jazzsasori

import UIKit

class ViewController: UIViewController {

    @IBOutlet var button:UIButton
    @IBAction func buttonTapped(sender:AnyObject) {
        var tappedButton:UIButton = sender as UIButton
        tappedButton.setTitle("tapped", forState:UIControlState.Normal)
    }

jazzsasori

// 今までの書き方
#import <BlocksKit/BlocksKit.h>

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button addEventHandler:^(id sender) {
    // do something
} forControlEvents:UIControlEventTouchUpInside];


// 2.0の書き方

jazzsasori

// 以下は同義
// __strong NSString *strongString;
//          NSString *strongString;

__strong NSString *strongString = [[NSString alloc] initWithFormat:@"テスト"];
__weak   NSString *weakString   = strongString;
NSLog(@"strong: %@ , weak: %@", strongString, weakString); // strong: テスト , weak: テスト
// 「テスト」が解放される
strongString = [[NSString alloc] initWithFormat:@"あいう"];
NSLog(@"strong: %@ , weak: %@", strongString, weakString); // strong: あいう , weak: nil