支持系统时间校正

1. 提供接口校正用户修改系统时间作弊
2. MTRule 部分属性改为只读，减少线程安全风险

MTDemo/MTDemoTests/MTDemoTests.m

@@ -289,10 +289,9 @@ - (void)testApplyRuleTwice {
 
 - (void)testPerformanceExample {
     // This is an example of a performance test case.
-    MTRule *rule = [self.stub mt_limitSelector:@selector(foo:) oncePerDuration:0.01 usingMode:MTPerformModeDebounce];
-    rule.alwaysInvokeBlock =  ^(MTRule *rule, NSDate *date) {
+    [self.stub mt_limitSelector:@selector(foo:) oncePerDuration:0.01 usingMode:MTPerformModeDebounce onMessageQueue:nil alwaysInvokeBlock:^(MTRule *rule, NSDate *date) {
         return YES;
-    };
+    }];
     NSDate *date = [NSDate date];
     [self measureBlock:^{
         // Put the code you want to measure the time of here.

MessageThrottle.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
 s.name         = "MessageThrottle"
-s.version      = "1.3.6"
+s.version      = "1.3.7"
 s.summary      = "A lightweight Objective-C message throttle and debounce library."
 s.description  = <<-DESC
 MessageThrottle is a lightweight, simple library for controlling frequency of forwarding Objective-C messages. You can choose to control existing methods per instance or per class. It's an implementation of function throttle/debounce developed with Objective-C runtime. 

MessageThrottle/MessageThrottle.h

@@ -61,12 +61,12 @@ Class mt_metaClass(Class cls);
  block 传入的第一个参数为 `self`，其余参数列表与消息调用的参数列表相同。
  block 如果返回 YES，则消息立即执行，但不会影响当前节流模式。
  */
-@property (nonatomic) id alwaysInvokeBlock;
+@property (nonatomic, readonly) id alwaysInvokeBlock;
 
 /**
  MTModePerformLastly 和 MTModePerformDebounce 模式下消息发送的队列，默认在主队列
  */
-@property (nonatomic) dispatch_queue_t messageQueue;
+@property (nonatomic, readonly) dispatch_queue_t messageQueue;
 
 /**
  是否持久化规则。如果选择持久化，下次启动 App 将会自动应用规则；默认为 NO，规则只在内存中生效。
@@ -102,8 +102,18 @@ Class mt_metaClass(Class cls);
 @interface MTEngine : NSObject
 
 @property (nonatomic, class, readonly) MTEngine *defaultEngine;
+
+/**
+ 获取所有规则
+ */
 @property (nonatomic, readonly) NSArray<MTRule *> *allRules;
 
+/**
+ 校正系统时间所需的差值。用户可能手动修改系统时间，此时可以计算服务器时间与系统时间的差值进行修正。
+ 单位：秒
+ */
+@property (nonatomic) NSTimeInterval correctionForSystemTime;
+
 /**
  应用规则，会覆盖已有的规则
 
@@ -166,7 +176,7 @@ Class mt_metaClass(Class cls);
  @param messageQueue 延时执行方法的队列
  @return 如果限频成功则返回规则对象，否则返回 nil
  */
-- (nullable MTRule *)mt_limitSelector:(SEL)selector oncePerDuration:(NSTimeInterval)durationThreshold usingMode:(MTPerformMode)mode onMessageQueue:(dispatch_queue_t)messageQueue;
+- (nullable MTRule *)mt_limitSelector:(SEL)selector oncePerDuration:(NSTimeInterval)durationThreshold usingMode:(MTPerformMode)mode onMessageQueue:(nullable dispatch_queue_t)messageQueue;
 
 /**
  对方法调用限频，可以指定方法某种情况下一定会调用。
@@ -179,7 +189,7 @@ Class mt_metaClass(Class cls);
  @param alwaysInvokeBlock 是否必须执行消息。block 的参数列表可选，返回值为 BOOL 类型。参考 `MTRule`。
  @return 如果限频成功则返回规则对象，否则返回 nil
  */
-- (nullable MTRule *)mt_limitSelector:(SEL)selector oncePerDuration:(NSTimeInterval)durationThreshold usingMode:(MTPerformMode)mode onMessageQueue:(dispatch_queue_t)messageQueue alwaysInvokeBlock:(nullable id)alwaysInvokeBlock;
+- (nullable MTRule *)mt_limitSelector:(SEL)selector oncePerDuration:(NSTimeInterval)durationThreshold usingMode:(MTPerformMode)mode onMessageQueue:(nullable dispatch_queue_t)messageQueue alwaysInvokeBlock:(nullable id)alwaysInvokeBlock;
 
 @end
 

MessageThrottle/MessageThrottle.m

@@ -127,6 +127,8 @@ @interface MTRule () <NSSecureCoding>
 @property (nonatomic) NSInvocation *lastInvocation;
 @property (nonatomic) SEL aliasSelector;
 @property (nonatomic, readwrite, getter=isActive) BOOL active;
+@property (nonatomic, readwrite) id alwaysInvokeBlock;
+@property (nonatomic, readwrite) dispatch_queue_t messageQueue;
 
 @end
 
@@ -363,7 +365,6 @@ - (void)savePersistentRules
     return [rules copy];
 }
 
-
 /**
  添加 target-selector 记录
 
@@ -515,7 +516,7 @@ - (void)discardRule:(MTRule *)rule whenTargetDealloc:(MTDealloc *)mtDealloc
     pthread_mutex_unlock(&mutex);
 }
 
-#pragma mark - Private Helper
+#pragma mark - Private Helper Function
 
 static BOOL mt_checkRuleValid(MTRule *rule)
 {
@@ -600,6 +601,7 @@ static void mt_handleInvocation(NSInvocation *invocation, MTRule *rule)
     }
 
     NSTimeInterval now = [[NSDate date] timeIntervalSince1970];
+    now += MTEngine.defaultEngine.correctionForSystemTime;
 
     switch (rule.mode) {
         case MTPerformModeFirstly: {
@@ -937,7 +939,7 @@ - (nullable MTRule *)mt_limitSelector:(SEL)selector oncePerDuration:(NSTimeInter
     }
     rule.durationThreshold = durationThreshold;
     rule.mode = mode;
-    rule.messageQueue = messageQueue;
+    rule.messageQueue = messageQueue ?: dispatch_get_main_queue();
     rule.alwaysInvokeBlock = alwaysInvokeBlock;
     rule.persistent = (mode == MTPerformModeFirstly && durationThreshold > 5 && mt_object_isClass(self));
     if (isNewRule) {

README.md

@@ -62,13 +62,6 @@ Stub *s = [Stub new];
 // You can also assign `Stub.class` or `mt_metaClass(Stub.class)` to `target` argument.
 MTRule *rule = [[MTRule alloc] initWithTarget:s selector:@selector(foo:) durationThreshold:0.01];
 rule.mode = MTModePerformLast; // Or `MTModePerformFirstly`, ect
-rule.messageQueue = /** a dispatch queue you want, maybe `dispatch_get_main_queue()` whatever...*/
-rule.alwaysInvokeBlock = ^(MTRule *rule, NSDate *date) {
-   if ([date isEqualToDate:[NSDate dateWithTimeIntervalSince1970:0]]) {
-       return YES;
-   }
-   return NO;
-};
 [rule apply];
 ```