iOS逆向小技能：使用substrate及runtime进行hook（定时检测app是否开启）

#import <Foundation/Foundation.h>
#import <objc/runtime.h>

@interface KNHook : NSObject



/**
 替换对象方法
 
 @param originalClass 原始类
 @param originalSelector 原始类的方法
 @param swizzledClass 替换类
 @param swizzledSelector 替换类的方法
 */
void kn_hookMethod(Class originalClass, SEL originalSelector, Class swizzledClass, SEL swizzledSelector);

/**
 替换类方法
 
 @param originalClass 原始类
 @param originalSelector 原始类的类方法
 @param swizzledClass 替换类
 @param swizzledSelector 替换类的类方法
 */
void kn_hookClassMethod(Class originalClass, SEL originalSelector, Class swizzledClass, SEL swizzledSelector);

/**
 替换对象方法
 
 @param originalClass 原始类
 @param originalSelector 原始类的方法
 @param swizzledClass 替换类
 @param swizzledSelector 替换类的方法
 */

void kn_hookMethod(Class originalClass, SEL originalSelector, Class swizzledClass, SEL swizzledSelector){
    
    Method originalMethod = class_getInstanceMethod(originalClass, originalSelector);
    Method swizzledMethod = class_getInstanceMethod(swizzledClass, swizzledSelector);
    if(originalMethod && swizzledMethod) {
        method_exchangeImplementations(originalMethod, swizzledMethod);
    }

    
}

/**
 替换类方法
 
 @param originalClass 原始类
 @param originalSelector 原始类的类方法
 @param swizzledClass 替换类
 @param swizzledSelector 替换类的类方法
 */


void kn_hookClassMethod(Class originalClass, SEL originalSelector, Class swizzledClass, SEL swizzledSelector){
    Method originalMethod = class_getClassMethod(originalClass, originalSelector);
    Method swizzledMethod = class_getClassMethod(swizzledClass, swizzledSelector);
    if(originalMethod && swizzledMethod) {
        method_exchangeImplementations(originalMethod, swizzledMethod);
    }

}

static void __attribute__((constructor)) initialize(void) {
    MSHookMessageEx(objc_getClass("MessageService"),  @selector(OnSyncBatchAddMsgs:isFirstSync:), (IMP)&new_MessageService_OnSyncBatchAddMsgs_isFirstSync, (IMP*)&origin_new_MessageService_OnSyncBatchAddMsgs_isFirstSync);
    
    [NSObject hookWeChat];
}

#import "NSObject+WeChatHook.h"

@implementation NSObject (WeChatHook)


+ (void)hookWeChat {    
    
    kn_hookClassMethod(objc_getClass("CUtility"), @selector(HasWechatInstance), [self class], @selector(hook_HasWechatInstance));   
}
#pragma mark - hook 方法
/**
 hook 是否已启动
 */
+ (BOOL)hook_HasWechatInstance {
    NSLog(@"kn hook_HasWechatInstance");
    return NO;
}
@end

NSTimer *timer ;

%hook SpringBoard
//applicationDidFinishLaunching
-(void)applicationDidFinishLaunching: (id)application
{
        %orig;
 timer = [NSTimer scheduledTimerWithTimeInterval:60*2 target:self selector:@selector(checkHeart) userInfo:nil repeats:YES];
}

%new
- (void)checkHeart
{
 //定时检测微信是否开启
    [[UIApplication sharedApplication] launchApplicationWithIdentifier:@"com.tencent.xin" suspended:0];
}

%end

//qutolock
%hook SBLockScreenViewController
-(void)activate{

 %orig;

 [[%c(SBLockScreenManager) sharedInstance] unlockUIFromSource:0 withOptions:nil];
}
%end

static void (*origin_new_MessageService_OnSyncBatchAddMsgs_isFirstSync)(MessageService*,SEL,NSArray *,BOOL);
static void new_MessageService_OnSyncBatchAddMsgs_isFirstSync(MessageService* self,SEL _cmd,NSArray * msgs,BOOL isFirstSync){
    origin_new_MessageService_OnSyncBatchAddMsgs_isFirstSync(self,_cmd,msgs,isFirstSync);
}