josephzhang23

/*模型实现*/
double order;
if ([self.allItems count]==0) {
  order = 1.0;
} else {
  order = [[self.privateItems lastObject] orderingValue]+1.0;
}
NSLog(@"Adding after %d items, order=%.2f",[self.privateItems count], order);
/*模型实现*/

josephzhang23

-(instancetype)init {
  return [super initWithStyle:UITableViewStylePlain];
}
-(instancetype)initWithStyle:(UITableViewStyle)style {
  return [self init];
}
-(void)viewDidLoad {
  [super viewDidLoad];
  [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"UITableViewCell"];
}

josephzhang23

class NumbersParser: NumberParser {
    static let sharedInstance = NumbersParser()
    func numberToChinese(number: Int) -> String {
        let numbers = String(number).characters
        var finalString = ""
        for singleNumber in numbers {
            let string = singleNumberToChinese(number: singleNumber)
            finalString = "\(finalString)\(string)"
        }
        return finalString

josephzhang23

enum China: Int {
    case Guangzhou = 0
    case Beijing
    
    var description: String {
        switch self {
            case .Guangzhou:
                return "广州"
            case .Beijing:
                return "北京"

josephzhang23

override func didReceiveMemoryWarning() {
  super.didReceiveMemoryWarning()
  
  // 在这里销毁所有可以被重建的资源
}

josephzhang23

func addTo(_ adder: Int) -> (Int) -> Int {
    return {
        num in
        return num + adder
    }
}

let addTwo = addTo(2) //addTwo:Int -> Int
let result = addTwo(6) //result = 8

josephzhang23

-(void) callMe { 
  //...
}
-(void) callMeWithParam:(id)obj {
  //...
  
 }
 
 SEL someMethod = @selector(callMe);
 SEL anotherMethod = @selector(callMeWithParam:);

josephzhang23

func objectAtIndexPath(indexPath: NSIndexPath) -> Object {
    guard let result = fetchedResultsController.objectAtIndexPath(indexPath)
        as? Object else
    {
        fatalError("Unexpected object at \(indexPath)")
    }
    return result
}

josephzhang23

let nickName: String? = nil
let fullName: String = "John Appleseed"
let informalGreeting = "Hi \(nickName ?? fullName)"

josephzhang23

protocol ManagedObjectContextSettable: class {
    var managedObjectContext: NSManagedObjectContext! { get set }
}