Iphone以编程方式获取照片分辨率

Question

有一种方法可以通过程序获得用iPhone拍摄的照片的尺寸？我想直接把尺寸，而不经过throught模型版本，因此该方案不能有效：

检查模型版本 - >写与每部iPhone模型的维度字典 - >采取正确的索引

Answer 1

当你拍照时，你会得到一个UIImage。

UIImage对象有一个 - （CGSize）大小的方法，它返回图像的点的尺寸。你应该乘以它的scale属性来获取像素。

Source

普罗蒂普：阅读文档。

Answer 2

尝试为获得最大的分辨率的相机这段代码：

- (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); 
}