Question

我收到了这个恼人的警告：

警告：'AppDelegate'可能无法响应'-presentModalViewController：animated：'

在此实施文件中：

- (IBAction)showInfo:(id)sender {    

    FlipsideViewController *controller = [[FlipsideViewController alloc] initWithNibName:@"FlipsideView" bundle:nil];
    controller.delegate = self;

    controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
    [self presentModalViewController:controller animated:YES];

    [controller release];
}

在这一行：

self presentModalViewController：控制器动画：是];

这是头文件：

#import <UIKit/UIKit.h>
#import "FlipsideViewController.h"

@interface AppDelegate : NSObject <UIApplicationDelegate, UIScrollViewDelegate, FlipsideViewControllerDelegate> {
    UIWindow *window;
    UIScrollView *scrollView;
    UIPageControl *pageControl;
    NSMutableArray *viewControllers;
    UIView *flipside;
    UIImageView *infoButton;

    // To be used when scrolls originate from the UIPageControl
    BOOL pageControlUsed;
}

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet UIScrollView *scrollView;
@property (nonatomic, retain) IBOutlet UIPageControl *pageControl;
@property (nonatomic, retain) IBOutlet UIView *flipside;
@property (nonatomic, retain) IBOutlet UIImageView *infoButton;
@property (nonatomic, retain) NSMutableArray *viewControllers;

- (IBAction)showInfo:(id)sender;
- (IBAction)changePage:(id)sender;

@end

显然有些东西我没有得到，但如果有人可以提供帮助我会很感激：）

Answer 1

您必须从UIViewController的实例（而不是您的应用程序委托）中获取模态视图控制器。如果您在UIViewController上查看documentation，则可以使用模式演示文稿访问示例应用程序。

嗯，得到：可能无法响应'-presentModalViewController：animated：'

1 个答案: