ARC下动态调用方法 - OurCoders (我们程序员)

SEL selector = NSSelectorFromString(methodString);
if ([self respondsToSelector:selector]) {
 //[self performSelector:selector withObject:parameterString];
 IMP imp = [self methodForSelector:selector];
 void (*func)(id, SEL, NSString *) = (void *)imp;
 func(self, selector, URLString);
}