Incognito mode (private browsing)

For times when you want to browse in stealth mode, for example, to plan surprises like gifts or birthdays, Google Chrome offers the incognito browsing mode. Here’s how the incognito mode works:

Webpages that you open and files downloaded while you are incognito aren’t recorded in your browsing and download histories.
All new cookies are deleted after you close all incognito windows that you’ve opened.
Changes made to your Google Chrome bookmarks and general settings while in incognito mode are always saved.
Keyboard shortcut: Ctrl+Shift+N

Advanced Search in Address Bar

Chrome uses a search engine as your type a url. So the address bar can be used for search and for inserting a url. Autocomplete is very helpful even in very specific searches.

Also Check out this screen. In options

There are default Search options but also Other search engines from Sites you use mostly (this is done for you automatically)

Quick Search

Type your search. As you type you can see the number of occurrences (current occurrences is highlighted in orange).
Check out that the search string is highlighted in the scrollbar also.

Keyboard shortcut: CTRL + F

Speed

see some past test i did with tracemonkey here

Next get WinSCP and find your iPhone’s ip by going to (on your iphone) settings > Wi-Fi > “Your selected WiFi” > Look under IP Address- Connect to your iPhone using WinSCP (user: root password: alpine) Change File Protocol to SCP.

Once OpenSSH is installed your phone will be vunerable to all users in a specific wifi subnet. Make sure to Use the WinSCP terminal window an use this command to change password:

passwd root
type in password, press return
type it in again, press return

To avoid frequent logouts remember to change the Setting -> General -> Auto-Lock (5 minutes or Never)

Save/Load/Remove Image Methods

//saving an image

- (void)saveImage:(UIImage*)image:(NSString*)imageName {

NSData *imageData = UIImagePNGRepresentation(image); //convert image into .png format.

NSFileManager *fileManager = [NSFileManager defaultManager];

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentsDirectory = [paths objectAtIndex:0];

NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png", imageName]];

[fileManager createFileAtPath:fullPath contents:imageData attributes:nil];

NSLog(@"image saved");

}

//removing an image

- (void)removeImage:(NSString*)fileName {

NSFileManager *fileManager = [NSFileManager defaultManager];

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentsDirectory = [paths objectAtIndex:0];

NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png", fileName]];

[fileManager removeItemAtPath: fullPath error:NULL];

NSLog(@"image removed");

}

//loading an image

- (UIImage*)loadImage:(NSString*)imageName {

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentsDirectory = [paths objectAtIndex:0];

NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png", imageName]];

return [UIImage imageWithContentsOfFile:fullPath];

}

Now, you can easily save an image like:

[self saveImage: myUIImage: @"myUIImageName"];

or load it like:

myUIImage = [self loadImage: @"myUIImageName"];

or remove it like:

[self removeImage: @"myUIImageName"];

Capture an image

- (UIImage*) getGLScreenshot {
    NSInteger myDataLength = 320 * 480 * 4;

    // allocate array and read pixels into it.
    GLubyte *buffer = (GLubyte *) malloc(myDataLength);
    glReadPixels(0, 0, 320, 480, GL_RGBA, GL_UNSIGNED_BYTE, buffer);

    // gl renders "upside down" so swap top to bottom into new array.
    // there's gotta be a better way, but this works.
    GLubyte *buffer2 = (GLubyte *) malloc(myDataLength);
    for(int y = 0; y <480; y++)
    {
        for(int x = 0; x <320 * 4; x++)
        {
            buffer2[(479 - y) * 320 * 4 + x] = buffer[y * 4 * 320 + x];
        }
    }

    // make data provider with data.
    CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, buffer2, myDataLength, NULL);

    // prep the ingredients
    int bitsPerComponent = 8;
    int bitsPerPixel = 32;
    int bytesPerRow = 4 * 320;
    CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB();
    CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault;
    CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault;

    // make the cgimage
    CGImageRef imageRef = CGImageCreate(320, 480, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent);

    // then make the uiimage from that
    UIImage *myImage = [UIImage imageWithCGImage:imageRef];
    return myImage;
}

- (void)saveGLScreenshotToPhotosAlbum {
	UIImageWriteToSavedPhotosAlbum([self getGLScreenshot], nil, nil, nil);
}

The solution is quite weird. Open the Airport (wifi) in your mac and the CLLocationManager will work as before fetching the Cupertino, or in my case fetching a wide area of my country.
I guess the Location is estimated by the internet ip address of your connection.

General

• ‘join’ an array of strings into a single string

  NSArray *chunks  = ... get an array, say by splitting it;
  string = [chunks componentsJoinedByString: @" /// "];

  would produce something like

  oop /// ack /// bork /// greeble /// ponies

• ‘split’ a string into an array

   NSString *string = @"oop:ack:bork:greeble:ponies";
  NSArray *chunks = [string componentsSeparatedByString: @":"];

• Converting string to an integer

  NSString *string = ...;
  int value = [string intValue];
  

  Similarly, there is a floatValue and doubleValue NSString methods.

• Iterating attributes in an attributed string
  This prints out each of the attribute runs from an attributed string:

  - (void) iterateAttributesForString: (NSAttributedString *) string
  {
      NSDictionary *attributeDict;
      NSRange effectiveRange = { 0, 0 };
  
      do {
          NSRange range;
          range = NSMakeRange (NSMaxRange(effectiveRange),
                               [string length] - NSMaxRange(effectiveRange));
  
          attributeDict = [string attributesAtIndex: range.location
                                  longestEffectiveRange: &effectiveRange
                                  inRange: range];
  
          NSLog (@"Range: %@  Attributes: %@",
                 NSStringFromRange(effectiveRange), attributeDict);
  
      } while (NSMaxRange(effectiveRange) < [string length]);
  
  } // iterateAttributesForString

• Making localizable strings
  You will need a file named Localizable.strings that lives in your English.lproj directory (or whatever localization directory is appropriate). It has this syntax:

  "BorkDown" = "BorkDown";
  "Start Timer" = "Start Timer";
  "Stop Timer" = "Stop Timer";

  That is, a key followed by a localized value.In your code, you can then use NSLocalizedString() or one of its variants:

          [statusItem setTitle: NSLocalizedString(@"BorkDown", nil)];

  The second argument is ignored by the function. Obstensively it is a /* comment */ in the strings file so that you can match the key back to what it is supposed to actually be.

• NSLog without the extra crud
  NSlog puts too much crud in front of the logging line. For a foundation tool that output stuff, it gets in the way. I’d still like for a replacement to expand %@, which the printf() family won’t do. Here’s a some code that’ll do that.

  #include <stdarg.h>
  
  void LogIt (NSString *format, ...)
  {
      va_list args;
  
      va_start (args, format);
  
      NSString *string;
  
      string = [[NSString alloc] initWithFormat: format  arguments: args];
  
      va_end (args);
  
      printf ("%s\n", [string cString]);
  
      [string release];
  
  } // LogIt

• Putting an image into an attributed string
  You’ll need to use a text attachment.

  - (NSAttributedString *) prettyName
  {
      NSTextAttachment *attachment;
      attachment = [[[NSTextAttachment alloc] init] autorelease];
      NSCell *cell = [attachment attachmentCell];
  
      NSImage *icon = [self icon]; // or wherever you are getting your image
      [cell setImage: icon];
  
      NSString *name = [self name];
      NSAttributedString *attrname;
      attrname = [[NSAttributedString alloc] initWithString: name];
  
      NSMutableAttributedString *prettyName;
      prettyName = (id)[NSMutableAttributedString attributedStringWithAttachment:
                                                  attachment]; // cast to quiet compiler warning
      [prettyName appendAttributedString: attrname];
  
      return (prettyName);
  
  } // prettyName

  This puts the image at the front of the string. To put the image in the middle of the string, you’ll need to create an attributedstring with attachment, and then append that to your final attributed string.

• Stripping out newlines from a string
  So you have an NSString and want to yank out the newlines. You can do a  split and join, like in scripting languages, or you can make a mutable copy and manipulate that:

      NSMutableString *mstring = [NSMutableString stringWithString:string];
      NSRange wholeShebang = NSMakeRange(0, [mstring length]);
  
      [mstring replaceOccurrencesOfString: @"
  "
               withString: @""
               options: 0
               range: wholeShebang];
  
      return [NSString stringWithString: mstring];

  (this can also be used for generic string manipulations, not just stripping out newlines).This technique takes half the time (at least) of split/join. But probably not enough to make an impact. In a simple test, split/join took 0.124 seconds to strip 36909 newlines in a 1.5 meg textfile, and 0.071 seconds to do the same.

• Substring matching
  NSRange range = [[string name] rangeOfString: otherString options: NSCaseInsensitiveSearch];
• Today’s date as a string
  The general solution for converting a date to a string is NSDateFormatter. Sometimes you need to generate a date string in a particular format easily. For instance if you need “December 4, 2007″, you can use:

  [[NSDate date] descriptionWithCalendarFormat: @"%B %e, %Y" timeZone: nil locale: nil]

  (Thanks to Mike Morton for this one)

• Trimming whitespace from ends of a string

      NSString *ook = @"\n \t\t hello there \t\n  \n\n";
      NSString *trimmed =
          [ook stringByTrimmingCharactersInSet:
                   [NSCharacterSet whitespaceAndNewlineCharacterSet]];
  
      NSLog(@"trimmed: '%@'", trimmed);

  produces

  2009-12-24 18:24:42.431 trim[6799:903] trimmed: 'hello there'

Graphics

• Draw a string in bold

  - (void) drawLabel: (NSString *) label
             atPoint: (NSPoint) point
                bold: (BOOL) bold {
      NSMutableDictionary *attributes = [NSMutableDictionary dictionary];
      NSFont *currentFont = [NSFont userFontOfSize: 14.0];
  
      if (bold) {
  	NSFontManager *fm = [NSFontManager sharedFontManager];
  	NSFont *boldFont = [fm convertFont: currentFont
                                 toHaveTrait: NSBoldFontMask];
  	[attributes setObject: boldFont
                      forKey: NSFontAttributeName];
      } else {
  	[attributes setObject: currentFont
                      forKey: NSFontAttributeName];
      }
  
      [label drawAtPoint: point  withAttributes: attributes];;
  
  } // drawLabel

Random

• Put a string on the pasteboard
  Here’s a category for easily putting a string on the paste|clipboard:

  @implementation NSString (PasteboardGoodies)
  
  - (void) sendToPasteboard
  {
          [[NSPasteboard generalPasteboard]
              declareTypes: [NSArray arrayWithObject: NSStringPboardType]
              owner:nil];
          [[NSPasteboard generalPasteboard]
              setString: self
              forType: NSStringPboardType];
  } // sendToPasteboard
  
  @end // PasteboardGoodies

This is a small collection of my personal preference of color themes for xcode programming environment. For those who are looking for a dark theme. You can chose from one of the following color themes. I’m currently using teliaz theme, it has been tested and works very smoothly.

To get

teliaz theme

run the following code in Terminal:

mkdir -p ~/Library/Application\ Support/Xcode/Color\ Themes; cd ~/Library/Application\ Support/Xcode/Color\ Themes; curl http://teliaz.com/files/apple/TeliazTheme.xccolortheme &> TeliazTheme.xccolortheme

To get

Ego theme

run the following code in Terminal:

mkdir -p ~/Library/Application\ Support/Xcode/Color\ Themes; cd ~/Library/Application\ Support/Xcode/Color\ Themes; curl http://teliaz.com/files/apple/XCodeColorTheme.xccolortheme &> EgoTheme.xccolortheme

“EGO” uses the font “DejaVu Sans Mono” at 12pt. Some of you may know it as “Panic Sans” from Panic’s Coda (which is a repackaged version of it). You can grab the font over at dejavu-fonts.org. If you already have Code installed, feel free to swap in Panic Sans in place of DejaVu Sans Mono.

To get

Humane Theme

run the following code in Terminal:

mkdir -p ~/Library/Application\ Support/Xcode/Color\ Themes; cd ~/Library/Application\ Support/Xcode/Color\ Themes; curl http://teliaz.com/files/apple/Humane.xccolortheme &> Humane.xccolortheme

Now just restart Xcode, go to Preferences > Fonts & Colors, and select “one of these themes” from the color theme drop down. Hope you like it!! Happy coding…

UIView *view6 = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 460.0)];
view6.frame = CGRectMake(0.0, 0.0, 320.0, 460.0);
view6.alpha = 1.000;
view6.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
view6.backgroundColor = [UIColor colorWithWhite:0.750 alpha:1.000];
view6.clearsContextBeforeDrawing = NO;
// ...

UIButton *view9 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
view9.frame = CGRectMake(167.0, 65.0, 72.0, 37.0);
view9.adjustsImageWhenDisabled = YES;
view9.adjustsImageWhenHighlighted = YES;
view9.alpha = 1.000;
view9.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleBottomMargin;
view9.clearsContextBeforeDrawing = NO;
view9.clipsToBounds = NO;
view9.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
// ...
[view9 setTitleShadowColor:[UIColor colorWithWhite:0.000 alpha:1.000] forState:UIControlStateSelected];

// ...
[view6 addSubview:view9];
// ...

Using this tool, I can now use IB for design, and then generate the code for those designs, in case I prefer to use a code-only approach (usually for UITableViewCells, as I explained before). For the moment it only works with UIKit classes, but I don’t think it might be a problem to extend it to AppKit classes as well.

I hope this project is useful to all of you! As usual, open source, public domain and on Github.

However, getting all the UI widgets to look similarly can be complex, particularly in large applications; what if your client or their designers change their minds about the font size or some background color right before shipping your project? Of course you can “search and replace” all occurrences of some color using Xcode, but you have the risk of leaving some unchanged widget somewhere. And believe me, this happens really often.

In this article I will discuss a simple approach, using Objective-C categories, to keep your styling information separated from the rest of the application, using a system that will be familiar to developers used to creating websites using CSS (Cascading Style Sheets).

FIRST APPROACH: SIMPLE CATEGORIES

The first, easiest approach is to create simple UIFont and UIColor categories in your application, and provide semantic descriptions of the data you want to style; for example “customerNameFont” and “companyPhoneColor” are good names. You can add as many class methods as you want to the UIFont and UIColor classes for that:

@interface UIFont (YourAppName)

+ (UIFont *)customerNameFont;
+ (UIFont *)customerPhoneFont;

@end

@implementation UIFont (YourAppName)

+ (UIFont *)customerNameFont
{
    return [UIFont fontWithName:@"Helvetica" size:22.0];
}

+ (UIFont *)customerPhoneFont
{
    return [UIFont boldSystemFontOfSize:15.0];
}

@end


And we provide the same treatment to the UIColor class:

@interface UIColor (YourAppName)

+ (UIColor *)customerNameColor;
+ (UIColor *)customerPhoneColor;

@end

@implementation UIColor (YourAppName)

+ (UIColor *)customerNameColor
{
      return [UIColor blueColor];
}

+ (UIColor *)customerPhoneColor
{
      return [UIColor redColor];
}
@end

Then, you can use those method names in the rest of your application:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil)
    {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle
                                       reuseIdentifier:CellIdentifier] autorelease];

        // And here goes the styling!
        cell.textLabel.font = [UIFont customerNameFont];
        cell.textLabel.textColor = [UIColor customerNameColor];

        cell.detailTextLabel.font = [UIFont customerPhoneFont];
        cell.detailTextLabel.textColor = [UIColor customerPhoneColor];
    }

    Customer *cust = [self.data objectAtIndex:indexPath.row];
    cell.textLabel.text = cust.name
    cell.detailTextLabel.text = cust.phone

    return cell;
}

The advantage of this simple approach is that all styles are managed from a central location, and you can change the fonts and colors of your application in a single step.

There are, however, two major disadvantages:

Colors and fonts defined on their respective categories will not be available in Interface Builder, so you might have to override viewDidLoad or other methods to force the styling at a certain moment, or to set the color and font values manually, which might lead to duplicate information.
Some UI elements have support for even more styling information, like shadows or CGAffineTransform values, which cannot be handled in a simple way with this method.
We need some kind of CSS for iPhone applications, and the next section provides a rudimentary approach to that problem.

SECOND APPROACH, “CASCADING STYLE” CLASSES

Let’s push the idea of semantic styling a bit; in the previous example, we created separated categories for UIFont and UIColor and used them in atomic form, changing individual properties of your widgets, one by one.

What if you wanted to set several properties at once, just like with CSS classes on web pages? What if you had a system which could be extended to support more properties, for other, as of yet unknown, future UI widgets? For that, we would need a special container for style information, like a CSS stylesheet, and we should be able to assign this container to any kind of visual widget; in turn, those widgets would automatically adapt their layout and appearance. There are many different ways to do this; and this is just one of them.

First I declare a class called AKCascadingStyle, which holds basic styling information, and which is able to apply that information to any kind of object passed in parameter:

@interface AKCascadingStyle : NSObject
{
@private
    UIFont *_font;
    UIColor *_textColor;
    UIColor *_backgroundColor;
    UIColor *_tintColor;
}

@property (nonatomic, retain) UIFont *font;
@property (nonatomic, retain) UIColor *textColor;
@property (nonatomic, retain) UIColor *backgroundColor;
@property (nonatomic, retain) UIColor *tintColor;

+ (id)style;
+ (id)styleFromObject:(id)object;

- (void)applyToObject:(id)object;
- (void)setValuesFromObject:(id)object;

@end

This class can be inherited and extended, and its methods can be overridden, as we’ll see shortly, to add support for more properties. Then I add a category on NSObject (careful with this!) to support adding and retrieving style information in the form of AKCascadingStyle instances:

@class AKCascadingStyle;

@interface NSObject (AKCascadingStyle)

@property (nonatomic, retain) AKCascadingStyle *cascadingStyle;

@end

Why a category on NSObject? Because not everything you see on your iPhone screen is a subclass of UIView! UIBarButtonItems, for example, inherit from UIBarItem, which itself inherits from NSObject, and not from UIView. By the way, by extending NSObject, this code could also be used in Mac OS X applications, for example, without modification.

Given that categories cannot add ivars to existing classes, the getter of this property will call the [AKCascadingStyle styleFromObject:] method above:

@implementation NSObject (AKCascadingStyle)

@dynamic cascadingStyle;

- (void)setCascadingStyle:(AKCascadingStyle *)style
{
    [style applyToObject:self];
}

- (id)cascadingStyle
{
    return [AKCascadingStyle styleFromObject:self];
}

@end

Both [AKCascadingStyle applyToObject:] and [AKCascadingStyle styleFromObject:] are polymorphic (as all Objective-C methods are) so subclasses can extend their functionality as required (but don’t forget to send the same message to “super” before!):

@interface ShadowStyle : AKCascadingStyle
{
@private
    CGSize _shadowOffset;
    UIColor *_shadowColor;
}

@property (nonatomic) CGSize shadowOffset;
@property (nonatomic, retain) UIColor *shadowColor;

@end

Then, to use these style classes in your own controllers, just do the following:

- (IBAction)addStyle:(id)sender
{
    self.contentsTextView.cascadingStyle = [ShadowStyle style];
}

Setting this property will automatically set all the required parameters in your widget; text color, background colors, transformations, you name it. You can inherit styles in order to reuse them, and you can style pretty much any kind of UIKit widget with it.

You can download the code of this project from Github! Enjoy!

Some extra specs:

• Front glass panel of the iPhone is constructed of Corning Gorilla Glass
● 3.7V 1420 mAh Li-Polymer battery
● iPhone 4 has a whopping 512 MB
● Improved audio chamber aids in clarifying sounds leaving the iPhone
● Apple has integrated the UMTS, GPS, Wi-Fi, and bluetooth antennas into the stainless steel inner frame
● AGD1 is the new 3 axis gyroscope