例如，在一個靜態庫中，調用外面的類的方法

// param1 （類名）? param2 (類中的方法)

NSString *param1 =@"YCAdBaiduBannerAdapter";

NSString *param2 =@"initWithAdKey:";

id class =[[NSClassFromString(param1)alloc]init];

if (class) {

SEL selector =NSSelectorFromString(param2);

if ([class respondsToSelector:selector]) {

NSInvocation *inv =[NSInvocation invocationWithMethodSignature:[class methodSignatureForSelector:selector]];

//方法中的參數 argument

NSString *argument =@"1232";

[inv setSelector:selector];

[inv setTarget:class];

[inv setArgument:&argument atIndex:2];

[inv invoke];

}

}