iskindofclass和ismemberofclass比较一个对象是否是类的成员及区别
2013-10-16 19:24
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sMemberOfClass和isKindOfClass之间区别是:我们可以使用isKindOfClass来确定一个对象是否是一个类的成员,或者是派生自该类的成员。
例如:我们已经成NSObject派生了自己的类,isMemberOfClass不能检测任何的类都是基于NSObject类这一事实,而isKindOfClass可以。
[[NSMutableData data] isKindOfClass:[NSData class]]; // YES
[[NSMutableData data] isMemberOfClass:[NSData class]]; // NO
例子1如下:
int main (int argc, const char * argv[]) {
// insert code here...
Class1 *c1=[Class1 new];
if ([c1 isKindOfClass: [NSObject class]]==YES) {
printf("c1 is a kind of NSObject . \n");
}
return 0;
}
输出结果;
c1 is a kind of NSObject .
例子2如下:
int main (int argc, const char * argv[]) {
// insert code here...
Class1 *c1=[Class1 new];
Class2 *c2=[Class2 new];
if ([c1 isMemberOfClass:[Class1 class]]==YES) {
printf("c1 is Member of Class1 !\n\n");
}
if ([c2 isMemberOfClass:[Class2 class]]==YES) {
printf("c2 is Member of Class2 !\n\n");
}
return 0;
}
输出结果:
c1 is Member of Class1 !
c2 is Member of Class2 !
例如:我们已经成NSObject派生了自己的类,isMemberOfClass不能检测任何的类都是基于NSObject类这一事实,而isKindOfClass可以。
[[NSMutableData data] isKindOfClass:[NSData class]]; // YES
[[NSMutableData data] isMemberOfClass:[NSData class]]; // NO
例子1如下:
int main (int argc, const char * argv[]) {
// insert code here...
Class1 *c1=[Class1 new];
if ([c1 isKindOfClass: [NSObject class]]==YES) {
printf("c1 is a kind of NSObject . \n");
}
return 0;
}
输出结果;
c1 is a kind of NSObject .
例子2如下:
int main (int argc, const char * argv[]) {
// insert code here...
Class1 *c1=[Class1 new];
Class2 *c2=[Class2 new];
if ([c1 isMemberOfClass:[Class1 class]]==YES) {
printf("c1 is Member of Class1 !\n\n");
}
if ([c2 isMemberOfClass:[Class2 class]]==YES) {
printf("c2 is Member of Class2 !\n\n");
}
return 0;
}
输出结果:
c1 is Member of Class1 !
c2 is Member of Class2 !
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