1.关于类别覆盖原有类方法后，我们任然要想调用其原有类的方法。所用的底层转换方式
#import <Foundation/Foundation.h>
#import "CFRuntimeKit.h"
#import "CFPerson.h"
#import "CFPerson+Category1.h"
#import "CFPerson+Category2.h"
int main(int argc, const char * argv[]) {
@autoreleasepool {
CFPerson *person = [[CFPerson alloc]init];
//方法覆盖问题验证(后面编译的分类方法在最前面，优先访问它)
[person eating];
//查看方法列表
NSArray *methodArr = [CFRuntimeKit fetchMethodList:[CFPerson class]];
NSLog(@"methodArr：%@",methodArr);
/*
*调用person类的eating方法
*/
unsigned int outCount = 0;
Method *methodList = class_copyMethodList([CFPerson class], &outCount);
IMP lastImp = NULL;
SEL lastSel = NULL;
for (unsigned int i=0; i<outCount; i++) {
Method method = methodList[i];
SEL methodSEL = method_getName(method);
NSString *methodName =[NSString stringWithUTF8String:sel_getName(methodSEL)];
if ([methodName isEqualToString:@"eating"]) {
lastImp = method_getImplementation(method);
lastSel = method_getName(method);
}
}
((void (*)(id,SEL))(void *)lastImp)(person,lastSel);
free(methodList);
}
return 0;
}
