ThinhPhan

Objective-C
- (void)getListAvailableFontNames {
    for (NSString *familyName in [UIFont familyNames]){
        NSLog(@"Family name: %@", familyName);
        for (NSString *fontName in [UIFont fontNamesForFamilyName:familyName]) {
            NSLog(@"--Font name: %@", fontName);
        }
    }
}

ThinhPhan

- (NSString *)md5:(NSString *)string {
    
    // Create pointer to the string as UTF8
    const char *ptr = [string UTF8String];
    
    // Create byte array of unsigned chars
    unsigned char md5Buffer[CC_MD5_DIGEST_LENGTH];
    
    // Create 16 byte MD5 hash value, store in buffer
    CC_MD5(ptr, strlen(ptr), md5Buffer ); // This is the md5 call

ThinhPhan

1. Set navigation bar style to black
 [self.navigationController.navigationBar setBarStyle:UIBarStyleDefault];
 
2. Set directly
- Set the UIViewControllerBasedStatusBarAppearance to YES in the .plist file.

- In the viewDidLoad do a 
 [self setNeedsStatusBarAppearanceUpdate];

- Add the following method:

ThinhPhan

//
//  UIColor+AppName.h
//  AppName
//
//  Created by Thinh Phan on 4/10/15.
//  Copyright (c) 2015 Gennova. All rights reserved.
//

// See http://blog.alexedge.co.uk/speeding-up-uicolor-categories/
#define AGEColorDefine(COLOR_NAME)    \

ThinhPhan

#pragma mark - Managing Keyboard
- (void)registerForKeyboardNotifications
{
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillShow:)
                                                 name:UIKeyboardWillShowNotification
                                               object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillBeHidden:)

ThinhPhan

// A compile-time check is what you need in the case of Xcode 5
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000
if ([application respondsToSelector:@selector(registerUserNotificationSettings:)]) {
    // use registerUserNotificationSettings
    
    // Register for Push Notitications - iOS 8 Notifications
        UIUserNotificationType userNotificationTypes = (UIUserNotificationTypeAlert |
                                                        UIUserNotificationTypeBadge |
                                                        UIUserNotificationTypeSound);
        UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:userNotificationTypes

ThinhPhan

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]
                                             initWithImage:img
                                             style:UIBarButtonItemStylePlain
                                             target:self
                                             action:@selector(onBack:)];
    self.navigationController.interactivePopGestureRecognizer.delegate = (id<UIGestureRecognizerDelegate>)self;

ThinhPhan

// Reference links:
// https://developer.apple.com/library/ios/documentation/FileManagement/Conceptual/FileSystemProgrammingGuide/TechniquesforReadingandWritingCustomFiles/TechniquesforReadingandWritingCustomFiles.html
// http://stackoverflow.com/questions/7651632/how-to-speed-up-saving-a-uiimagepickercontroller-image-from-the-camera-to-the-fi
// http://www.codedisqus.com/0zJVUVqgPj/objectivec-uiimagewritetosavedphotosalbum-asynchronous-problems.html
// http://stackoverflow.com/questions/14411369/when-i-am-using-uiimagepngrepresentation-or-uiimagejpegrepresentation-for-conver?rq=1

// Save multi files async for saving time
- (void)saveUploadImages:(NSMutableArray *)images {
    
    NSMutableArray *imagePaths = [[NSMutableArray alloc] init];

ThinhPhan

// Ref: http://stackoverflow.com/questions/11251340/convert-image-to-base64-string-in-ios-swift

// iOS7 > version for Objective-C
// You can use NSData's base64EncodedStringWithOptions
// Now encode as:

- (NSString *)encodeToBase64String:(UIImage *)image {
    return [UIImagePNGRepresentation(image) base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
}

ThinhPhan

//  UIImage+SimpleResize.h
//
//  Created by Robert Ryan on 5/19/11.

#import <Foundation/Foundation.h>

/** Image resizing category.
 *
 *  Modified by Robert Ryan on 5/19/11.
 *