Fernando Rodriguez Romero frr149

Co-Founder and Instructor at @KeepCoding_es Previously instructor at @bignerdranch & @udacity.

frr149 / transparentModalViewController.m

Created October 20, 2011 18:58

How to create a transparent modal View Controller

	#pragma mark - Transparent Modal View
	-(void) presentTransparentModalViewController: (UIViewController *) aViewController
	animated: (BOOL) isAnimated
	withAlpha: (CGFloat) anAlpha{

	self.transparentModalViewController = aViewController;
	UIView *view = aViewController.view;

	view.opaque = NO;
	view.alpha = anAlpha;

frr149 / gist:1892504

Created February 23, 2012 11:43

reverse geocoding with CoreLocation

	-(void) addressFromLocation: (CLLocation *) aLocation{



	CLGeocoder *geocoder = [[CLGeocoder alloc] init];
	self.activity.hidden = NO;
	[self.activity startAnimating];
	self.output.text = @"Ahora lo averiguo. Contactando con Paco Lobatón...";
	[geocoder reverseGeocodeLocation:aLocation
	completionHandler:^(NSArray placemarks, NSError error) {

frr149 / gist:2053009

Created March 16, 2012 21:53

	NSError *err = nil;
	NSURL *aURL = [NSURL URLWithString:@"http://www.google.com"];
	NSString *contents = [NSString stringWithContentsOfURL:aURL
	encoding:NSUTF8StringEncoding
	error:&err];

frr149 / gist:2053122

Created March 16, 2012 22:06

	-(NSString ) fetchStringFrom: (NSURL ) aURL error: (NSError **) err{

	// Haz algo raro que pueda cascar
	if (YES) {
	// Se ha producido un error
	NSDictionary *errorInfo = [NSDictionary dictionaryWithObject:NSLocalizedDescriptionKey
	forKey:@"Error al hacer algo arriesgado"];

	// recordad que se trata de una doble indirección, así que hay que usar *err
	*err = [NSError errorWithDomain:@"Mi dominio"

frr149 / gist:2053189

Created March 16, 2012 22:13

	NSError *err = nil;
	NSURL *aURL = [NSURL URLWithString:@"http://www.google.com"];
	NSString *contents = [NSString stringWithContentsOfURL:aURL
	encoding:NSUTF8StringEncoding
	error:&err];

	// Esto es incorrecto!!!!!
	if (err) {
	// Creo que ha habido un error
	NSLog(@"Creo que ha habido un error:%@", err.localizedDescription);

frr149 / gist:2053241

Created March 16, 2012 22:20

	NSError *err = nil;
	NSURL *aURL = [NSURL URLWithString:@"http://www.google.com"];
	NSString *contents = [NSString stringWithContentsOfURL:aURL
	encoding:NSUTF8StringEncoding
	error:&err];

	// Esto sí que es correcto: inspeccionar el valor del retorno
	if (!contents) {
	// Seguro que ha habido un error
	NSLog(@"Ahora sí que se ha producido un error:%@", err.localizedDescription);

frr149 / gist:2053242

Created March 16, 2012 22:20

	NSError *err = nil;
	NSURL *aURL = [NSURL URLWithString:@"http://www.google.com"];
	NSString *contents = [NSString stringWithContentsOfURL:aURL
	encoding:NSUTF8StringEncoding
	error:&err];

	// Esto sí que es correcto: inspeccionar el valor del retorno
	if (!contents) {
	// Seguro que ha habido un error
	NSLog(@"Ahora sí que se ha producido un error:%@", err.localizedDescription);

frr149 / gist:2053244

Created March 16, 2012 22:20

	NSError *err = nil;
	NSURL *aURL = [NSURL URLWithString:@"http://www.google.com"];
	NSString *contents = [NSString stringWithContentsOfURL:aURL
	encoding:NSUTF8StringEncoding
	error:&err];

	// Esto sí que es correcto: inspeccionar el valor del retorno
	if (!contents) {
	// Seguro que ha habido un error
	NSLog(@"Ahora sí que se ha producido un error:%@", err.localizedDescription);

frr149 / gist:3436543

Created August 23, 2012 13:20

Mandelbrot

	-(void)generateImageOfSize:(CGSize)imageSize
	{
	// Determine integer size of image
	NSInteger imageIntWidth = ceilf(imageSize.width);
	NSInteger imageIntHeight = ceilf(imageSize.height);

	// Determine coordinate maxima
	assert(zoomFactor > 0.0f);
	float coordMaxX = coordMinX + imageIntWidth / zoomFactor;
	float coordMaxY = coordMinY + imageIntHeight / zoomFactor;

frr149 / gist:3436544

Created August 23, 2012 13:21

Mandelbrot

	-(void)generateImageOfSize:(CGSize)imageSize
	{
	// Determine integer size of image
	NSInteger imageIntWidth = ceilf(imageSize.width);
	NSInteger imageIntHeight = ceilf(imageSize.height);

	// Determine coordinate maxima
	assert(zoomFactor > 0.0f);
	float coordMaxX = coordMinX + imageIntWidth / zoomFactor;
	float coordMaxY = coordMinY + imageIntHeight / zoomFactor;