressDictionary setObject:streetString forKey:(NSString *) kABPersonAddressStreetKey];

    [addressDictionary setObject:@"Boston" forKey:(NSString *)kABPersonAddressCityKey];

    [addressDictionary setObject:@"02124" forKey:(NSString *)kABPersonAddressZIPKey];

    [addressDictionary setObject:@"US" forKey:(NSString *)kABPersonAddressCountryKey];

    ABMultiValueAddValueAndLabel(Address, addressDict, kABWorkLabel, NULL);

    ABRecordSetValue(newPerson, kABPersonAddressProperty, Address,&error);

    CFRelease(Address);

    

    //Finally saving the contact in the address book

    ABAddressBookAddRecord(iPhoneAddressBook, newPerson, &error);

    ABAddressBookSave(iPhoneAddressBook, &error);

    if (error != NULL) 

    {

        NSLog(@"Saving contact failed.");

    }

    NSLog(@"Contact saved.");

How to create a transparent background in CGContext ?

    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextSaveGState(context);

    CGRect a=self.frame;

    a.origin.x=0;

    a.origin.y=0;

    CGContextSetBlendMode(context, kCGBlendModeClear);

    CGContextSetFillColorWithColor(context, [UIColor blackColor].CGColor);    

    CGContextAddRect(context, a);

    CGContextFillPath(context);

    CGContextRestoreGState(context);

Don't forget to add the background color as clear color.

- (id)initWithFrame:(CGRect)frame

{

    self = [super initWithFrame:frame];

    if (self) {

        // Initialization code

        [self setBackgroundColor:[UIColor clearColor]];

    }

    return self;

}

How to compare CGPoint

if (CGPointEqualToPoint(point1,point2) == YES)
{
       NSLog(@"Points are equal");
}

MultiLine text on a UIButton

aButton.titleLabel.lineBreakMode = UILineBreakModeWordWrap;
[aButton setTitle: @"View MIMChartLib \n Created by Reetu Raj" forState: UIControlStateNormal];