65 lines
2.4 KiB
Plaintext
65 lines
2.4 KiB
Plaintext
#import <AVFoundation/AVFoundation.h>
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#import <UIKit/UIKit.h>
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extern "C" {
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/// 启用连续自动对焦和自动曝光
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void _EnableContinuousAutoFocus()
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{
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dispatch_async(dispatch_get_main_queue(), ^{
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AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
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if (!device) return;
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NSError *error = nil;
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// 锁定设备开始配置
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if ([device lockForConfiguration:&error]) {
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// 连续自动对焦模式（持续调整，适合扫描二维码）
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if ([device isFocusModeSupported:AVCaptureFocusModeContinuousAutoFocus]) {
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device.focusMode = AVCaptureFocusModeContinuousAutoFocus;
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}
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// 连续自动曝光
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if ([device isExposureModeSupported:AVCaptureExposureModeContinuousAutoExposure]) {
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device.exposureMode = AVCaptureExposureModeContinuousAutoExposure;
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}
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// 对焦范围限制为近距（适合二维码）
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if ([device respondsToSelector:@selector(setAutoFocusRangeRestriction:)]) {
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if ([device isAutoFocusRangeRestrictionSupported]) {
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device.autoFocusRangeRestriction = AVCaptureAutoFocusRangeRestrictionNear;
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}
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}
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[device unlockForConfiguration];
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NSLog(@"[CameraFocusHelper] 已启用连续自动对焦");
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} else {
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NSLog(@"[CameraFocusHelper] 锁定设备失败: %@", error.localizedDescription);
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}
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});
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}
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/// 触发一次自动对焦（用于手动点按时调用）
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void _TriggerAutoFocus()
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{
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dispatch_async(dispatch_get_main_queue(), ^{
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AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
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if (!device) return;
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NSError *error = nil;
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if ([device lockForConfiguration:&error]) {
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if ([device isFocusModeSupported:AVCaptureFocusModeAutoFocus]) {
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device.focusMode = AVCaptureFocusModeAutoFocus;
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}
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if ([device isExposureModeSupported:AVCaptureExposureModeAutoExpose]) {
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device.exposureMode = AVCaptureExposureModeAutoExpose;
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}
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[device unlockForConfiguration];
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}
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});
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}
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}
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