Hi, Just i dont have so much time right now, here some snippets I collected for myself over the last couple of weeks

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1.

Should u use Wireshark and dont get it work, try this to find the Interfaces

sudo chmod 644 /dev/bpf*

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2.

MOUNT a ISO within yout MAC OSX
hdiutil mount image.iso

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3.

Dump Wifi Data

sudo tcpdump -i en1 -v    // to dump all wifi data

sudo tcpdump -i en0 -v   // to dump all ethernet data

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4.

Create a Screenshot programmaticly in your iPhone

IPhone screenshot

CGImageRef UIGetScreenImage();

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5.

MySQL TRICK

update cdent_clients set fachcode = replace(fachcode, “kfo”, “kf”)

= replace all ‘kfo’ in fachcode into “kf”

update cdent_clients set fachcode = replace(fachcode, “.”, “,”)

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6.

Convert WAV to CAF

afconvert -f caff -d LEI16@44100 -c 1 laugh3.wav laugh3.caf

CONVERT WAV TO CAF

find ./ -type f  -exec grep -l ‘hello’ {} \;

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7.

set text with two different strings or chars

galaxydesc.text = [NSString stringWithFormat:@"%@ %s",   @"Actual Image: ",   picdesc   ];

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8.

Make GLOBAL int or other Variables

place your wished global Variable in a external .h and import in each .m where you need

or place it in you _prefix.pch file which is imported to any .m automaticly

#ifdef __OBJC__

#import <Foundation/Foundation.h>

#import <UIKit/UIKit.h>

extern int firsttime;

#endif

important  write “extern” before you declaration!

Than in each .m just declare it as usual with example

int firsttime = 0;

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9.
Draw Image in your View

NSString* imageFileName = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@”redarea.png”];

CGDataProviderRef provider = CGDataProviderCreateWithFilename([imageFileName UTF8String]);

CGImageRef image = CGImageCreateWithPNGDataProvider(provider, NULL, true, kCGRenderingIntentDefault);

CGDataProviderRelease(provider);

// Draw image

CGContextSaveGState(context);

CGContextTranslateCTM(context, 0, 320);  // this is to rotate the image if it is upside down

CGContextScaleCTM(context, 1.0, -1.0);    // part II of rotation

CGContextDrawImage(context, CGRectMake(0, 0, 480, 320), image);

CGContextRestoreGState(context);

CGImageRelease(image);

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10.
DISABLE SLEEP MODE

- (void)applicationDidFinishLaunching:(UIApplication *)application {

// Disable Sleep Mode

application.idleTimerDisabled = YES;

// Override point for customization after application launch

[window makeKeyAndVisible];

}

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11.
Debugging with NSLOG

int myNumber = 3;

NSString *myText = @”Dog”;

NSLog(“My number is %i and my text is %@.”, myNumber,myText);

While

%i, %d signed integer

%u unsigned integer

%f float

%@ object

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12.

//Change Status Bar Orientation

[UIApplication sharedApplication].statusBarOrientation = UIInterfaceOrientationLandscapeRight;

//Activity Indicator in Status Bar

[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;  // or YES

//Show or Hide Status Bar

[self.navigationController setNavigationBarHidden:TRUE animated:NO];  // or NO to Hide

or in Case [[UIApplication sharedApplication] setStatusBarHidden:YES animated:NO];

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13.
//Paint a Line in a View

- (void)drawRect:(CGRect)rect {

// Paint LINE

CGContextRef context = UIGraphicsGetCurrentContext();

CGContextSetLineWidth(context, 2.0);

UIColor *color= [UIColor blueColor];

CGContextSetStrokeColorWithColor(context, color.CGColor);

CGContextMoveToPoint(context, 10.0,10.0 );

CGContextAddLineToPoint(context, a,100.0);

CGContextStrokePath(context);

}

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14.
//Place a Text in a View

- (void)drawRect:(CGRect)rect {

// Set Text

CGAffineTransform xform = CGAffineTransformMake(1.0,  0.0,0.0, -1.0,0.0,  0.0);

CGContextSelectFont(context, “Arial”, 24, kCGEncodingMacRoman);

CGContextSetTextMatrix(context, xform);

//CGContextSetTextDrawingMode(context, kCGTextFill);

CGContextSetRGBFillColor(context, 0, 0, 0, 1);

CGContextShowTextAtPoint(context, a,21, text, strlen(text)-1);

//[color release];

}

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15.
//Update your drawRect by Timer

Set a Time Call in your Startup:

[NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(onTimer) userInfo:nil repeats:YES];

-(void) onTimer {

// Code what you like to update. For example:  a++;

[self setNeedsDisplay];

}