Custom AlertView

PXAlertView is a UIAlertView replacement similar to the style in iOS 7 but with a block based API and the ability to customise the styling and add custom views.https://github.com/alexanderjarvis/PXAlertView

Transport Security iOS 9 WORKAROUND!

<key>NSAppTransportSecurity</key>
    <dict>
        <key>NSAllowsArbitraryLoads</key>
        <true/>
    </dict>

How to export a certificate.

To export a certificate from your keychain with the private key, Command-Click the certificate and choose ‘Export “Your Certificate Name”’ and choose the Personal Information Exchange format (.p12). You will be asked to enter a password to protect this file. Once you are done, anyone who has the p12 file and the password will be able to install the certificate and private key into their own keychain

Localization in iOS apps

AGi18n

CoreData Lightweight Migrations

NSDictionary *options = @{
NSMigratePersistentStoresAutomaticallyOption : @YES,
NSInferMappingModelAutomaticallyOption : @YES
};

.....

[_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil
        URL:storeURL options:options error:&error]

CoreData - SQL Debug

-com.apple.CoreData.SQLDebug 3

com.apple.CoreData.SQLDebug takes a value between 1 and 3; the higher the value, the more verbose the output.
Link

Singleton Pattern

+ (instancetype)sharedInstance {
  static id _sharedInstance = nil;
  static dispatch_once_t onceToken;
  dispatch_once(&onceToken, ^{
      _sharedInstance = [[self alloc] init];
  });
  return _sharedInstance;
}