埋点是一种了解用户行为,分析用户行为,提升用户体验的一种方式。 常见的解决方案有三种,代码埋点、可视化埋点、和无埋点三种。bash
无埋点能够作到,埋点被统一维护,与业务代码解耦,知足大部分需求。markdown
无埋点的实现主要是基于,runtime,在运行时,替换原有方法,实现埋点。app
新建一个class,主要代码以下,ide
#import "SMHook.h" #import <objc/runtime.h> @implementation SMHook +(void)hookClass:(Class)classObject fromSelector:(SEL)fromSelector toSelector:(SEL)toselector{ Class class = classObject; // 获得被替换类的实例方法 Method fromMethod = class_getInstanceMethod(class, fromSelector); // 获得替换类的实例方法 Method toMethod = class_getInstanceMethod(class, toselector); if (class_addMethod(class, fromSelector, method_getImplementation(toMethod), method_getTypeEncoding(fromMethod))) { class_replaceMethod(class, toselector, method_getImplementation(fromMethod), method_getTypeEncoding(toMethod)); }else{ method_exchangeImplementations(fromMethod, toMethod); } } @end 复制代码
其中主要的做用是交换两个IMP指针的实现spa
method_exchangeImplementations(Method _Nonnull m1, Method _Nonnull m2)
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IMP是具体方法的实现。指针
分析:获取页面的停留时间,主要hook住UIViewController
的viewWillAppear:
和 viewWillDisappear:
的两个方法,获取执行这两个方法的时间差,就能够获取停留时长 ,给UIViewController
建一个Category
实现方法code
#import "ViewController+time.h" #import "SMHook.h" @implementation UIViewController (logger) +(void)initialize{ static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ SEL fromSelector = @selector(viewWillAppear:); SEL toSelector = @selector(hook_viewWillAppear:); [SMHook hookClass:self fromSelector:fromSelector toSelector:toSelector]; SEL fromDisappear = @selector(viewWillDisappear:); SEL toDisappear = @selector(hook_viewWillDisAppear:); [SMHook hookClass:self fromSelector:fromDisappear toSelector:toDisappear]; }); } 复制代码
hook方法的实现orm
-(void)hook_viewWillAppear:(BOOL)animated{ NSLog(@"hook viwe"); // 进来的时间 根据具体的业务去加时间的统计 [self comeIn]; [self hook_viewWillAppear:animated]; } -(void)hook_viewWillDisAppear:(BOOL)animated{ // 出去的时间 统计方法根据具体的业务加 [self comeOut]; [self hook_viewWillDisAppear:animated]; } 复制代码
注意: 在实现了 hook_viewWillAppear:
方法后,又调用了一遍 [self hook_viewWillAppear:animated]
;这里的IMP执行的是viewWillAppear:
方法,注意前面的对象
method_exchangeImplementations(Method _Nonnull m1, Method _Nonnull m2)
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方法,这样不会由于hook住viewWillAppear:
的实现,而影响了业务代码中,viewWillAppear:
内容的实现,并不会形成循环调用。事件
UIButton的点击事件的hook和UIViewController
的viewWillAppear:
的hook基本上同样, 这里面要hook的是:
// send the action. the first method is called for the event and is a point at which you can observe or override behavior. it is called repeately by the second.
- (void)sendAction:(SEL)action to:(nullable id)target forEvent:(nullable UIEvent *)event; 复制代码
这个方法,在点击的时候会被调用。 不是
- (void)addTarget:(nullable id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents; 复制代码
这个方法。
给UIButton新建Category,主要有三步
#import "UIButton+logger.h" #import "SMHook.h" #import <objc/runtime.h> @implementation UIButton (logger) +(void)initialize{ static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ SEL fromSelector = @selector(sendAction:to:forEvent:); SEL toSelector = @selector(hook_sendAction:to:forEvent:); [SMHook hookClass:self fromSelector:fromSelector toSelector:toSelector]; }); } -(void)hook_sendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event{ [self insertAction:action to:target forEvent:event]; [self hook_sendAction:action to:target forEvent:event]; } -(void)insertAction:(SEL)action to:(id)target forEvent:(UIEvent*)event{ NSString * actionName = NSStringFromSelector(action); NSString * targetName = NSStringFromClass([target class]); NSString *name = self.name; UIView *targetView = (UIView *)target; NSLog(@"%@",targetView); NSLog(@"button name == %@ actionName == %@, targetName == %@",name, actionName,targetName); // 缺乏获取view_path的方法 NSLog(@"viewPath %@",viewPath); } 复制代码
这里有个关键,不单单是UIButton,而是任何你想Hook住对象的View_Path
每一个控件须要有惟一的标识,这样才能对其埋点进行分析,若是一个视图下有多个UIButton,这样就不能仅仅经过 actionName 和 targetName 对齐分析 有一种解决办法是经过视图的层级结构,树状结构来分析 以下:
ViewController[0]/UIView[0]/UITableView[0]/UITableViewCell[0:2]/UIButton[0]
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其中:
UITableViewCell
和 UICollectionViewCell
及相似的自定义组件,序号部分由两部分组成:section
和 row
,并以: 拼接。具体的实现:
+(NSString *)viewPath:(UIView *)currentView{ __block NSString *viewPath = @""; for (UIView *view = currentView;view;view = view.superview) { NSLog(@"%@",view); if ([view isKindOfClass:[UICollectionViewCell class]]) { // 是一个 UICollectionViewCell *cell = (UICollectionViewCell *)view; UICollectionView *cv = (UICollectionView *)cell.superview; NSIndexPath *indexPath = [cv indexPathForCell:cell]; NSString *className = NSStringFromClass([cell class]); viewPath = [NSString stringWithFormat:@"%@[%ld:%ld]/%@",className,indexPath.section,indexPath.row,viewPath]; continue; } if ([view isKindOfClass:[UITableViewCell class]]) { // 是一个 UITableViewCell *cell = (UITableViewCell *)view; UITableView *tb = (UITableView *)cell.superview; NSIndexPath *indexPath = [tb indexPathForCell:cell]; NSString *className = NSStringFromClass([cell class]); viewPath = [NSString stringWithFormat:@"%@[%ld:%ld]/%@",className,indexPath.section,indexPath.row,viewPath]; continue; } if ([view isKindOfClass:[UIView class]]) { [view.superview.subviews enumerateObjectsUsingBlock:^(__kindof UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) { if (obj == view) { NSString *className = NSStringFromClass([view class]); viewPath = [NSString stringWithFormat:@"%@[%ld]/%@",className,idx,viewPath]; *stop = YES; } }]; } UIResponder *responder = [view nextResponder]; if ([responder isKindOfClass:[UIViewController class]]) { NSString *className = NSStringFromClass([responder class]); viewPath = [NSString stringWithFormat:@"%@/%@",className,viewPath]; return viewPath; } } return viewPath; } 复制代码
感受不是最优解,哈哈, 以上能够拿到。一个元素在当前控制器的路径。能够以此进行数据分析。 以上结束。谢谢!