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iOS 开发实用技术导航 NSHipster 中文版 http://nshipster.cn/ cocos2d 开源 2D 游戏引擎 http://www.cocos2d-iphone.org/ CocoaPods http://cocoapods.org/ Google Analytics for Mobile 统计解决方案 http://code.google.com/mobile/analytics/ WWDC https://developer.apple.com/wwdc/ Design Guides and Resources https://developer.apple.com/design/ Transcripts of WWDC sessions http://asciiwwdc.com Cocoa with Love http://cocoawithlove.com/ Cocoa Dev Central http://cocoadevcentral.com/ NSHipster http://nshipster.com/ Style Guides Google Objective-C Style Guide NYTimes Objective-C Style Guide Useful Tools and Services Charles Web Debugging Proxy Smore #Wrapper { background-image: url("/static/img/shadow_light.png"), url("//static.v2ex.com/tiles/idev.png"); background-repeat: repeat-x, repeat; } #Wrapper.Night { background-image: url("/static/img/shadow.png"), url("//cdn.v2ex.com/assets/bgs/idev_dark.png"); background-repeat: repeat-x, repeat; background-size: 20px 20px, 1648px 1165px; }
This topic created in 4724 days ago, the information mentioned may be changed or developed.
具体的做法是：会先把objectc的API勾出来，调用我们的写的函数，然后在去调用原来的API。
Supplement 1 May 20, 2013
抱歉，没描述清楚，如@thedevil5032 所说的:hook的方式来做。当系统调用一个函数的时候会先经过楼主他们写的，再由楼主他们写的代码去调用原生的。
 | 1 fly2never May 20, 2013 什么叫勾起来? |
 | 2 offspring May 20, 2013 表示看不懂... |
 | 4 thedevil5032 May 20, 2013 |
 | 5 alexrezit May 20, 2013 楼主是这个意思么? if ([oo respondsToSelector:@selector(xx:)] { ... } |
 | 6 anerevol May 21, 2013 楼主是想问为什么会crash？ 你要是用的mobileSubstrate hook的话，如果该类没有这个方法也不会crash的, 只是不会调用而已。 觉得crash跟hook本身没关系的，是其他地方的问题吧 |
| 9 alexrezit May 21, 2013 |
 | 10 kshatriya May 21, 2013 method swizzle是方法混合器, 通过SEL查IMP, 然后把IMP搅在一起 |
| 11 kshatriya May 21, 2013 void Swizzle(Class c, SEL orig, SEL new) { Method origMethod = class_getInstanceMethod(c, orig); Method newMethod = class_getInstanceMethod(c, new); if(class_addMethod(c, orig, method_getImplementation(newMethod), method_getTypeEncoding(newMethod))) class_replaceMethod(c, new, method_getImplementation(origMethod), method_getTypeEncoding(origMethod)); else method_exchangeImplementations(origMethod, newMethod); } |
| 12 kshatriya May 21, 2013 强烈要求v2ex可以有代码格式化+高亮语法 |
 | 13 loading May 21, 2013 挂钩都是作恶的开始吧… |
| 14 kshatriya May 21, 2013 crash普通情况下都是发送了空消息导致, 发之前做检查吧 hook一般都是先把orig函数的指针存一份, 然后覆盖, 在返回的时候返回给之前保存的orig函数指针, 只处理入参!别做多余的操作! 好混乱, 语死早啊 |
 | 15 wezzard May 21, 2013 method swizzling 不能上架？ |
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