self.viewDelegate = 0x0 为什么？

发布于 2024-09-28 21:19:25 字数 501 浏览 0 评论 0原文

在下面的代码中 self.viewDelegate是0x0，我不知道如何解决这个问题。我应该去界面生成器吗？

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [[event allTouches] anyObject]; 
    if ([touch tapCount] == 2) {
        if ([self.viewDelegate respondsToSelector:@selector(openFlowView:doubleTapOnIndex:itemView:)])
            [self.viewDelegate openFlowView:self doubleTapOnIndex:selectedCoverView.number itemView:selectedCoverView];
        }

原文

In the following code the
self.viewDelegate is 0x0 and I don't know how to solve
this problem. Should I have to go to the interface Builder?

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [[event allTouches] anyObject]; 
    if ([touch tapCount] == 2) {
        if ([self.viewDelegate respondsToSelector:@selector(openFlowView:doubleTapOnIndex:itemView:)])
            [self.viewDelegate openFlowView:self doubleTapOnIndex:selectedCoverView.number itemView:selectedCoverView];
        }

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眼眸里的那抹悲凉 2024-10-05 21:19:25

viewDelegate 未定义。
通常，在Apple类中，视图委托只是调用委托。您应该从某个地方获取此代码。
您必须在代码（不是 IB）中定义 viewDelegate

self.viewDelegate=xxxx;

xxxx 必须是您的委托。代表可以是自己！

有关委托说明，请参阅 Apple 文档

viewDelegate is not defined.
Usually, in Apple class, view delegate is just call delegate. You should have taken this code from somewhere.
You have to defined viewDelegate in your code (not IB)