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  NSString* filePath = [[NSBundle mainBundle] pathForResource:@"ck"
                                                         ofType:@"pem"];
 NSData *p12data = [NSData dataWithContentsOfFile:certificatePath];
 NSString *apnsToken = [p12data base64EncodedString];
 NSDictionary *parameters = @{@"apnsToken": apnsToken};

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enum SimpleEnum : ExampleProtocol {
    case Base, Adjusted
    
    var simpleDescription: String {
        get {
            return self.getDescription()
        }
    }
    
    func getDescription() -> String {

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Books

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Solution 1:

NSMangedObjectContext *temporaryContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
temporaryContext.parentContext = mainMOC;
 
[temporaryContext performBlock:^{
   // do something that takes some time asynchronously using the temp context
 
   // push to parent
   NSError *error;

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func handleKeyboardWillShowNotification(notification: NSNotification) {
        if self.inputContainerViewBottomLayoutGuideConstraint.constant == 0 {
            keyboardWillChangeFrameWithNotification(notification, showKeyboard: true)
            scrollBubbleTableViewToBottomAnimated(true)
        }
    }
    
    func handleKeyboardWillHideNotification(notification: NSNotification) {
        if self.inputContainerViewBottomLayoutGuideConstraint.constant > 0 {
            keyboardWillChangeFrameWithNotification(notification, showKeyboard: false)

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private func addListBubbleCellsWithCount(count: Int) {
        var contentOffset = self.tableView.contentOffset
        
        UIView.setAnimationsEnabled(false)
        
        var indexPaths = [NSIndexPath]()
        var heightForNewRows: CGFloat = 0
        
        for var i = 0; i < count; i++ {
            let indexPath = NSIndexPath(forRow: i, inSection: 0)

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class LINJSONHelper {
    class func jsonStringWithObject(obj: AnyObject) -> String? {
        var error: NSError?
        let jsonData  = NSJSONSerialization.dataWithJSONObject(obj, options: NSJSONWritingOptions(0), error: &error)
        if error != nil {
            println("Error creating JSON data: \(error!.description)");
            return nil
        }
        
        return NSString(data: jsonData, encoding: NSUTF8StringEncoding)

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 NSArray* array = [UIApplication sharedApplication].windows;
 for(id windowObject in array){
        NSString* class = NSStringFromClass([windowObject class]);
        if([class isEqualToString:@"UITextEffectsWindow"]){
            UIWindow* keyboardWindow = (UIWindow*)windowObject;
            keyboardWindow.windowLevel = self.view.window.windowLevel+1;
        }
 }

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// Indicate != nil instead of bool 
if navigationController {
}

if navigationController != nil {
}
            

// Use require keywork for require methods

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+ (id)objectForKey:(NSString *)key
{
    if ([key length] == 0) {
        return nil;
    }
    
    NSData *data = [[NSUserDefaults standardUserDefaults] objectForKey:key];
    if (!data) {
        return nil;
    }