UIActionSheet（操作列表）

 #import "AppDelegate.h"

 @interface AppDelegate ()<UIActionSheetDelegate>

 @end

 @implementation AppDelegate

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
     self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
     // Override point for customization after application launch.
     self.window.backgroundColor = [UIColor whiteColor];

     UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"File Action" delegate:self cancelButtonTitle:@"cancel" destructiveButtonTitle:@"load" otherButtonTitles:@"save",@"Delete", nil];
     [sheet showInView:self.window];

     [self.window makeKeyAndVisible];
     return YES;
 }

 - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
 {
     NSLog(@"Button %ld is pressed...",buttonIndex);
 }

 @end