奮斗的七月

在友盟官網可以看到相應的步驟，申請appkey，導入SDK，然后在AppDelegate里面寫入相應的代碼，下面就是關鍵的代碼：

實現頁面的統計需要在每個UIViewController中配對調用如下方法：

   - (void)viewWillAppear:(BOOL)animated
    {
        [super viewWillAppear:animated];
        [MobClick beginLogPageView:@"PageOne"];//("PageOne"為頁面名稱，可自定義)
    }
- (void)viewWillDisappear:(BOOL)animated 
    {
        [super viewWillDisappear:animated];
        [MobClick endLogPageView:@"PageOne"];
    }   

幾年之前做過這個，那時候才剛開始做iOS，就按照這個文檔在每一個UIViewController里面寫了這個方法，現在看來真是太low了。
這次又做這個友盟統計，就想起來用runtime解決這個問題。

在工程中創建一個UIViewController的Category，然后通過Runtime動態添加兩個方法，分別替代viewWillAppear和viewWillDisappear方法。這樣就不需要在每一個 UIViewController寫這段代碼了。

新建一個分類：

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:));
    
    //需要替換成能夠輸入日志的viewWillAppear
    Method logViewWillAppear = class_getInstanceMethod(self, @selector(logViewWillAppear:));
    
    
    //原本的viewWillDisappear方法
    Method viewWillDisappear = class_getInstanceMethod(self, @selector(viewWillDisappear:));
    //需要替換成能夠輸入日志的viewWillDisappear
    Method logviewWillDisappear = class_getInstanceMethod(self, @selector(logviewWillDisappear:));
    
    //兩方法進行交換
    method_exchangeImplementations(viewWillAppear, logViewWillAppear);
    method_exchangeImplementations(viewWillDisappear, logviewWillDisappear);
    
}
-(void)logViewWillAppear:(BOOL)animated
{
    [self logViewWillAppear:animated];    
    NSString *selfClass = NSStringFromClass([self class]);
    [MobClick beginLogPageView:selfClass];
    //當然這里也可以使用self.title作為頁面的名稱，這樣在友盟后臺查看的時候更加方便些
    //[MobClick endLogPageView:self.title];   
}

-(void)logviewWillDisappear:(BOOL)animated
{
    [self logviewWillDisappear:animated];
    NSString *selfClass = NSStringFromClass([self class]);
    [MobClick endLogPageView:selfClass];
}


@end