Question

我有一个名为“HaveScrollController”的viewController，这是这样的：

@interface HaveScrollController : UIViewController <UIScrollViewDelegate>{
    IBOutlet UIScrollView *scrollView;
    IBOutlet UIView *firstView;
    IBOutlet UIView *secondView;
    IBOutlet UIView *thridView;
    IBOutlet UIView *fourthView;
}


@property (retain, nonatomic) UIScrollView *scrollView;
@property (retain, nonatomic) UIView *firstView;
@property (retain, nonatomic) UIView *secondView;
@property (retain, nonatomic) UIView *thridView;
@property (retain, nonatomic) UIView *fourthView;


@end

和.m是这样的：

@synthesize scrollView,firstView,secondView,thridView,fourthView;
- (void)viewDidLoad {
    [super viewDidLoad];
    [self.view addSubview:scrollView];

    scrollView.delegate = self;
}


- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
    NSLog(@"scroll detected");
}

@end

我已经完成了与IB的所有连接。我想在我的“TestAppController”中使用这个控制器，就像这样，它不使用IB，并使用代码生成接口：

@interface TestAppController : UIViewController <UIScrollViewDelegate,UIActionSheetDelegate, UITextFieldDelegate> {
    HaveScrollController *scollViewController;
}

.m在loadView方法中是这样的：

scollViewController = [[HaveScrollController alloc] initWithNibName:@"HaveScrollView" bundle:nil];

[mainCanvas addSubview: buttomScollViewController.view];
self.view = mainCanvas;
[mainCanvas release];

当我尝试滚动视图时，但未显示“检测到滚动”。我做错了什么？谢谢。

Answer 1

scrollView是否完全滚动？您似乎忘了设置contentSize：

scrollView.contentSize = CGSizeMake(320, 400);

显然，请确保contentSize大于scrollView's框架，以便滚动操作启动。

为什么UIScrollViewDelegate不起作用？

1 个答案: