ios7 uipopovercontroller

@interface  () <UIAlertViewDelegate>//private delegate

@property (nonatomic, strong) UIPopoverController *myPopoverController;
@property (nonatomic, strong) UIBarButtonItem *barButtonAdd;
@end

@implementation 

- (NSString *) photoButtonTitle{
    return @"Photo";
}

- (NSString *) audioButtonTitle{
    return @"Audio";
}


- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex{
    NSString *buttonTitle = [alertView buttonTitleAtIndex:buttonIndex];
    
    if ([buttonTitle isEqualToString:[self photoButtonTitle]]){
        NSLog(@"Photo");
        /* Adding a photo ... */
    }
    else if ([buttonTitle isEqualToString:[self audioButtonTitle]]){
        NSLog(@"Audio");
        /* Adding an audio... */
    }
    
}

- (void) performAddWithAlertView:(id)paramSender{
    //iPhone弹警告
    [[[UIAlertView alloc] initWithTitle:nil
                                message:@"Add..."
                               delegate:self
                      cancelButtonTitle:@"Cancel"
                      otherButtonTitles:
      [self photoButtonTitle],
      [self audioButtonTitle], nil] show];
    
}

- (void) performAddWithPopover:(id)paramSender{
    //popover展示barButtonAdd
    //UIPopoverArrowDirectionAny剪头方向
    [self.myPopoverController presentPopoverFromBarButtonItem:self.barButtonAdd permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
    
}

- (void)viewDidLoad{
    [super viewDidLoad];
    
    /* See if this class exists on the iOS running the app */
    //声明popoverClass ＝ UIPopoverController
    Class popoverClass = NSClassFromString(@"UIPopoverController");
    //如果有UIPopoverController 并且是iPad
    if (popoverClass != nil && UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad){
        //创建content
        PopoverContentViewController *content = [[PopoverContentViewController alloc] initWithNibName:nil bundle:nil];
        self.myPopoverController = [[UIPopoverController alloc] initWithContentViewController:content];
        //content类的myPopoverController
        content.myPopoverController = self.myPopoverController;
        self.barButtonAdd =
        [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(performAddWithPopover:)];
    } else {
        //iPhone
        self.barButtonAdd =
        [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(performAddWithAlertView:)];
    }
    //nav右边按钮设置成barButtonAdd
    [self.navigationItem setRightBarButtonItem:self.barButtonAdd animated:NO];
    
}

@end

@property (nonatomic, weak) UIPopoverController *myPopoverController;

@interface PopoverContentViewController ()
//私有变量
@property (nonatomic, strong) UIButton *buttonPhoto;
@property (nonatomic, strong) UIButton *buttonAudio;
@end

@implementation PopoverContentViewController

- (BOOL) isInPopover{
    //声明popoverClass 为UIPopoverController类
    Class popoverClass = NSClassFromString(@"UIPopoverController");
    if (popoverClass != nil &&
        UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad &&
        self.myPopoverController != nil){
        return YES;
    } else {
        return NO;
    }
    
}

- (void) gotoAppleWebsite:(id)paramSender{
    
    if ([self isInPopover]){
        /* Go to website and then dismiss popover */
        [self.myPopoverController dismissPopoverAnimated:YES];
    } else {
        /* Handle case for iPhone */
    }
    
}

- (void) gotoAppleStoreWebsite:(id)paramSender{
    
    if ([self isInPopover]){
        /* Go to website and then dismiss popover */
        [self.myPopoverController dismissPopoverAnimated:YES];
    } else {
        /* Handle case for iPhone */
    }
    
}

- (void)viewDidLoad{
    [super viewDidLoad];
    //childView 宽，高
    self.preferredContentSize = CGSizeMake(200.0f, 125.0f);
    //按钮大小
    CGRect buttonRect = CGRectMake(20.0f,20.0f,
                                   160.0f,37.0f);
    //type：系统标准按钮
    self.buttonPhoto = [UIButton buttonWithType:UIButtonTypeSystem];
    //设置button title
    [self.buttonPhoto setTitle:@"Photo" forState:UIControlStateNormal];
    //为buttonPhoto添加事件 dismiss
    [self.buttonPhoto addTarget:self
                         action:@selector(gotoAppleWebsite:)
               forControlEvents:UIControlEventTouchUpInside];
    //坐标
    self.buttonPhoto.frame = buttonRect;
    //添加到view
    [self.view addSubview:self.buttonPhoto];
    //y轴 +50坐标
    buttonRect.origin.y += 50.0f;
    
    //type：系统标准按钮
    self.buttonAudio = [UIButton buttonWithType:UIButtonTypeSystem];
    //设置button title
    [self.buttonAudio setTitle:@"Audio"
                      forState:UIControlStateNormal];
    //为buttonAudio添加事件 dismiss
    [self.buttonAudio addTarget:self
                         action:@selector(gotoAppleStoreWebsite:)
               forControlEvents:UIControlEventTouchUpInside];
    //坐标
    self.buttonAudio.frame = buttonRect;
    //添加到view
    [self.view addSubview:self.buttonAudio];
    
}

@end