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TUIKit/TUIChat/CommonUI/Camera/TUICaptureTimer.m

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+
+//  Created by Tencent on 2023/06/09.
+//  Copyright © 2023 Tencent. All rights reserved.
+
+#import "TUICaptureTimer.h"
+
+@interface TUICaptureTimer ()
+@property(nonatomic, strong) dispatch_source_t gcdTimer;
+@property(nonatomic, assign) CGFloat captureDuration;
+@end
+
+@implementation TUICaptureTimer
+
+- (instancetype)init {
+    self = [super init];
+    if (self) {
+        self.maxCaptureTime = 15.0f;
+    }
+    return self;
+}
+
+- (void)startTimer {
+    self.gcdTimer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, dispatch_get_global_queue(0, 0));
+
+    NSTimeInterval delayTime = 0.f;
+    NSTimeInterval timeInterval = 0.1f;
+    dispatch_time_t startDelayTime = dispatch_time(DISPATCH_TIME_NOW, (uint64_t)(delayTime * NSEC_PER_SEC));
+    dispatch_source_set_timer(self.gcdTimer, startDelayTime, timeInterval * NSEC_PER_SEC, timeInterval * NSEC_PER_SEC);
+
+    dispatch_source_set_event_handler(self.gcdTimer, ^{
+      self.captureDuration += timeInterval;
+      /**
+       * Updating UI on the main thread
+       */
+      dispatch_async(dispatch_get_main_queue(), ^{
+        if (self.progressBlock) {
+            self.progressBlock(self.captureDuration / self.maxCaptureTime, self.captureDuration);
+        }
+      });
+
+      /**
+       * Fnish
+       */
+      if (self.captureDuration >= self.maxCaptureTime) {
+          /**
+           * Invalid timer
+           */
+          CGFloat ratio = self.captureDuration / self.maxCaptureTime;
+          CGFloat recordTime = self.captureDuration;
+          [self cancel];
+          dispatch_async(dispatch_get_main_queue(), ^{
+            if (self.progressFinishBlock) self.progressFinishBlock(ratio, recordTime);
+          });
+      }
+    });
+    /**
+     * Start the task. After the GCD timer is created, it needs to be started manually
+     */
+    dispatch_resume(self.gcdTimer);
+}
+
+- (void)stopTimer {
+    [self cancel];
+    dispatch_async(dispatch_get_main_queue(), ^{
+      if (self.progressCancelBlock) self.progressCancelBlock();
+    });
+}
+
+- (void)cancel {
+    if (self.gcdTimer) {
+        dispatch_source_cancel(self.gcdTimer);
+        self.gcdTimer = nil;
+    }
+    self.captureDuration = 0;
+}
+
+@end