Question

有一种方法可以通过编程方式获取使用iphone拍摄的照片尺寸吗？我想直接获取尺寸而不通过模型版本，因此该解决方案无效：

检查模型版本 - ＆gt;写一个字典，其中包含每个iphone型号的尺寸 - ＆gt;采取正确的指数

Answer 1

当你拍照时，你会得到一个UIImage。

UIImage对象具有 - （CGSize）大小方法，该方法以点为单位返回图像的尺寸。你应该将它乘以它的scale属性来获得像素。

Source

ProTip：阅读文档。

Answer 2

尝试使用此代码获取最大相机分辨率：

- (CMVideoDimensions) getCameraMaxStillImageResolution:(AVCaptureDevicePosition) cameraPosition {

    CMVideoDimensions max_resolution;
    max_resolution.width = 0;
    max_resolution.height = 0;

    AVCaptureDevice *captureDevice = nil;

    NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
    for (AVCaptureDevice *device in devices) {
        if ([device position] == cameraPosition) {
            captureDevice = device;
            break;
        }
    }
    if (captureDevice == nil) {
        return max_resolution;
    }

    NSArray* availFormats=captureDevice.formats;

    for (AVCaptureDeviceFormat* format in availFormats) {
        CMVideoDimensions resolution = format.highResolutionStillImageDimensions;
        int w = resolution.width;
        int h = resolution.height;
        if ((w * h) > (max_resolution.width * max_resolution.height)) {
            max_resolution.width = w;
            max_resolution.height = h;
        }
    }

    return max_resolution;
}

- (void) printCamerasInfo {
    CMVideoDimensions res;
    res = [self getCameraMaxStillImageResolution:AVCaptureDevicePositionBack];
    NSLog(@" Back  Camera max Image resolution: %d x %d", res.width, res.height);
    res = [self getCameraMaxStillImageResolution:AVCaptureDevicePositionFront];
    NSLog(@" Front Camera max Image resolution: %d x %d", res.width, res.height);
}

Iphone以编程方式获得照片分辨率

2 个答案: