1

我在尝试通过 UIView 将触摸事件传递到其附加的子视图时遇到了麻烦。

我有许多图像我想做各种各样的事情，所以我有兴趣阅读它们上的触摸事件。在我决定将它们分组到 UIView 之前它工作得很好，所以我猜我需要打开或关闭一些设置以让事件通过。

[TouchImageView.h] -------------------------------------------------------

@interface TouchImageView : UIImageView

[TouchImageView.m] -------------------------------------------------------

- (id)initWithFrame:(CGRect)aRect {
    if (self = [super initWithFrame:aRect]) {
        // We set it here directly for convenience
        // As by default for a UIImageView it is set to NO
        self.userInteractionEnabled = YES;
        state = 0 ;
        rect = aRect ;
    }
    return self;
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    // Do what you want here
    NSLog(@"touchesBegan!" );
}

[in my delegate's didFinishLaunchingWithOptions] -------------------------

NSArray *myImages = [NSArray arrayWithObjects:
                     [UIImage imageNamed:@"front-photos.jpg"],
                     [UIImage imageNamed:@"front-films.jpg"],
                     [UIImage imageNamed:@"front-presentations.jpg"],

mainMenuView = [[UIView alloc] init ] ;
mainMenuView.userInteractionEnabled = YES;    // tried setting this to both YES and NO. Same result.
[self.viewController.view addSubview:mainMenuView] ;

myImage = [[TouchImageView alloc] initWithFrame:CGRectMake(0.0f, menuTopHeight, menuButtonWidth, menuButtonHeight)];
[myImage setImage:[myImages objectAtIndex:0]] ;
[mainMenuView addSubview:myImage] ;

有人可以告诉我我做错了什么吗？我在这里看到了很多关于这个主题的类似帖子，但其中大部分是关于设置 userInteractionEnabled(?)

4

2 回答 2

1

事实证明，我需要为 UIView 定义一个框架。所以我改变了

mainMenuView = [[UIView alloc] init] ;

进入这个：

mainMenuView = [[UIView alloc] initWithFrame:[UIScreen mainScreen] bounds] ;

它再次起作用。

于 2012-06-25T10:58:26.250 回答
0

首先mainMenuView.userInteractionEnabled = NO;应该YES 也是默认设置UIImageView为userInteractionEnabledNO，所以你必须将它设置为YES

在这条线之后

[mainMenuView addSubview:myImage] ;
//add
myImage.userInteractionEnabled = YES;
于 2012-06-25T09:21:51.613 回答