if ([scrollView isKindOfClass:[UIView class]]) {
    NSLog(@"scrollView is isKindOfClass UIView");
}

if ([scrollView isKindOfClass:[UIScrollView class]]) {
    NSLog(@"scrollView is isKindOfClass UIScrollView");
}

if ([scrollView isMemberOfClass:[UIView class]]) {
    NSLog(@"scrollView is isMemberOfClass UIView");
}

if ([scrollView isMemberOfClass:[UIScrollView class]]) {
    NSLog(@"scrollView isMemberOfClass UIScrollView");
}

輸出結(jié)果：
scrollView is isKindOfClass UIView
scrollView is isKindOfClass UIScrollView
scrollView isMemberOfClass UIScrollView

結(jié)論：
isMemberOfClass 用于判斷（實例對象）和（對象的創(chuàng)建類）
isKindOfClass 用于判斷（實例對象）和（對象的創(chuàng)建類或繼承的類）