5c21080203
1. 重构iOS原生对焦插件，支持按摄像头名称精准匹配设备 2. 优化摄像头选择逻辑，优先选用后置主摄并排除长焦/超广角镜头 3. 修复连续自动对焦失效问题，增加延迟初始化和定期校验 4. 添加调试日志便于排查摄像头相关问题
104 lines
4.2 KiB
Plaintext
104 lines
4.2 KiB
Plaintext
#import <AVFoundation/AVFoundation.h>
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#import <UIKit/UIKit.h>
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/// 通过名称查找摄像头设备
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static AVCaptureDevice *FindCameraByName(const char *cameraName)
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{
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if (cameraName == NULL || strlen(cameraName) == 0) {
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return [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
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}
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NSString *name = [NSString stringWithUTF8String:cameraName];
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// iOS 10+ DiscoverySession
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if (@available(iOS 10.0, *)) {
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AVCaptureDeviceDiscoverySession *session = [AVCaptureDeviceDiscoverySession
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discoverySessionWithDeviceTypes:@[AVCaptureDeviceTypeBuiltInWideAngleCamera,
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AVCaptureDeviceTypeBuiltInTelephotoCamera,
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AVCaptureDeviceTypeBuiltInUltraWideCamera]
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mediaType:AVMediaTypeVideo
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position:AVCaptureDevicePositionUnspecified];
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for (AVCaptureDevice *device in session.devices) {
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if ([device.localizedName containsString:name] ||
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[device.modelID containsString:name]) {
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return device;
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}
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}
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// 没找到精确匹配，返回第一个活跃的
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for (AVCaptureDevice *device in session.devices) {
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if (device.isConnected && !device.isSuspended) {
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return device;
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}
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}
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}
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return [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
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}
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extern "C" {
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/// 启用连续自动对焦和自动曝光（传入 C# 选中的摄像头名称）
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void _EnableContinuousAutoFocus(const char *cameraName)
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{
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dispatch_async(dispatch_get_main_queue(), ^{
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AVCaptureDevice *device = FindCameraByName(cameraName);
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if (!device) {
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NSLog(@"[CameraFocusHelper] 未找到摄像头设备");
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return;
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}
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NSLog(@"[CameraFocusHelper] 配置设备: %@ (name=%@, model=%@)",
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device.localizedName, device.localizedName, device.modelID);
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NSError *error = nil;
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if ([device lockForConfiguration:&error]) {
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// 连续自动对焦
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if ([device isFocusModeSupported:AVCaptureFocusModeContinuousAutoFocus]) {
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device.focusMode = AVCaptureFocusModeContinuousAutoFocus;
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NSLog(@"[CameraFocusHelper] 已设为连续自动对焦");
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} else {
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NSLog(@"[CameraFocusHelper] 设备不支持连续自动对焦");
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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
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if ([device respondsToSelector:@selector(isAutoFocusRangeRestrictionSupported)] &&
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[device isAutoFocusRangeRestrictionSupported]) {
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device.autoFocusRangeRestriction = AVCaptureAutoFocusRangeRestrictionNear;
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NSLog(@"[CameraFocusHelper] 已设对焦范围为近距");
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}
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[device unlockForConfiguration];
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NSLog(@"[CameraFocusHelper] 摄像头配置完成");
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} else {
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NSLog(@"[CameraFocusHelper] lockForConfiguration 失败: %@", error.localizedDescription);
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}
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});
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}
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/// 确保连续自动对焦仍在生效（传入 C# 选中的摄像头名称）
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void _EnsureContinuousAutoFocus(const char *cameraName)
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{
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dispatch_async(dispatch_get_main_queue(), ^{
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AVCaptureDevice *device = FindCameraByName(cameraName);
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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.focusMode != AVCaptureFocusModeContinuousAutoFocus &&
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[device isFocusModeSupported:AVCaptureFocusModeContinuousAutoFocus]) {
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device.focusMode = AVCaptureFocusModeContinuousAutoFocus;
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NSLog(@"[CameraFocusHelper] 重新设回连续自动对焦");
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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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