iOS通过Runtime实现友盟统计的实例代码

在友盟官网可以看到相应的步骤，申请appkey，导入sdk，然后在appdelegate里面写入相应的代码，下面就是关键的代码：

实现页面的统计需要在每个uiviewcontroller中配对调用如下方法：

  - (void)viewwillappear:(bool)animated
  {
    [super viewwillappear:animated];
    [mobclick beginlogpageview:@"pageone"];//("pageone"为页面名称，可自定义)
  }
- (void)viewwilldisappear:(bool)animated 
  {
    [super viewwilldisappear:animated];
    [mobclick endlogpageview:@"pageone"];
  }

几年之前做过这个，那时候才刚开始做ios，就按照这个文档在每一个uiviewcontroller里面写了这个方法，现在看来真是太low了。

这次又做这个友盟统计，就想起来用runtime解决这个问题。

在工程中创建一个uiviewcontroller的category，然后通过runtime动态添加两个方法，分别替代viewwillappear和viewwilldisappear方法。这样就不需要在每一个 uiviewcontroller写这段代码了。

新建一个分类：

uiviewcontroller+statistics.h

//
// uiviewcontroller+statistics.h
// tongyuanhospital
//
// created by zsp on 2017/6/16.
// copyright © 2017年 zsp. all rights reserved.
//

#import <uikit/uikit.h>

@interface uiviewcontroller (statistics)

@end

uiviewcontroller+statistics.m

//
// uiviewcontroller+statistics.m
// tongyuanhospital
//
// created by zsp on 2017/6/16.
// copyright © 2017年 zsp. all rights reserved.
//

#import "uiviewcontroller+statistics.h"

@implementation uiviewcontroller (statistics)


+ (void)load {

  //原本的viewwillapper方法
  method viewwillappear = class_getinstancemethod(self, @selector(viewwillappear:));

  //需要替换成能够输入日志的viewwillappear
  method logviewwillappear = class_getinstancemethod(self, @selector(logviewwillappear:));


  //原本的viewwilldisappear方法
  method viewwilldisappear = class_getinstancemethod(self, @selector(viewwilldisappear:));
  //需要替换成能够输入日志的viewwilldisappear
  method logviewwilldisappear = class_getinstancemethod(self, @selector(logviewwilldisappear:));

  //两方法进行交换
  method_exchangeimplementations(viewwillappear, logviewwillappear);
  method_exchangeimplementations(viewwilldisappear, logviewwilldisappear);

}
-(void)logviewwillappear:(bool)animated
{
  [self logviewwillappear:animated];  
  nsstring *selfclass = nsstringfromclass([self class]);
  [mobclick beginlogpageview:selfclass];
  //当然这里也可以使用self.title作为页面的名称，这样在友盟后台查看的时候更加方便些
  //[mobclick endlogpageview:self.title];  
}

-(void)logviewwilldisappear:(bool)animated
{
  [self logviewwilldisappear:animated];
  nsstring *selfclass = nsstringfromclass([self class]);
  [mobclick endlogpageview:selfclass];
}


@end

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