swizzleClassMethod:selector:swizzleClass:

#import <Foundation/Foundation.h>
#import <objc/runtime.h>
 
@interface Swizzler : NSObject
 
- (void)swizzleClassMethod:(Class)target_class selector:(SEL)selector swizzleClass:(Class)swizzleClass;
- (void)deswizzle;
 
@end
 
#import "Swizzler.h"
 
@implementation Swizzler
 
Method originalMethod = nil;
Method swizzleMethod = nil;
 
/**
Swaps the implementation of an existing class method with the corresponding method in the swizzleClass.
 */
- (void)swizzleClassMethod:(Class)targetClass selector:(SEL)selector swizzleClass:(Class)swizzleClass
{
	originalMethod = class_getClassMethod(targetClass, selector); // save the oringinal implementation so it can be restored
	swizzleMethod = class_getClassMethod(swizzleClass, selector); // save the replacement method
	method_exchangeImplementations(originalMethod, swizzleMethod); // perform the swap, replacing the original with the swizzle method implementation.
}
 
/**
 Restores the implementation of an existing class method with its original implementation.
 */
- (void)deswizzle
{
	method_exchangeImplementations(swizzleMethod, originalMethod); // perform the swap, replacing the previously swizzled method with the original implementation.
	swizzleMethod = nil;
	originalMethod = nil;
}
 
@end

#import <Foundation/Foundation.h>
 
typedef void (^completeBlock_t)(NSData *data);
typedef void (^errorBlock_t)(NSError *error);
 
@interface AsyncURLConnection : NSObject
{
    NSMutableData *data;
    completeBlock_t completeBlock;
    errorBlock_t errorBlock;
}
 
/**
 Asynchronously performs an HTTP GET - invokes one of the blocks depending on the response to the request 
*/
+ (id)request:(NSString *)requestUrl completeBlock:(completeBlock_t)aCompleteBlock errorBlock:(errorBlock_t)anErrorBlock;
 
/**
 Initializes and asynchronously performs an HTTP GET - invokes one of the blocks depending on the response to the request
 */
- (id)initWithRequest:(NSString *)requestUrl completeBlock:(completeBlock_t)aCompleteBlock errorBlock:(errorBlock_t)anErrorBlock;
 
// If both HTTP Basic authentication optional parameters are non-empty strings, request will encode the URL with them.
@property (nonatomic, copy) NSString *authUserName; // HTTP Basic authentication optional parameter
@property (nonatomic, copy) NSString *authPassword; // HTTP Basic authentication optional parameter
 
@property (nonatomic, copy) NSString *accept; // Optional parameter to set the response type accepted (default is @"application/json")
 
@end

{
    "coaches" :
	[
     {
     "id" : 1,
     "name" : "Jeff Tucker",
     "thumbnail_url" : "http://img.breakingmuscle.com/sites/default/files/imagecache/full_portrait/images/author/64337_10150578149548471_1189630488_n.jpg"
     },
     {
     "id" : 2,
     "name" : "Traver H. Boehm",
     "thumbnail_url" : "http://img.breakingmuscle.com/sites/default/files/imagecache/full_portrait/images/author/traver.jpg"
     },
     {
     "id" :3,
     "name" : "Jeff Tucker",
     "thumbnail_url" : "http://img.breakingmuscle.com/sites/default/files/imagecache/full_portrait/images/author/64337_10150578149548471_1189630488_n.jpg"
     },
     {
     "id" : 4,
     "name" : "Traver H. Boehm",
     "thumbnail_url" : "http://img.breakingmuscle.com/sites/default/files/imagecache/full_portrait/images/author/traver.jpg"
     },
     {
     "id" : 5,
     "name" : "Jeff Tucker",
     "thumbnail_url" : "http://img.breakingmuscle.com/sites/default/files/imagecache/full_portrait/images/author/64337_10150578149548471_1189630488_n.jpg"
     },
     {
     "id" : 6,
     "name" : "Traver H. Boehm",
     "thumbnail_url" : "http://img.breakingmuscle.com/sites/default/files/imagecache/full_portrait/images/author/traver.jpg"
     }
     ],
    "per_page": 6,
    "page": 1,
    "total" : 11,
    "total_pages": 2
}

- (void)loadCollectionFromEndpoint:(NSString *)endpoint successBlock:(JSONLoaderLoadSuccessBlock)successBlock failBlock:(JSONLoaderLoadFailBlock)failBlock

+ (id)request:(NSString *)requestUrl completeBlock:(completeBlock_t)completeBlock errorBlock:(errorBlock_t)errorBlock;

- (void)test_loadPopularCoaches_success
{
    // Test set-up
    Swizzler *swizzler = [Swizzler new];
    // Replace the actual AsyncURLConnection method with our own test one.
    [swizzler swizzleClassMethod:[AsyncURLConnection class] selector:@selector(request:completeBlock:errorBlock:) swizzleClass:[RequestPopularCoachesPassMock class]];
    __block BOOL hasCalledBack = NO;
 
    // Test
    NSString *endpoint = [NSString stringWithFormat:@"%@?per_page=6&page=1&popular=true", kCoachesEndpoint];
    [[JSONLoader sharedJSONLoader] loadCollectionFromEndpoint:endpoint successBlock:^(NSDictionary *collection) {
        NSArray *coaches = [collection valueForKey:@"coaches"];
        assertThat(coaches, hasCountOf(6)); 
        int i = 0;
        for (NSDictionary *coach in coaches) {
            STAssertTrue([coach isKindOfClass:[NSDictionary class]], @"Incorrect class");
            assertThat(coach, equalTo([popularCoaches objectAtIndex:i])); // popularCoaches defined elsewhere with expected data
            ++i;
        }
        assertThat([collection valueForKey:@"per_page"], equalToInt(6));
        assertThat([collection valueForKey:@"page"], equalToInt(1));
        assertThat([collection valueForKey:@"total"], equalToInt(11));
        assertThat([collection valueForKey:@"total_pages"], equalToInt(2));
        hasCalledBack = YES;
    } failBlock:^(NSError *error) {
        NSLog(@"%@", [error localizedDescription]);
        STFail(@"Unexpected error returned");
        hasCalledBack = YES;
    }];
 
    // see http://drewsmitscode.posterous.com/testing-asynchronous-code-in-objective-c
    NSDate *loopUntil = [NSDate dateWithTimeIntervalSinceNow:1];
    while (hasCalledBack == NO) {
        [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:loopUntil];
    }
    swizzler = nil;
}

@interface RequestPopularCoachesPassMock : NSObject
 
+ (id)request:(NSString *)requestUrl completeBlock:(completeBlock_t)completeBlock errorBlock:(errorBlock_t)errorBlock;
 
@end
 
@implementation RequestPopularCoachesPassMock
 
// Swizzled method
+ (id)request:(NSString *)requestUrl completeBlock:(completeBlock_t)completeBlock errorBlock:(errorBlock_t)errorBlock
{
    if (completeBlock) {
        NSData *data = [FileReader dataWithContentsOfBundleFile:@"popularCoaches.json"];
        completeBlock(data);        
    }
    return self;
}
 
@end

//
//  LocationGetter.h
//  CoreLocationExample
//
//  Created by Matt on 9/3/10.
//  Copyright 2009 iCodeBlog. All rights reserved.
//
 
#import <uikit/UIKit.h>
#import <coreLocation/CoreLocation.h>
 
@protocol LocationGetterDelegate
@required
- (void) newPhysicalLocation:(CLLocation *)location;
@end
 
@interface LocationGetter : NSObject  {
    CLLocationManager *locationManager;
    id delegate;
}
 
- (void)startUpdates;
 
@property (nonatomic, retain) CLLocationManager *locationManager;
@property(nonatomic , retain) id delegate;
@end

//  LocationGetter.m
//  CoreLocationExample
//
//  Created by Matt on 9/3/10.
//  Copyright 2009 iCodeBlog. All rights reserved.
//
 
#import "LocationGetter.h"
#import <coreLocation/CoreLocation.h>
 
@implementation LocationGetter
 
@synthesize locationManager, delegate;
BOOL didUpdate = NO;
 
- (void)startUpdates
{
    NSLog(@"Starting Location Updates");
 
    if (locationManager == nil)
        locationManager = [[CLLocationManager alloc] init];
 
    locationManager.delegate = self;
 
    // locationManager.distanceFilter = 1000;  // update is triggered after device travels this far (meters)
 
    // Alternatively you can use kCLLocationAccuracyHundredMeters or kCLLocationAccuracyHundredMeters, though higher accuracy takes longer to resolve
    locationManager.desiredAccuracy = kCLLocationAccuracyKilometer;
    [locationManager startUpdatingLocation];
}
 
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Your location could not be determined." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
    [alert show];
    [alert release];
}
 
// Delegate method from the CLLocationManagerDelegate protocol.
- (void)locationManager:(CLLocationManager *)manage didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    if (didUpdate)
        return;
 
    didUpdate = YES;
    // Disable future updates to save power.
    [locationManager stopUpdatingLocation];
 
    // let our delegate know we're done
    [delegate newPhysicalLocation:newLocation];
}
 
- (void)dealloc
{
    [locationManager release];
 
    [super dealloc];
}
 
@end

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 
    UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
	spinner.center = CGPointMake(self.viewController.view.frame.size.width / 2, self.viewController.view.frame.size.height / 2);
    [spinner startAnimating];
 
    [viewController.view addSubview:spinner];
 
    // get our physical location
    LocationGetter *locationGetter = [[LocationGetter alloc] init];
    locationGetter.delegate = self;
    [locationGetter startUpdates];
 
    // Add the view controller's view to the window and display.
    [window addSubview:viewController.view];
    [window makeKeyAndVisible];
 
    return YES;
}

//
//  CoreLocationExampleAppDelegate.h
//  CoreLocationExample
//
//  Created by Matt Tuzzolo on 9/3/10.
//  Copyright iCodeBlog 2010. All rights reserved.
//
 
#import <uikit/UIKit.h>
#import "LocationGetter.h"
 
@class CoreLocationExampleViewController;
 
@interface CoreLocationExampleAppDelegate : NSObject  {
    UIWindow *window;
    CoreLocationExampleViewController *viewController;
    CLLocation *lastKnownLocation;
}
 
@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet CoreLocationExampleViewController *viewController;
@property (nonatomic, retain) CLLocation *lastKnownLocation;
 
@end

# pragma mark -
# pragma mark LocationGetter Delegate Methods
 
- (void)newPhysicalLocation:(CLLocation *)location {
 
    // Store for later use
    self.lastKnownLocation = location;
 
    // Remove spinner from view
    for (UIView *v in [self.viewController.view subviews])
    {
        if ([v class] == [UIActivityIndicatorView class])
        {
            [v removeFromSuperview];
            break;
        }
    }
 
    // Alert user
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Location Found" message:[NSString stringWithFormat:@"Found physical location.  %f %f", self.lastKnownLocation.coordinate.latitude, self.lastKnownLocation.coordinate.longitude] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
    [alert show];
    [alert release];
 
    // ... continue with initialization of your app
}

// Setting the text
[myTextField setText:@"This is some text!"];
 
// Setting the placeholder
[myTextField setPlaceholder:@"Type text here"];
 
// Setting the font.
[myTextField setFont:[UIFont fontWithName:@"Times New Roman" size:14]];
 
// Setting the text color
[myTextField setTextColor:[UIColor blueColor]];
 
// Setting the text alignment
[myTextField setTextAlignment:UITextAlignmentCenter];

[myTextField setFont:[UIFont fontWithName:@"Times New Roman" size:30]];
[myTextField setAdjustsFontSizeToFitWidth:YES];

// Border Style None
[myTextField setBorderStyle:UITextBorderStyleNone];

// Border Style Line
[myTextField setBorderStyle:UITextBorderStyleLine];

// Border Style Bezel
[myTextField setBorderStyle:UITextBorderStyleBezel];

// Border Style Rounded Rect
[myTextField setBorderStyle:UITextBorderStyleRoundedRect];

myTextField.textAlignment = UITextAlignmentCenter;
myTextField.textColor = [UIColor whiteColor];
myTextField.borderStyle = UITextBorderStyleNone;
myTextField.background = [UIImage imageNamed:@"bg.png"];

UIImageView * myView = [[ UIImageView  alloc ]  initWithImage :
		[UIImage  imageNamed : @"wordpress.png" ]];
[myTextField  setLeftView :myView];
[ myTextField   setLeftViewMode: UITextFieldViewModeAlways];
[myView release ];

[myTextField becomeFirstResponder];

[myTextField resignFirstResponder];