KYHooker
KYHooker allows you adds block of code before/replace/after the selector,and you can manage the block with the identifer,remove or override the code you adds.
KYHooker extends NSObject with the following methods:
/**
Adds a block of code before/replace/after the selector for a specific class with an identifer.
You can remove or override the block of code for a specific hook with the identifer.
@param isInstanceMethod the selector you want to hook is instance method or not
@param block the code you wan to adds,block will return an invocation ,you can get the original method params from invocation
- (void)getArgument:(void *)argumentLocation atIndex:(NSInteger)idx;
@note the first argument of the invocation is the object which calling the method,and the second argument is _cmd
@return Hook success or not
*/
+ (BOOL)ky_hookSelector:(SEL)selector
isInstanceMethod:(BOOL)isInstanceMethod
position:(KYHookPosition)position
identifier:(NSString *)identifier
withBlock:(void(^ _Nullable )(NSInvocation *invocation))block;
/**
Remove the block of code which added before/replace/after the selector for a specific class with an identifer.
@param isInstanceMethod the selector you want to hook is instance method or not
*/
+ (void)ky_removeHookForSelector:(SEL)selector
isInstanceMethod:(BOOL)isInstanceMethod
identifier:(NSString *)identifier;Examples: here is the method we hooked:
+ (void)logMessage:(NSString *)message {
NSLog(@"%@",message);
}hook the method:
[ViewController ky_hookSelector:@selector(logMessage:) isInstanceMethod:NO position:KYHookPositionAfter identifier:@"1" withBlock:^(NSInvocation *invocation){
NSLog(@"I");
}];
[ViewController ky_hookSelector:@selector(logMessage:) isInstanceMethod:NO position:KYHookPositionAfter identifier:@"2" withBlock:^(NSInvocation *invocation){
NSLog(@"Love");
}];
[ViewController ky_hookSelector:@selector(logMessage:) isInstanceMethod:NO position:KYHookPositionAfter identifier:@"3" withBlock:^(NSInvocation *invocation) {
NSLog(@"Coding");
}];
[ViewController logMessage:@"hello world"];the logs:
hello world
I
Love
Codingyou can override the block you adds by adding:
[ViewController ky_hookSelector:@selector(logMessage:) isInstanceMethod:NO position:KYHookPositionAfter identifier:@"3" withBlock:^(NSInvocation *invocation) {
NSLog(@"Girls");
}];the logs:
hello world
I
Love
Girlsand you can remove the block you adds by adding:
[ViewController ky_removeHookForSelector:@selector(logMessage:) isInstanceMethod:NO identifier:@"1"];the logs:
hello world
Love
Girls