iOS源码安全

话不多说直接上代码，欢迎共同探讨！

+ (BOOL)swizzle:(SEL)original with:(IMP)replacement store:(IMPPointer)store {

return class_swizzleMethodAndStore(self, original, replacement, store);

}

BOOL class_swizzleMethodAndStore(Class class, SEL original, IMP replacement, IMPPointer store) {

IMP imp = NULL;

Method method = class_getInstanceMethod(class, original);

if (method) {

const char *type = method_getTypeEncoding(method);

imp = class_replaceMethod(class, original, replacement, type);

if (!imp) {

imp = method_getImplementation(method);

}

}

if (imp && store) { *store = imp; }

return (imp != NULL);

}

程序入口

+(void)load{

static dispatch_once_t onceToken;

dispatch_once(&onceToken, ^{

[self swizzle:@selector(viewWillAppear:) with:(IMP)xxx_viewWillAppear store:(IMP *)&Setxxx_viewWillAppearIMP];

});

}

static void xxx_viewWillAppear(id self,SEL _cmd,BOOL animated);

static void (*Setxxx_viewWillAppearIMP)(id self, SEL _cmd, BOOL animated);

static void xxx_viewWillAppear(id self, SEL _cmd, BOOL animated) {

Setxxx_viewWillAppearIMP(self, _cmd, animated);

NSLog(@"viewWillAppear = %s",__func__);

}