Iphone 为什么UIScrollViewDelegate不工作?
我有一个名为“HaveScrollController”的viewController,如下所示:Iphone 为什么UIScrollViewDelegate不工作?,iphone,objective-c,iphone-sdk-3.0,Iphone,Objective C,Iphone Sdk 3.0,我有一个名为“HaveScrollController”的viewController,如下所示: @interface HaveScrollController : UIViewController <UIScrollViewDelegate>{ IBOutlet UIScrollView *scrollView; IBOutlet UIView *firstView; IBOutlet UIView *secondView; IBOutlet UI
@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
@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
我已经与IB建立了所有连接。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;
}
当我尝试滚动视图时,但未显示“检测到滚动”。我做错了什么?多谢各位 是否有
滚动视图
滚动?您似乎忘记设置contentSize
:
scrollView.contentSize = CGSizeMake(320, 400);
显然,请确保
contentSize
大于scrollView的
框架,以便滚动操作开始。不过,我很确定您仍然需要指定contentSize。我看不到任何地方可以在IB中指定,所以您可能需要在代码中,在viewDidLoad中这样做。
scrollView.contentSize = CGSizeMake(320, 400);