通过类名和方法名，实现对函数得调用

1.BaseClass是基类，SubClass继承BaseClass,并且重写基类的manageMethod方法,通过类名@"SubClass"获取类，并通过基类调用manageMethod方法，实现工厂模式。

 NSString *className      = @"SubClass";

    NSString *param          = [dic objectForKey:@"param"];

    Class ob = NSClassFromString( className );

    BaseClass *baseObject = [[ob alloc] init];

    [baseObject manageMethod:methodName  param:param];

 

2.在subClass中实现manageMethod方法，并通过方法名调用方法,找了很久才发现有NSSelectorFromString这个方法，就不用像java那些去实现map或者去反射，大概机制应该是相同的吧。

-(void)manageMethod:(NSString *)methodName param:(NSString *)param

{

     [self performSelector:NSSelectorFromString( methodName ) withObject:param afterDelay:0];

} 

 

还有一种通过方法名调用方法的方式：http://www.cnblogs.com/tiechui/p/3819805.html

 id theClass = objc_getClass([@"SubClass" UTF8String]);

unsigned int outCount;

 Method *m =  class_copyMethodList(ob, &outCount);

for (int i = 0; i<outCount; i++) {

        SEL a = method_getName(*(m+i));

        NSString *sn = NSStringFromSelector(a);

        if ( [sn isEqualToString:methodName] ) {

             [baseObject performSelector:a withObject:param afterDelay:0 ];

        }

    }