oc runtime动态调用方法

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oc runtime 动态调用方法

首先文章是参考: https://www.jianshu.com/p/0280e95bebeb

根据方法名获取方法对应的SEL类型数据，

再根据SEL获取方法指针IMP

最后根据IMP定义方法，运行。

调用无参方法：

       SEL selector = NSSelectorFromString(@"方法名");       IMP imp = [self methodForSelector:selector];       void (*func)(id, SEL) = (void *)imp;       func(self, selector);

调用有参和有返回值的方法:

       SEL selector = NSSelectorFromString(@"方法名");       IMP imp = [self methodForSelector:selector];       id (*func)(id, SEL,NSString *, NSArray *) = (void *)imp;       id ret = func(self, selector,@"1",@[@"1",@"2"]);

如果是调用实例方法:

SEL selector = NSSelectorFromString(@"方法名");IMP imp = [self instanceMethodForSelector:selector];id (*func)(id, SEL,NSString *, NSArray *) = (void *)imp;id ret = func(self, selector,@"1",@[@"1",@"2"]);

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