Lambda-Alert

https://github.com/zoul/Lambda-Alert
ラムダ式で処理を書ける素敵なライブラリ。

    //Demoより抜粋
    LambdaAlert *alert = [[LambdaAlert alloc]
        initWithTitle:@"Test Alert"
        message:@"See if the thing works."];
    [alert addButtonWithTitle:@"Foo" block:^{ NSLog(@"Foo"); }];
    [alert addButtonWithTitle:@"Bar" block:^{ NSLog(@"Bar"); }];
    [alert addButtonWithTitle:@"Cancel" block:NULL];
    [alert setDismissAction:^{
        NSLog(@"Alert was dismissed.");
    }];
    [alert show];