Storyboardを使わずにUIAlertViewを表示させる。

storyboardを使わずにUIAlertViewを作成するには以下のようになる。この時,それぞれのbuttonIndexは

cancelButtonTitles が　0(cancel)
otherButtonTitles が 順に１(other1)，２(other2)

となる。

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Title"
                                                   message:@"Message"
                                                  delegate:self
                                         cancelButtonTitle:@"cancel"
                                         otherButtonTitles:@"other1",@"other2",nil];

    [alert show];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


-(void)alertView:(UIAlertView*)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (buttonIndex == 1) {
        NSLog(@"1");

    }else if (buttonIndex == 2){
        NSLog(@"2");
    }else if (buttonIndex == 0){
        NSLog(@"0");
    }

}

@end