Logos语法

http://iphonedevwiki.net/index.php/Logos

• 1、新建Logos测试工程

001-LogosDemo工程.png

001-LogosDemo Screen Shot.png

• 2、用class-dump导出头文件

$class-dump -H 001-LogosDemo -o /Users/yaoqi/Desktop/LogosHeaders

class-dump 001-LogosDemo工程.png

• 3、新建Monkey工程，将Logos测试工程重签名

Monkey工程，重签名001-LogosDemo工程.png

此时Monkey工程已经将libsubstrate.dylib库和RevealServer.framework库注入进去了，有了libsubstrate.dylib库就能写Logos语法了。

002-loginHookDemo工程Framework文件夹.png

• 4、在Monkey中的Logos文件夹的.xm文件写Logos语法

屏幕快照 2018-05-15 下午9.37.41.png

_02_loginHookDemoDylib.xm

// See http://iphonedevwiki.net/index.php/Logos

#import <UIKit/UIKit.h>

@interface ViewController: UIViewController

- (void)presentViewController:(UIViewController *)viewControllerToPresent animated: (BOOL)flag completion:(void (^ __nullable)(void))completion NS_AVAILABLE_IOS(5_0);
+ (void)CL_classMethod;

@end

%hook ViewController

- (void)loginBtnClicked:(id)arg1 {
    %log;
    UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@"Hook成功了！！！" message:nil preferredStyle:(UIAlertControllerStyleAlert)];
    [alertVC addAction:[UIAlertAction actionWithTitle:@"确定" style:(UIAlertActionStyleCancel) handler:nil]];
    [self presentViewController:alertVC animated:YES completion:nil];
}

%new
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [self.view endEditing:YES];
    [self.class CL_classMethod];
}

%new
+ (void)CL_classMethod {
    NSLog(@"这是一个类方法！！！");
}

%end

这里在ViewController中定义了一个方法presentViewController:animated:completion:，只是为了能编译通过，骗过Xcode编译器。

5、运行成功后，Monkey工程就能Hook到001-LogosDemo工程里面的loginBtnClicked:

Logos Hook Screen Shot.png

Monkey工程注入FLEX库

https://github.com/Flipboard/FLEX

• 1、在Monkey的Dylib动态库中注入FLEX库

在Monkey工程的根目录添加Podfile文件，Target为Monkey工程动态库的Target

# Uncomment the next line to define a global platform for your project
platform :ios, '9.0'

target '002-loginHookDemoDylib' do
  use_frameworks!
  pod 'FLEX'
end

• 2、界面展示

FLEX能查看App的文件、数据库、沙盒、界面层级。。。

Screen Shot 2018-05-15 at 下午10.53.49.png

Screen Shot 2018-05-15 at 下午10.56.05.png

Logos练习

需求：在微信首页导航栏左边添加一个➕按钮，点击事件和右边按钮的点击效果一样。

• 1、新建Monkey工程，重签名微信包，并将FLEX注入进动态库中

• 2、Xcode界面调试，class-dump微信包，找到首页界面NewMainFrameViewController控制器

屏幕快照 2018-05-15 下午11.22.50.png

3、Xcode界面调试，找到微信导航栏右边按钮的点击的showRightTopMenuBtn方法

Target <NewMainFrameRightTopMenuBtn: 0x104dd99d0>
Action showRightTopMenuBtn

屏幕快照 2018-05-15 下午11.34.13.png

屏幕快照 2018-05-15 下午11.36.50.png

• 4、在内存中查找导航栏右边按钮视图层次

屏幕快照 2018-05-15 下午11.53.03.png

5、写代码实现需求

#import <UIKit/UIKit.h>

@interface NewMainFrameViewController :UIViewController
@end

@interface NewMainFrameRightTopMenuBtn: UIView
- (void)showRightTopMenuBtn;
@end

@interface MMBarButtonItem: UIBarButtonItem
@property(nonatomic,weak)NewMainFrameRightTopMenuBtn *view;
@end

%hook NewMainFrameViewController

-(UINavigationItem *)navigationItem{
    //    NSLog(@"\n\n\n-------------navigationItem-----");
    //方法交换! 调用自己!
    return %orig;
}

- (void)viewDidAppear:(_Bool)arg1{
    %orig;
    UIButton * leftBtn = [UIButton buttonWithType:(UIButtonTypeContactAdd)];
    [leftBtn addTarget:self action:@selector(CL_leftClick) forControlEvents:(UIControlEventTouchUpInside)];
    [self.navigationItem setLeftBarButtonItem: [[UIBarButtonItem alloc] initWithCustomView:leftBtn]];
}

- (void)viewDidLoad{
    %orig;
    //    NSLog(@"\n\n\n-----viewDidLoad-----------");
}

%new
-(void)CL_leftClick
{
    /**
     从内存中能查到调用该方法：[self.navigationItem.rightBarButtonItem.view showRightTopMenuBtn]
     self：代表NewMainFrameViewController控制器

     */
    MMBarButtonItem *btn = self.navigationItem.rightBarButtonItem;
    [btn.view showRightTopMenuBtn];
}

%end

Screen Shot 2018-05-16 at 上午12.00.58.png