iOS isKindOfClass判断

子类同过isKindOfClass判断是否是父类的类型时，是会返回YES的

比如：

NSMutableArray *arr01 = [[NSMutableArray alloc] initWithCapacity:1];
if ([arr01 isKindOfClass:[NSArray class]]) {
    NSLog(@"NSMutableArray is kind of class NSArray");
}
else {
    NSLog(@"NSMutableArray is NOT kind of class NSArray");
}

能够打印：

NSMutableArray is kind of class NSArray