Friday 30 March 2012

Common Functions

// Name : CommonFunctions.h
#import <Foundation/Foundation.h>

/*
 *  System Versioning Preprocessor Macros
 */



#define SYSTEM_VERSION_EQUAL_TO(v)                  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedSame)
#define SYSTEM_VERSION_GREATER_THAN(v)              ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedDescending)
#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v)  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)
#define SYSTEM_VERSION_LESS_THAN(v)                 ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)
#define SYSTEM_VERSION_LESS_THAN_OR_EQUAL_TO(v)     ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedDescending)


@interface CommonFunctions : NSObject {

}

+ (NSString *)documentsDirectory;
+ (void)openEmail:(NSString *)address;
+ (void)openPhone:(NSString *)number;
+ (void)openSms:(NSString *)number;
+ (void)openBrowser:(NSString *)url;
+ (void)openMap:(NSString *)address;

+ (void) hideTabBar:(UITabBarController *) tabbarcontroller;
+ (void) showTabBar:(UITabBarController *) tabbarcontroller;
+ (void) checkAndCreateDatabase;
+(void) setNavigationTitle:(NSString *) title ForNavigationItem:(UINavigationItem *) navigationItem;

+ (void)scrollViewToCenterOfScreen:(UIView *)theView onScrollView:(UIScrollView *) scrollview;
+(void) becomeNextFirstResponder:(UIView*)vc :(UITextField*)textField;
+(UIBarButtonItem*) getBackBtn;
+(void)BackBtnPressed;
+(UIImage*)getCachedImage:(NSString*)imageUrl;
+(void)showServerNotFoundError;
// user check session
+(BOOL)isUserLogin;
+(void) AlertTitle:(NSString*)title withMsg:(NSString*)msg;
+ (void)removeLoginFromStack;

@end

-------------------------------------------------
//  Name : CommonFunctions.m

#import "CommonFunctions.h"
#import "ImgCache.h"
#import "AppDelegate.h"
#import "LoginViewController.h"

@implementation CommonFunctions

//Default document paths
+ (NSString *)documentsDirectory {
    NSArray *paths =
    NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                        NSUserDomainMask,
                                        YES);
    return [paths objectAtIndex:0];
}

// Open application methods
+ (void)openEmail:(NSString *)address {
    NSString *url = [NSString stringWithFormat:@"mailto://%@", address];
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];
}

+ (void)openPhone:(NSString *)number {
    NSString *url = [NSString stringWithFormat:@"tel://%@", number];
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];
}

+ (void)openSms:(NSString *)number {
    NSString *url = [NSString stringWithFormat:@"sms://%@", number];
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];
}

+ (void)openBrowser:(NSString *)url {
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];
}

+ (void)openMap:(NSString *)address {
    NSString *addressText = [address stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];  
    NSString *url = [NSString stringWithFormat:@"http://maps.google.com/maps?q=%@", addressText];
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];
}



// Custom tab bar
+ (void) hideTabBar:(UITabBarController *) tabbarcontroller {
  
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.5];
    for(UIView *view in tabbarcontroller.view.subviews)
    {
        if([view isKindOfClass:[UITabBar class]])
        {
            [view setFrame:CGRectMake(view.frame.origin.x, 480, view.frame.size.width, view.frame.size.height)];
        }
        else
        {
            [view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, 480)];
        }
      
    }
  
    [UIView commitAnimations];
  
}
// Tab bar custmize
+ (void) showTabBar:(UITabBarController *) tabbarcontroller {
  
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.5];
    for(UIView *view in tabbarcontroller.view.subviews)
    {
        NSLog(@"%@", view);
      
        if([view isKindOfClass:[UITabBar class]])
        {
            [view setFrame:CGRectMake(view.frame.origin.x, 431, view.frame.size.width, view.frame.size.height)];
          
        }
        else
        {
            [view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, 431)];
        }
      
      
    }
  
    [UIView commitAnimations];
  
}

 // Database connect
+(void) checkAndCreateDatabase{
    // Check if the SQL database has already been saved to the users phone, if not then copy it over
    BOOL success;
  
    // Create a FileManager object, we will use this to check the status
    // of the database and to copy it over if required
    NSFileManager *fileManager = [NSFileManager defaultManager];
  
    // Check if the database has already been created in the users filesystem
    success = [fileManager fileExistsAtPath:DatabasePath];
  
    // If the database already exists then return without doing anything
    if(success) return;
  
    // If not then proceed to copy the database from the application to the users filesystem
  
    // Get the path to the database in the application package
    NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:DatabaseName];
  
    // Copy the database from the package to the users filesystem
    [fileManager copyItemAtPath:databasePathFromApp toPath:DatabaseName error:nil];
  

}

//Navigation custom title and font color need to write this method replacment of (self.title = @"";)
+(void) setNavigationTitle:(NSString *) title ForNavigationItem:(UINavigationItem *) navigationItem
{
  
    UILabel *titleLbl = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 200.0f, 44.0f)];
  
    [titleLbl setFont:[UIFont fontWithName:@"Helvetica" size:24.0f]];
    [titleLbl setBackgroundColor:[UIColor clearColor]];
    [titleLbl setTextAlignment:UITextAlignmentCenter];
  
    [titleLbl setTextColor:[UIColor blackColor]];
    //[titleLbl setShadowColor:UIColorFromRedGreenBlue(186,186,186)];
    [titleLbl setShadowOffset:CGSizeMake(1.0f, 1.0f)];
  
    [titleLbl setText:title];
  
  
    [navigationItem setTitleView:titleLbl];
  
    /** May also use this code for Whole App.
     * Inharit NavigationBar (CustomNavBar.h, .m)
   
     [[UINavigationBar appearance] setTitleTextAttributes:
    [NSDictionary dictionaryWithObjectsAndKeys:
     [UIColor blackColor], UITextAttributeTextColor,
     [UIColor whiteColor], UITextAttributeTextShadowColor,
     [NSValue valueWithUIOffset:UIOffsetMake(0, 1)], UITextAttributeTextShadowOffset,
     [UIFont boldSystemFontOfSize:20.0f], UITextAttributeFont,
     nil]];
     */
  
  
}

// set UITextField to be center of UISrollView pass the textFiled and scrollView obj as arguments
+ (void)scrollViewToCenterOfScreen:(UIView *)theView onScrollView:(UIScrollView *) scrollview {
  
  
    CGFloat viewCenterY = theView.center.y;
    CGRect applicationFrame = [[UIScreen mainScreen] applicationFrame];
  
    CGFloat availableHeight = applicationFrame.size.height - 200;            // Remove area covered by keyboard
  
    CGFloat y = viewCenterY - availableHeight / 2.0;
    if (y < 0) {
        y = 0;
    }
    [scrollview setContentOffset:CGPointMake(0, y) animated:YES]; 
  
}


+(void) becomeNextFirstResponder:(UIView*)vc :(UITextField*)textField{
    NSArray *arr=[[NSArray alloc] init];
    NSMutableArray *arr1=[[NSMutableArray alloc] init];
    BOOL isFound=NO;
  
    for(UIView *tf in [vc subviews])
    {
        if([tf isKindOfClass:[UITextField class]] && ((UITextField*)tf).enabled  && ((UITextField*)tf).hidden==NO)
        {
            [arr1 addObject:[NSMutableDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithFloat:((UITextField*)tf).frame.origin.y    ], @"y", ((UITextField*)tf), @"obj", nil]];
        }
    }
    NSSortDescriptor *sortByName = [NSSortDescriptor sortDescriptorWithKey:@"y"
                                                                 ascending:YES];
    NSArray    *sortDescriptors = [NSArray arrayWithObject:sortByName];
    arr = [arr1 sortedArrayUsingDescriptors:sortDescriptors];
    for(NSMutableDictionary *dic in arr){
        UITextField *tf=[dic valueForKey:@"obj"];
        if (isFound) {
            [tf becomeFirstResponder];
            break;
        }
        if (textField == tf) {
            isFound=YES;
            [textField resignFirstResponder];
        }
    }
}
// Make Custom back button for Navigation Bar
+(UIBarButtonItem*) getBackBtn{
    UIButton * backBtn=[UIButton buttonWithType:UIButtonTypeCustom];
    [backBtn setFrame:CGRectMake(0.0f,0.0f,52.0f,32.0f)];
    [backBtn setImage:[UIImage imageNamed:[NSString stringWithFormat:@"back_button_17"]] forState:UIControlStateNormal];
    [backBtn addTarget:self action:@selector(BackBtnPressed) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem *backBarButton = [[UIBarButtonItem alloc] initWithCustomView:backBtn];
    return backBarButton;  
}
+(void)BackBtnPressed{
    [[dicGlobal objectForKey:@"navCont"] popViewControllerAnimated:YES];
}
// Image cache concept
+(UIImage*)getCachedImage:(NSString*)imageUrl
{
    if ([Validate isNull:imageUrl]) {
        return [UIImage imageNamed:@"no_image.png"];
    }
    ImgCache *ic = [[ImgCache alloc] init];
  
    UIImage *img = [ic getCachedImage:imageUrl];
    return img;
}

+(void)showServerNotFoundError{
    UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Server not found" message:[NSString stringWithFormat:@"System can't connect to internet. Please check connectivity.\n Thank You!"] delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
}

// Check for UIUserDefualt set
+(BOOL)isUserLogin{
    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
  
    if ([userDefaults objectForKey:@"username"]  && ![Validate isNull:[userDefaults objectForKey:@"username"]])
        return YES;
    else
        return NO;
}

+(void) AlertTitle:(NSString*)title withMsg:(NSString*)msg{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title
                                                    message:msg
                                                   delegate:self
                                          cancelButtonTitle:@"OK"
                                          otherButtonTitles: nil];
    [alert show];
}


// Remove from UINavigation bar stack
// UINavigationBar Modification
+ (void)removeLoginFromStack{
    AppDelegate *appDelegate = (AppDelegate*) [[UIApplication sharedApplication] delegate];
    UINavigationController *navController = (UINavigationController*) [[appDelegate window] rootViewController];

    NSMutableArray *mutableStack = [[NSMutableArray alloc] initWithArray:[navController viewControllers]];
  
    for (id loginView in mutableStack) {
        if ([loginView isKindOfClass:[LoginViewController class]]) {
            [mutableStack removeObjectAtIndex:1];// login page index will be 1
            NSArray *stack = [NSArray arrayWithArray:mutableStack];
            [navController setViewControllers:stack];
            break;
        }
    }
  
}
@end
======================================

=====Required File //  ImgCache.h

// Name : ImgCache.h
#import <Foundation/Foundation.h>

@interface ImgCache : NSObject {
   
}

// Methods
- (void) cacheImage: (NSString *) ImageURLString;
- (UIImage *) getCachedImage: (NSString *) ImageURLString;
- (void) removeFromCache:(NSString *) ImageURLString;

@end
--------------------
//  Name : ImgCache.m

#import "ImgCache.h"
#define TMP NSTemporaryDirectory()

@implementation ImgCache

- (void) cacheImage: (NSString *) ImageURLString
{
    NSURL *ImageURL = [NSURL URLWithString: ImageURLString];
   
    NSMutableString *tempImgUrlStr = [NSMutableString stringWithString:[ImageURLString substringFromIndex:7]];
    [tempImgUrlStr replaceOccurrencesOfString:@"/" withString:@"-" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [tempImgUrlStr length])];
   
    // Generate a unique path to a resource representing the image you want
    NSString *filename = [NSString stringWithFormat:@"%@",tempImgUrlStr] ;//[ImageURLString substringFromIndex:7];   // [[something unique, perhaps the image name]];
    NSString *uniquePath = [TMP stringByAppendingPathComponent: filename];
   
    //NSLog(@"%@",uniquePath);
   
   
    // Check for file existence
    if(![[NSFileManager defaultManager] fileExistsAtPath: uniquePath])
    {
        // The file doesn't exist, we should get a copy of it
      
        // Fetch image
        NSData *data = [[NSData alloc] initWithContentsOfURL: ImageURL];
        [data writeToFile:uniquePath atomically:YES];
        
      
        /*NSFileManager *NSFm = [NSFileManager defaultManager];
        NSDictionary *attr;
        attr = [NSFm fileAttributesAtPath:uniquePath  traverseLink: NO];
        NSDate *fileCreationDate = [attr objectForKey:NSFileModificationDate];
        NSString *fileCreationDateString = [fileCreationDate description];
        NSLog(@"%@",fileCreationDateString);*/

      
        //UIImage *image = [[UIImage alloc] initWithData: data];
       
        // Do we want to round the corners?
       // image = [self roundCorners: image]; // dont need in this app...
       
      
        // Is it PNG or JPG/JPEG?
        // Running the image representation function writes the data from the image to a file
        /*
        if([ImageURLString rangeOfString: @".png" options: NSCaseInsensitiveSearch].location != NSNotFound)
        {
            [UIImagePNGRepresentation(image) writeToFile: uniquePath atomically: YES];
        }
        else if(
                [ImageURLString rangeOfString: @".jpg" options: NSCaseInsensitiveSearch].location != NSNotFound ||
                [ImageURLString rangeOfString: @".jpeg" options: NSCaseInsensitiveSearch].location != NSNotFound
                )
        {
            [UIImageJPEGRepresentation(image, 100) writeToFile: uniquePath atomically: YES];
        }
        */
   
      
    }
   
   
}

-(void) removeFromCache:(NSString *) ImageURLString{
   
    NSMutableString *tempImgUrlStr = [NSMutableString stringWithString:[ImageURLString substringFromIndex:7]];
    [tempImgUrlStr replaceOccurrencesOfString:@"/" withString:@"-" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [tempImgUrlStr length])];
   
    // Generate a unique path to a resource representing the image you want
    NSString *filename = [NSString stringWithFormat:@"%@",tempImgUrlStr] ;//[ImageURLString substringFromIndex:7];   // [[something unique, perhaps the image name]];
    NSString *uniquePath = [TMP stringByAppendingPathComponent: filename];
   
    //NSLog(@"%@",uniquePath);
   
    // Check for file existence
    if([[NSFileManager defaultManager] fileExistsAtPath: uniquePath])
    {
        [[NSFileManager defaultManager] removeItemAtPath:uniquePath error:nil];
    }

}



- (UIImage *) getCachedImage: (NSString *) ImageURLString
{

    NSMutableString *tempImgUrlStr = [NSMutableString stringWithString:[ImageURLString substringFromIndex:7]];
   
    [tempImgUrlStr replaceOccurrencesOfString:@"/" withString:@"-" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [tempImgUrlStr length])];

    NSString *filename = [NSString stringWithFormat:@"%@",tempImgUrlStr] ;//[ImageURLString substringFromIndex:7]; // [[something unique, perhaps the image name]];
    NSString *uniquePath = [TMP stringByAppendingPathComponent: filename];
   
    //NSLog(@"filename = %@, uniquepath = %@",filename,uniquePath);
   
   
   
    UIImage *image;
   
    // Check for a cached version
    if([[NSFileManager defaultManager] fileExistsAtPath: uniquePath])
    {
       // image = [UIImage imageWithContentsOfFile: uniquePath]; // this is the cached image
        NSData* imageData = [[NSData alloc] initWithContentsOfFile:uniquePath];
        image = [[UIImage alloc] initWithData:imageData];

    }
    else
    {
        // get a new one
        [self cacheImage: ImageURLString];
      
        NSData* imageData = [[NSData alloc] initWithContentsOfFile:uniquePath];
        image = [[UIImage alloc] initWithData:imageData];
   
      
        //NSData* imageData = [[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:ImageURLString]];
        //image = [[UIImage alloc] initWithData:imageData];
        //image = [UIImage imageWithContentsOfFile: uniquePath];
    }
   
    return image;
   
}
@end

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