iOS - 不兼容的指针类型

Question

我收到警告：

incompatible pointer types assigning to 'UIImageView' from 'UIView'

使用此代码：

if ([gestureRecognizer.view isKindOfClass:[UIImageView class]]) {
    curgraphicview = gestureRecognizer.view;
}

代码确实有效。但是在这种情况下，我怎样才能做到没有警告？

Answer 1

你必须转换它来告诉编译器你确定它是一个 UIImageView

if ([gestureRecognizer.view isKindOfClass:[UIImageView class]]) {
    curgraphicview = (UIImageView *)gestureRecognizer.view;
}