iOS SDK HOOK Appdelegate中的生命周期

最近在做自己的framework静态库，需要用到支付宝和微信支付，支付回调又是在Appdelegate中拿到 所以想找一种替代或者说捕获Appdelegate声明周期的方法，苦寻之后发现有大神处理过类似的事情，所以就尝试了一下，首先感谢大神的文章。
文章地址：(http://www.cnblogs.com/lonkiss/p/6492385.html)

在使用过程中也遇到一些问题，主要是hook的类根据使用方式不同导致的（其实找了很久原因），以下内容做记录使用：

主要是使用Runtime的

objc_getClass、
class_addMethod、
class_getMethodImplementation、
class_getInstanceMethod、
method_exchangeImplementations
等方法

1、SDK中创建继承自NSObject的XXX_HookObject文件

2、.m中实现方法

- (void)hookMehod:(SEL)oldSEL andDef:(SEL)defaultSEL andNew:(SEL)newSEL {
     NSLog(@"hookMehod");
    
     Class oldClass = objc_getClass([@"AppDelegate" UTF8String]);

     Class newClass = [CYX_HookUtils class];

     //把方法加给原Class
     class_addMethod(oldClass, newSEL, class_getMethodImplementation(newClass, newSEL), nil);
     class_addMethod(oldClass, oldSEL, class_getMethodImplementation(newClass, defaultSEL),nil);

     Method oldMethod = class_getInstanceMethod(oldClass, oldSEL);
     assert(oldMethod);
     Method newMethod = class_getInstanceMethod(oldClass, newSEL);
     assert(newMethod);
     method_exchangeImplementations(oldMethod, newMethod);
}

+ (void)load {
     NSLog(@"load");
     [self hookMehod:@selector(application:didFinishLaunchingWithOptions:) andDef:@selector(defaultApplication:didFinishLaunchingWithOptions:) andNew:@selector(hookedApplication:didFinishLaunchingWithOptions:)];

     [self hookMehod:@selector(applicationWillEnterForeground:) andDef:@selector(defaultApplicationWillEnterForeground:) andNew:@selector(hookedApplicationWillEnterForeground:)];
}

/*具体要走的代码*/
 -(BOOL)hookedApplication:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)dic
{
     NSLog(@"applicationDidFinishLaunching");
     [self hookedApplication:application didFinishLaunchingWithOptions:dic];
     return YES;
}

- (void)hookedApplicationWillResignActive:(UIApplication *)application {
    [self hookedApplicationWillResignActive:application];
}

- (void)hookedApplicationDidEnterBackground:(UIApplication *)application {
     [self hookedApplicationDidEnterBackground:application];
}

- (void)hookedApplicationWillEnterForeground:(UIApplication *)application {
     [self hookedApplicationWillEnterForeground:application];
}

- (void)hookedApplicationDidBecomeActive:(UIApplication *)application {
     [self hookedApplicationDidBecomeActive:application];
}

- (void)hookedApplicationWillTerminate:(UIApplication *)application {
    [self hookedApplicationWillTerminate:application];
}

原作者使用了Adobe框架，所以会出现无法找到要hook的类问题，如果仅是在SDK中Hook Appdelegate生命周期则直接将原文档中的

Class oldClass = objc_getClass([@"CTAppDelegate" UTF8String]);

更改获取Appdelegate类

Class oldClass = objc_getClass([@"AppDelegate" UTF8String]);

且无需在主动调用Appdelegate，讲hook文件直接放到SDK中即可使用（NSObject会自动调用类方法

+ (void)load

主要问题解决了，其他的就是如何继承支付宝和微信SDK问题了

再次感谢原作者
原出处(http://www.cnblogs.com/lonkiss/p/6492385.html)