自动播放 youtube 错误？

Question

    - (void)webViewDidFinishLoad:(UIWebView *)YouTubePlayer {
    UIButton *b = [self findButtonInView:YouTubePlayer];
    [b sendActionsForControlEvents:UIControlEventTouchUpInside];
}

- (UIButton *)findButtonInView:(UIView *)view {
    UIButton *button = nil;

    if ([view isMemberOfClass:[UIButton class]]) {
        return (UIButton *)view;
    }

    if (view.subviews && [view.subviews count] > 0) {
        for (UIView *subview in view.subviews) {
            button = [self findButtonInView:subview];
            if (button) return button;
        }
    }

    return button;
}

此代码不起作用，我在UIButton *b = [self findButtonInView:YouTubePlayer]; 行收到 2 个警告，警告是：

“YouTubePlayer”的本地声明隐藏了实例变量 “SecondViewController”可能不会响应“-findButtonInView:”

Answer 1

1. 您应该在 findButtonInView 方法中调用 [YouTubePlayer view]。
2. 在您的 SecondViewController.h 文件中，添加行 - (UIButton *)findButtonInView:(UIView *)view;。