『ios』無痕埋點探索 (頁面顯示 UIButton UIGestureRecognizer)

這是一篇無痕埋點方案的探索，學到的東西，怕忘記了，所以記下來，就這樣。
我們在平時的項目中，會用到埋點這個功能吧，如果頁面很少，還好說，我們可以手動進行埋點，如果是頁面變多，那么手動埋點將會變得非常的浪費時間和效率，所以無痕埋點就這樣誕生了。

講無痕埋點之前先放一個方法。

交換方法

+(void)swizzingForClass:(Class)cls originalSel:(SEL)originalSelector swizzingSel:(SEL)swizzingSelector
{
    Class class = cls;
    Method originalMethod = class_getInstanceMethod(class, originalSelector);
    Method  swizzingMethod = class_getInstanceMethod(class, swizzingSelector);
    
    BOOL addMethod = class_addMethod(class,
                                     originalSelector,
                                     method_getImplementation(swizzingMethod),
                                     method_getTypeEncoding(swizzingMethod));
    
    if (addMethod) {
        class_replaceMethod(class,
                            swizzingSelector,
                            method_getImplementation(originalMethod),
                            method_getTypeEncoding(originalMethod));
    }else{
        
        method_exchangeImplementations(originalMethod, swizzingMethod);
    }
}

因為埋點的精髓部分在于對數(shù)據(jù)的處理，所以別急，繼續(xù)往下看。

對于頁面顯示隱藏方面的埋點該怎么做呢？沒錯就是對viewWillAppear viewWillDisappear viewDidLoad進行交換，然后監(jiān)聽。

+(void)load
{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        SEL originalAppearSelector = @selector(viewWillAppear:);
        SEL swizzingAppearSelector = @selector(user_viewWillAppear:);
        [MethodSwizzingTool swizzingForClass:[self class] originalSel:originalAppearSelector swizzingSel:swizzingAppearSelector];
        
        SEL originalDisappearSelector = @selector(viewWillDisappear:);
        SEL swizzingDisappearSelector = @selector(user_viewWillDisappear:);
        [MethodSwizzingTool swizzingForClass:[self class] originalSel:originalDisappearSelector swizzingSel:swizzingDisappearSelector];
        
        SEL originalDidLoadSelector = @selector(viewDidLoad);
        SEL swizzingDidLoadSelector = @selector(user_viewDidLoad);
        [MethodSwizzingTool swizzingForClass:[self class] originalSel:originalDidLoadSelector swizzingSel:swizzingDidLoadSelector];
        
    });
}

那對于按鈕的點擊監(jiān)聽呢？別忘了這個方法sendAction:to:forEvent:。

 SEL originalSelector = @selector(sendAction:to:forEvent:);
        SEL swizzingSelector = @selector(user_sendAction:to:forEvent:);
        [MethodSwizzingTool swizzingForClass:[self class] originalSel:originalSelector swizzingSel:swizzingSelector];

那如何定位到到點擊了哪個btn呢？先看數(shù)據(jù)結(jié)構(gòu)吧

"ACTION": {
        "ViewController/jumpSecond/0": {
            "userDefined": {
                "eventid": "201803074|93",
                "target": "",
                "pageid": "234",
                "pagename": "button點擊，跳轉(zhuǎn)至下一個頁面"
            },
            "pagePara": {
                "testKey9": {
                    "propertyName": "testPara",
                    "propertyPath":"",
                    "containIn": "0"
                }
            }
        },
        
        "SecondViewController/back": {
            "userDefined": {
                "eventid": "201803074|965",
                "target": "second",
                "pageid": "234",
                "pagename": "button點擊，返回"
            },
            "pagePara": {
                "testKey9": {
                    "propertyName": "testPara",
                    "propertyPath":"",
                    "containIn": "0"
                }
            }
        }
    },

再來看監(jiān)聽的事件

-(void)user_sendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event
{
    [self user_sendAction:action to:target forEvent:event];
    
    NSString * identifier = [NSString stringWithFormat:@"%@/%@/%ld", [target class], NSStringFromSelector(action),self.tag];
    NSDictionary * dic = [[[DataContainer dataInstance].data objectForKey:@"ACTION"] objectForKey:identifier];
    if (dic) {
        
        NSString * eventid = dic[@"userDefined"][@"eventid"];
        NSString * targetname = dic[@"userDefined"][@"target"];
        NSString * pageid = dic[@"userDefined"][@"pageid"];
        NSString * pagename = dic[@"userDefined"][@"pagename"];
        NSDictionary * pagePara = dic[@"pagePara"];
        __block NSMutableDictionary * uploadDic = [NSMutableDictionary dictionaryWithCapacity:0];
        [pagePara enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key, id  _Nonnull obj, BOOL * _Nonnull stop) {
            
            id value = [CaptureTool captureVarforInstance:target withPara:obj];
            if (value && key) {
                [uploadDic setObject:value forKey:key];
            }
        }];
        NSLog(@"\n event id === %@,\n  target === %@, \n  pageid === %@,\n  pagename === %@,\n pagepara === %@ \n", eventid, targetname, pageid, pagename, uploadDic);

    }
}

可以看到identifier @"ViewController/jumpSecond/0"
我們根據(jù)當前所在的類 跳轉(zhuǎn)的方法 按鈕的tag 來找到那個btn，進行進行打點。


image.png

對于手勢的監(jiān)聽呢？這個跟btn這些就不太一樣了。這個需要監(jiān)聽設(shè)置代理的方法。initWithTarget:action:

+ (void)load
{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        
        [MethodSwizzingTool swizzingForClass:[self class] originalSel:@selector(initWithTarget:action:) swizzingSel:@selector(vi_initWithTarget:action:)];
    });
}

然后添加關(guān)于sel_ SEL "UIDimmingView/handleSingleTap:" 的方法實現(xiàn)responseUser_gesture，具體UIDimmingView是什么可以自行打印查看。然后與handleSingleTap進行方法交換。

- (instancetype)vi_initWithTarget:(nullable id)target action:(nullable SEL)action
{
    UIGestureRecognizer *selfGestureRecognizer = [self vi_initWithTarget:target action:action];
    
    if (!target && !action) {
        return selfGestureRecognizer;
    }
    
    if ([target isKindOfClass:[UIScrollView class]]) {
        return selfGestureRecognizer;
    }
    
    Class class = [target class];
    
    
    SEL sel = action;
    
    NSString * sel_name = [NSString stringWithFormat:@"%s/%@", class_getName([target class]),NSStringFromSelector(action)];
    SEL sel_ =  NSSelectorFromString(sel_name);
    
    BOOL isAddMethod = class_addMethod(class,
                                       sel_,
                                       method_getImplementation(class_getInstanceMethod([self class], @selector(responseUser_gesture:))),
                                       nil);
    //看到這里別疑惑，這里是我們給UIGestureRecognizer添加的屬性。
    self.methodName = NSStringFromSelector(action);
    if (isAddMethod) {
        Method selMethod = class_getInstanceMethod(class, sel);
        Method sel_Method = class_getInstanceMethod(class, sel_);
        method_exchangeImplementations(selMethod, sel_Method);
    }
    
    return selfGestureRecognizer;
}

然后我們可以實現(xiàn)responseUser_gesture


-(void)responseUser_gesture:(UIGestureRecognizer *)gesture
{
    
    NSString * identifier = [NSString stringWithFormat:@"%s/%@", class_getName([self class]),gesture.methodName];
    
    SEL sel = NSSelectorFromString(identifier);
    if ([self respondsToSelector:sel]) {
        IMP imp = [self methodForSelector:sel];
        void (*func)(id, SEL,id) = (void *)imp;
        func(self, sel,gesture);
    }
    
    
    NSDictionary * dic = [[[DataContainer dataInstance].data objectForKey:@"GESTURE"] objectForKey:identifier];
    if (dic) {
        
        NSString * eventid = dic[@"userDefined"][@"eventid"];
        NSString * targetname = dic[@"userDefined"][@"target"];
        NSString * pageid = dic[@"userDefined"][@"pageid"];
        NSString * pagename = dic[@"userDefined"][@"pagename"];
        NSDictionary * pagePara = dic[@"pagePara"];
        
        __block NSMutableDictionary * uploadDic = [NSMutableDictionary dictionaryWithCapacity:0];
        [pagePara enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key, id  _Nonnull obj, BOOL * _Nonnull stop) {
            id value = [CaptureTool captureVarforInstance:self withPara:obj];
            if (value && key) {
                [uploadDic setObject:value forKey:key];
            }
        }];
        
        NSLog(@"\n event id === %@,\n  target === %@, \n  pageid === %@,\n  pagename === %@,\n pagepara === %@ \n", eventid, targetname, pageid, pagename, uploadDic);
        
    }
}

我們可以根據(jù)手勢所在的類名和方法來確定這是哪一個手勢。當然如果你可以保證手勢名字的唯一性。直接用名字也可以。


image.png
"GESTURE": {
        "ViewController/gesture1clicked:":{
            "userDefined": {
                "eventid": "201803074|93",
                "target": "",
                "pageid": "手勢1對應的id",
                "pagename": "手勢1對應的page name"
            },
            "pagePara": {
                "testKey1": {
                    "propertyName": "testPara",
                    "propertyPath":"",
                    "containIn": "0"
                }
                
            }
        },
        "ViewController/gesture2clicked:":{
            "userDefined": {
                "eventid": "201803074|93",
                "target": "",
                "pageid": "手勢2對應的id",
                "pagename": "手勢2對應的page name"
            },
            "pagePara": {
                "testKey2": {
                    "propertyName": "testPara",
                    "propertyPath":"",
                    "containIn": "0"
                }
                
            }
        },
        
        "SecondViewController/gesture3clicked:":{
            "userDefined": {
                "eventid": "201803074|98",
                "target": "",
                "pageid": "gesture3clicked",
                "pagename": "手勢3對應的page name"
            },
            "pagePara": {
                "user_age": {
                  
                }
                
            }
        }
    }

對于埋點配置參數(shù)方面內(nèi)容，另開一篇來說。因為還涉及到tableView和collectionView.

站在巨人的肩膀上才能看的更遠，不斷學習才能成長的更快。

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