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https://github.com/qhd/ANYMethodLog
Log any method call of object in Objective-C
https://github.com/qhd/ANYMethodLog
aspects class-addmethod class-copymethodlist class-loader class-replacemethod classification hacking hacking-tool hook imp ios log log-any-method method methodswizzling objective-c runtime
Last synced: about 1 month ago
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Log any method call of object in Objective-C
- Host: GitHub
- URL: https://github.com/qhd/ANYMethodLog
- Owner: qhd
- License: mit
- Created: 2017-01-18T08:06:30.000Z (almost 8 years ago)
- Default Branch: master
- Last Pushed: 2022-07-31T16:46:14.000Z (over 2 years ago)
- Last Synced: 2024-08-03T18:20:01.441Z (4 months ago)
- Topics: aspects, class-addmethod, class-copymethodlist, class-loader, class-replacemethod, classification, hacking, hacking-tool, hook, imp, ios, log, log-any-method, method, methodswizzling, objective-c, runtime
- Language: Objective-C
- Homepage:
- Size: 632 KB
- Stars: 423
- Watchers: 13
- Forks: 104
- Open Issues: 6
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- Awesome-iOS - ANYMethodLog - Log any method call of object in Objective-C 打印 Objective-C 对象中的任何方法 (Tools)
README
# ANYMethodLog - log any method call of object in Objective-C
[English](../master/readme-en.md)
打印 Objective-C 对象中的任何方法
## 调用说明:
```objective-c
+ (void)logMethodWithClass:(Class)aClass
condition:(BOOL(^)(SEL sel)) condition
before:(void(^)(id target, SEL sel, NSArray *args, int deep)) before
after:(void(^)(id target, SEL sel, NSArray *args, NSTimeInterval interval, int deep, id retValue)) after;
```
aClass：要打印的类
condition：根据此 block 来决定是否追踪方法（sel 是方法名）
before：方法调用前会调用该 block（target 是检测的对象，sel 是方法名，args 是参数列表，deep 是调用层级）
after：方法调用后会调用该 block（interval 是执行方法的耗时，retValue 是返回值）
## 功能：
1.打印一个类定义的所有方法，包括公开方法和私有方法：
```objective-c
[ANYMethodLog logMethodWithClass:[UIViewController class] condition:^BOOL(SEL sel) {
NSLog(@"method:%@", NSStringFromSelector(sel));
return NO;
} before:nil after:nil];
```
2.打印在运行过程中调用了哪些方法：
```objective-c
[ANYMethodLog logMethodWithClass:[UIViewController class] condition:^BOOL(SEL sel) {
return YES;
} before:^(id target, SEL sel, NSArray *args, int deep) {
NSLog(@"target:%@ sel:%@", target, NSStringFromSelector(sel));
} after:nil];
```
3.打印特定几个方法的调用顺序：
```objective-c
[ANYMethodLog logMethodWithClass:[UIViewController class] condition:^BOOL(SEL sel) {
NSArray *whiteList = @[@"loadView", @"viewWillAppear:", @"viewDidAppear:", @"viewWillDisappear:", @"viewDidDisappear:", @"viewWillLayoutSubviews", @"viewDidLayoutSubviews"];
return [whiteList containsObject:NSStringFromSelector(sel)];
} before:^(id target, SEL sel, NSArray *args, int deep) {
NSLog(@"target:%@ sel:%@", target, NSStringFromSelector(sel));
} after:nil];
```
4.打印调用方法时的参数值：
```objective-c
[ANYMethodLog logMethodWithClass:NSClassFromString(@"UIViewController") condition:^BOOL(SEL sel) {
return [NSStringFromSelector(sel) isEqualToString:@"viewWillAppear:"];
} before:^(id target, SEL sel, NSArray *args, int deep) {
NSLog(@"before target:%@ sel:%@ args:%@", target, NSStringFromSelector(sel), args);
} after:nil];
```
5.打印某个方法调用前后的变化：
```objective-c
[ANYMethodLog logMethodWithClass:NSClassFromString(@"ListController") condition:^BOOL(SEL sel) {
return [NSStringFromSelector(sel) isEqualToString:@"changeBackground"];
} before:^(id target, SEL sel, NSArray *args, int deep) {
NSLog(@"before background color:%@", [(ListController *)target view].backgroundColor);
} after:^(id target, SEL sel, NSArray *args, NSTimeInterval interval, int deep, id retValue) {
NSLog(@"after background color:%@", [(ListController *)target view].backgroundColor);
}];
```
6.打印某个方法调用的耗时：
```objective-c
[ANYMethodLog logMethodWithClass:NSClassFromString(@"ListController") condition:^BOOL(SEL sel) {
return [NSStringFromSelector(sel) isEqualToString:@"changeBackground"];
} before:^(id target, SEL sel, NSArray *args, int deep) {
} after:^(id target, SEL sel, NSArray *args, NSTimeInterval interval, int deep, id retValue) {
NSLog(@"interval::%@", [@(interval) stringValue]);
}];
```
7.追踪方法调用顺序：
```objective-c
[ANYMethodLog logMethodWithClass:NSClassFromString(@"ListController") condition:^BOOL(SEL sel) {
return YES;
} before:^(id target, SEL sel, NSArray *args, int deep) {
NSString *selector = NSStringFromSelector(sel);
NSArray *selectorArrary = [selector componentsSeparatedByString:@":"];
selectorArrary = [selectorArrary filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"length > 0"]];
NSMutableString *selectorString = [NSMutableString new];
for (int i = 0; i < selectorArrary.count; i++) {
[selectorString appendFormat:@"%@:%@ ", selectorArrary[i], args[i]];
}
NSMutableString *deepString = [NSMutableString new];
for (int i = 0; i < deep; i++) {
[deepString appendString:@"-"];
}
NSLog(@"%@[%@ %@]", deepString , target, selectorString);
} after:^(id target, SEL sel, NSArray *args, NSTimeInterval interval, int deep, id retValue) {
NSMutableString *deepString = [NSMutableString new];
for (int i = 0; i < deep; i++) {
[deepString appendString:@"-"];
}
NSLog(@"%@ret:%@", deepString, retValue);
}];
```
## TODO：
+ 解决真机上运行出现的问题。 (已完成)
+ 打印调用时的参数值。 (已完成)
+ 打印返回值。 (已完成)
+ 计算某个方法的耗时。 (已完成)
## 原理：
利用runtime交换方法的实现。动态创建新方法，在新方法里再调用原来的方法。现阶段还不是很完美地调用原来方法，在需要传参的方法会出现传参失败，在真机问题较多，在模拟器问题较少，在用的时候可以过滤掉需要传参的方法。
1.把原方法的 `IMP` 换成 `_objc_msgForward` ，使之触发 `forwardInvocation` 方法；
2.把方法 `forwardInvocation` 的 `IMP` 换成 `qhd_forwardInvocation` ；
3.创建一个新方法，`IMP` 就是原方法的原来的 `IMP`，那么只要在 `qhd_forwardInvocation` 调用新方法即可。那么就可以在 `qhd_forwardInvocation` 插入 log 。
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