Test1.h
@interface Test1 : NSObject
- (void)objectFun;
+ (void)classFun;
@end
Test1.m
@implementation Test1
- (void)objectFun
{
NSLog(@"object function");
}
+ (void)classFun
{
NSLog(@"class function");
}
@end
測試類：
BOOL flag;
flag = [Test1 instancesRespondToSelector:@selector(objectFun)]; //YES
flag = [Test1 instancesRespondToSelector:@selector(classFun)]; //NO
flag = [Test1 respondsToSelector:@selector(objectFun)]; //NO
flag = [Test1 respondsToSelector:@selector(classFun)]; //YES
Test1 *obj = [[Test1 alloc] init];
flag = [obj respondsToSelector:@selector(objectFun)]; //YES
flag = [obj respondsToSelector:@selector(classFun)]; //NO
總結：
instancesRespondToSelector只能寫在類名后面，respondsToSelector可以寫在類名和實例名后面。
[類 instancesRespondToSelector]判斷的是該類的實例是否包含某方法亥至，等效于：[該類的實例 respondsToSelector]窍仰。
[類 respondsToSelector]用于判斷是否包含某個類方法疼约。
