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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
测试类：
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
总结：
1. instancesRespondToSelector只能写在类名后面，respondsToSelector可以写在类名和实例名后面。
2. [类 instancesRespondToSelector]判断的是该类的实例是否包含某方法，等效于：[该类的实例 respondsToSelector]。
3. [类 respondsToSelector]用于判断是否包含某个类方法
instancesRespondToSelector与respondsToSelector的区别
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原文地址：http://www.cnblogs.com/xuqf2iOS/p/5721320.html
