添加了对KVC崩溃的Hook #53
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| Original file line number | Diff line number | Diff line change |
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| // | ||
| // JJPerson.h | ||
| // JJException | ||
| // | ||
| // Created by 无头骑士 GJ on 2019/1/30. | ||
| // Copyright © 2019 Jezz. All rights reserved. | ||
| // | ||
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| #import <Foundation/Foundation.h> | ||
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| NS_ASSUME_NONNULL_BEGIN | ||
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| @interface JJPerson : NSObject | ||
| { | ||
| int age; | ||
| } | ||
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| @property (nonatomic, strong) NSString *name; | ||
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| @end | ||
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| NS_ASSUME_NONNULL_END |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| // | ||
| // JJPerson.m | ||
| // JJException | ||
| // | ||
| // Created by 无头骑士 GJ on 2019/1/30. | ||
| // Copyright © 2019 Jezz. All rights reserved. | ||
| // | ||
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| #import "JJPerson.h" | ||
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| @implementation JJPerson | ||
| + (BOOL)accessInstanceVariablesDirectly | ||
| { | ||
| return YES; | ||
| } | ||
| @end | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| // | ||
| // NSObject+KVCCrash.h | ||
| // JJException | ||
| // | ||
| // Created by 无头骑士 GJ on 2019/1/30. | ||
| // Copyright © 2019 Jezz. All rights reserved. | ||
| // | ||
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| #import <Foundation/Foundation.h> | ||
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| NS_ASSUME_NONNULL_BEGIN | ||
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| @interface NSObject (KVCCrash) | ||
| + (void)jj_swizzleKVCCrash; | ||
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| @end | ||
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| NS_ASSUME_NONNULL_END | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| // | ||
| // NSObject+KVCCrash.m | ||
| // JJException | ||
| // | ||
| // Created by 无头骑士 GJ on 2019/1/30. | ||
| // Copyright © 2019 Jezz. All rights reserved. | ||
| // | ||
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| #import "NSObject+KVCCrash.h" | ||
| #import "NSObject+SwizzleHook.h" | ||
| #import "JJExceptionProxy.h" | ||
| #import <objc/message.h> | ||
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| @implementation NSObject (KVCCrash) | ||
| + (void)jj_swizzleKVCCrash | ||
| { | ||
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| swizzleInstanceMethod([self class], @selector(setValue:forKey:), @selector(hookSetValue:forKey:)); | ||
| } | ||
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| - (void)hookSetValue:(id)value forKey:(NSString *)key | ||
| { | ||
| if (key.length == 0) return; | ||
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There was a problem hiding this comment. if (key.length == 0) { |
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| NSString *methodSuffix = [NSString stringWithFormat: @"%@%@", [[key substringToIndex: 1] uppercaseString], [key substringFromIndex: 1]]; | ||
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| // 1、判断setKey方法是否存在 | ||
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| SEL setXXSelector = NSSelectorFromString([NSString stringWithFormat: @"set%@", methodSuffix]); | ||
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| Method setXXMethod = class_getInstanceMethod([self class], setXXSelector); | ||
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| if (setXXMethod) | ||
| { | ||
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| [self hookSetValue: value forKey: key]; | ||
| return; | ||
| } | ||
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| // 2、判断_setKey方法是否存在 | ||
| SEL _setXXSelector = NSSelectorFromString([NSString stringWithFormat: @"_set%@", methodSuffix]); | ||
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| Method _setXXMethod = class_getInstanceMethod([self class], _setXXSelector); | ||
| if (_setXXMethod) | ||
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| { | ||
| [self hookSetValue: value forKey: key]; | ||
| return; | ||
| } | ||
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| // 3、accessInstanceVariablesDirectly的返回值，如果为NO，直接抛出异常 | ||
| SEL accessInstanceVariablesDirectlySEL = @selector(accessInstanceVariablesDirectly); | ||
| NSMethodSignature *methodSignature = [NSMethodSignature methodSignatureForSelector: accessInstanceVariablesDirectlySEL]; | ||
| NSInvocation *invocation = [NSInvocation invocationWithMethodSignature: methodSignature]; | ||
| [invocation setSelector: accessInstanceVariablesDirectlySEL]; | ||
| [invocation invokeWithTarget: [self class]]; | ||
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| BOOL result; | ||
| [invocation getReturnValue: &result]; | ||
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| // 异常处理 | ||
| if (result == NO) | ||
|
There was a problem hiding this comment. 布尔类型不需要==，直接if (result)这种就行，还有括号问题 |
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| { | ||
| handleCrashException(JJExceptionGuardKVCCrash, @"hookSetValue:forKey: key is not exist"); | ||
| return; | ||
| } | ||
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| // 4、检查是否存在 _key、_isKey、key, isKey任一属性是否包含在成员变量中 | ||
| NSMutableArray *keys = [NSMutableArray array]; | ||
| [keys addObject: [NSString stringWithFormat: @"_%@", key]]; | ||
| [keys addObject: [NSString stringWithFormat: @"_is%@", methodSuffix]]; | ||
| [keys addObject: [NSString stringWithFormat: @"%@", key]]; | ||
| [keys addObject: [NSString stringWithFormat: @"is%@", methodSuffix]]; | ||
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| unsigned int count = 0; | ||
| Ivar *members = class_copyIvarList([self class], &count); | ||
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| __block BOOL find = NO; | ||
| for (int i = 0; i < count; i++) | ||
| { | ||
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| Ivar var = members[i]; | ||
| NSString *memeberName = [[NSString alloc] initWithUTF8String: ivar_getName(var)]; | ||
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| if (![[memeberName lowercaseString] containsString: key]) continue; | ||
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| [keys enumerateObjectsUsingBlock:^(NSString * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) { | ||
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| if ([obj isEqualToString: memeberName]) | ||
| { | ||
| find = YES; | ||
| [self hookSetValue: value forKey: key]; | ||
| *stop = YES; | ||
| } | ||
| }]; | ||
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| if (find) break; | ||
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| } | ||
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| if (find == NO) | ||
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| handleCrashException(JJExceptionGuardKVCCrash, @"hookSetValue:forKey: key is not exist"); | ||
| } | ||
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| @end | ||
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函数上下各空一行，大括号紧跟在函数名且空一个空格