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KNHook

性能损耗

状态        平均耗时       次数
不加之前 0.000213s 20000次
函数副本方法     0.000579s     20000次
存IMP指针方法    0.000587s     20000次

不同设备之间会存在差异

函数副本方法：

所有方法都加上 KNHook_前缀 副本方法IMP指针使用原方法的

存IMP指针方法

将IMP指针转成long 存入字典中

        //缓存
        _IMP imp = method_getImplementation(method);
        
        NSNumber *pNumber = [NSNumber numberWithLong:(long)imp];
        
        [impDict setObject:pNumber forKey:NSStringFromSelector(methodSel)];
        
        //使用
        NSNumber *pNumber = [impDict objectForKey:NSStringFromSelector(invocation.selector)];
        
        long *p = (long *)[pNumber longValue];
        
        _IMP imp = (_IMP)p;
        
        [invocation invokeUsingIMP:imp];

勾某个类的所有方法的，查看所有方法的执行顺序

使用方法

[KNHook hookClass:@"TenpayPasswordCtrl"];

常规使用：

放在只执行一次的函数里，防止多次勾一个函数 如

  • (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

hook：

attribute((constructor)) static void entry()

放这里面

打日志的printf 改成 nslog

在终端那个应用里面就能看到日志

Nov 2 15:08:36 iPhone WeChat[2499] : KNHooklog :-(void)appendPsw:(have 1 value) return:(null) value1:__NSCFString-->7 object:<TenpayPasswordCtrl: 0x1750a620; baseClass = UITextField; frame = (0 0; 246 42); text = ''; clipsToBounds = YES; opaque = NO; gestureRecognizers = <NSArray: 0x17635150>; layer = <CALayer: 0x175218b0>> ########################################## Nov 2 15:08:36 iPhone WeChat[2499] : [RedRobert] Tweak.xm:350 DEBUG: -[<TenpayPasswordCtrl: 0x1750a620> appendPsw:7] Nov 2 15:08:36 iPhone WeChat[2499] : KNHooklog :-(void)onChange(have 0 value) return:(null) object:<TenpayPasswordCtrl: 0x1750a620; baseClass = UITextField; frame = (0 0; 246 42); text = ''; clipsToBounds = YES; opaque = NO; gestureRecognizers = <NSArray: 0x17635150>; layer = <CALayer: 0x175218b0>> ########################################## Nov 2 15:08:36 iPhone WeChat[2499] : [RedRobert] Tweak.xm:356 DEBUG: -[<TenpayPasswordCtrl: 0x1750a620> onChange] Nov 2 15:08:36 iPhone WeChat[2499] : KNHooklog :-(id)ctrlDelegate(have 0 value) return:(null) object:<TenpayPasswordCtrl: 0x1750a620; baseClass = UITextField; frame = (0 0; 246 42); text = ''; clipsToBounds = YES; opaque = NO; gestureRecognizers = <NSArray: 0x17635150>; layer = <CALayer: 0x175218b0>> ##########################################

微信

[KNHook hookClass:@"WCPayLogicMgr"];

[KNHook hookClass:@"WCRedEnvelopesLogicMgr"];

[KNHook hookClass:@"ContactUpdateHelper"];

[KNHook hookClass:@"WCRedEnvelopesNetworkHelper"];

[KNHook hookClass:@"WCRedEnvelopesReceiveHomeView"]

#ANYMethodLog

《追踪方法调用顺序：》

[ANYMethodLog logMethodWithClass:@"ViewController"];

ov 23 10:27:46 iPhone WeChat[7309] : 《before》方法调用deep: [target:<TenpayPasswordCtrl: 0x17d3da20; baseClass = UITextField; frame = (0 0; 0 0); transform = [0, 0, 0, 0, 0, 0]; alpha = 0; opaque = NO; layer = (null)> 《selector》: initWithFrame:{{0, 0}, {246, 42}} AndImage:<UIImage: 0x17d3d810> ] Nov 23 10:27:46 iPhone WeChat[7309] : 《before》方法调用deep:- [target:<TenpayPasswordCtrl: 0x17d3da20; baseClass = UITextField; frame = (0 0; 246 42); text = ''; clipsToBounds = YES; opaque = NO; layer = <CALayer: 0x17d3eb30>> 《selector》: setSaltVal:unknown ] Nov 23 10:27:46 iPhone WeChat[7309] : 《after》方法调用deep:- [target:<TenpayPasswordCtrl: 0x17d3da20; baseClass = UITextField; frame = (0 0; 246 42); text = ''; clipsToBounds = YES; opaque = NO; layer = <CALayer: 0x17d3eb30>> 《selector》: setSaltVal:unknown ] 返回值:void interval:0.000018 Nov 23 10:27:46 iPhone WeChat[7309] : 《after》方法调用deep: [target:<TenpayPasswordCtrl: 0x17d3da20; baseClass = UITextField; frame = (0 0; 246 42); text = ''; clipsToBounds = YES; opaque = NO; layer = <CALayer: 0x17d3eb30>> 《selector》: initWithFrame:{{0, 0}, {246, 42}} AndImage:<UIImage: 0x17d3d810> ] 返回值:<TenpayPasswordCtrl: 0x17d3da20; baseClass = UITextField; frame = (0 0; 246 42); text = ''; clipsToBounds = YES; opaque = NO; layer = <CALayer: 0x17d3eb30>> interval:0.005786

Meow