isKindOfClass和isMemberOfClass的区别

isKindOfClass 当子类是该类的派生类或者父类时, 返回值是YES;

isMemberOfClass 只有当子类是该类的类型时,返回YES

UILabel *label = [[UILabelnew]autorelease];

if ([label isKindOfClass:[UILabelclass]]) {
NSLog(@" is KindOfClass? YES!");
}
if ([label isKindOfClass:[NSObjectclass]]) {
NSLog(@" is KindOfClass? YES!");
}
if ([label isMemberOfClass:[UILabel class]]) {
NSLog(@" is MemberOfClass? YES!");
}
if ([label isMemberOfClass:[NSObject class]]) {
NSLog(@" is MemberOfClass? NO!");
}

//运行结果如下:

2015-10-10 10:18:50.425 KindClass[1827:73759]  is KindOfClass? YES!

2015-10-10 10:18:50.426 KindClass[1827:73759]  is KindOfClass? YES!

2015-10-10 10:18:50.426 KindClass[1827:73759]  is MemberOfClass? YES!

2015-10-10 10:18:50.426 KindClass[1827:73759]  is MemberOfClass? NO!

//但是当子类对象是NS;类型时 isKindOfClass不受影响,而isMemberOfClass返回值一直是NO


NSMutableArray *array = [[[NSMutableArrayalloc]init]autorelease];

if ([array isKindOfClass:[NSArrayclass]]) {
NSLog(@" is KindOfClass? YES!");
}
if ([array isKindOfClass:[NSObjectclass]]) {
NSLog(@" is KindOfClass? YES!");
}
if ([array isMemberOfClass:[NSArray class]]) {
NSLog(@" is MemberOfClass? YES!");
}

if (![array isMemberOfClass:[NSObjectclass]]) {
NSLog(@" is MemberOfClass? NO!");
}

//运行结果如下:

2015-10-10 10:35:48.262 KindClass[1906:79483]  is KindOfClass? YES!

2015-10-10 10:35:48.263 KindClass[1906:79483]  is KindOfClass? YES!

2015-10-10 10:35:48.263 KindClass[1906:79483]  is MemberOfClass? NO!