使用UIImagePickerController拍摄图像

我使用UIImagePickerController类从iPhone相机拍摄照片。使用UIImagePickerController拍摄图像

我使用这种委托方法获取图像。

- (void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary*)info 
{ 

     UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"]; 

}

但是，当我在ImageView中使用该图像或将图像数据发送到某个url时，图像出现旋转90度。

问题是什么？我做得对吗？

谢谢

来源

2010-01-09 Biranchi

您需要根据自己的方向自己旋转图片。

使用此代码（也可以调整您的图片），我发现它的地方，中网，但不记得在哪里：

@implementation UIImage (Resizing) 

static inline double radians (double degrees) {return degrees * M_PI/180;} 


- (UIImage*)imageByScalingToSize:(CGSize)targetSize { 
UIImage* sourceImage = self; 
CGFloat targetWidth = targetSize.width; 
CGFloat targetHeight = targetSize.height; 

CGImageRef imageRef = [sourceImage CGImage]; 
CGBitmapInfo bitmapInfo = CGImageGetBitmapInfo(imageRef); 
CGColorSpaceRef colorSpaceInfo = CGImageGetColorSpace(imageRef); 

if (bitmapInfo == kCGImageAlphaNone) { 
    bitmapInfo = kCGImageAlphaNoneSkipLast; 
} 

CGContextRef bitmap; 

if (sourceImage.imageOrientation == UIImageOrientationUp || sourceImage.imageOrientation == UIImageOrientationDown) { 
    bitmap = CGBitmapContextCreate(NULL, targetWidth, targetHeight, CGImageGetBitsPerComponent(imageRef), CGImageGetBytesPerRow(imageRef), colorSpaceInfo, bitmapInfo); 

} else { 
    bitmap = CGBitmapContextCreate(NULL, targetHeight, targetWidth, CGImageGetBitsPerComponent(imageRef), CGImageGetBytesPerRow(imageRef), colorSpaceInfo, bitmapInfo); 

}  

if (sourceImage.imageOrientation == UIImageOrientationLeft) { 
    CGContextRotateCTM (bitmap, radians(90)); 
    CGContextTranslateCTM (bitmap, 0, -targetHeight); 

} else if (sourceImage.imageOrientation == UIImageOrientationRight) { 
    CGContextRotateCTM (bitmap, radians(-90)); 
    CGContextTranslateCTM (bitmap, -targetWidth, 0); 

} else if (sourceImage.imageOrientation == UIImageOrientationUp) { 
    // NOTHING 
} else if (sourceImage.imageOrientation == UIImageOrientationDown) { 
    CGContextTranslateCTM (bitmap, targetWidth, targetHeight); 
    CGContextRotateCTM (bitmap, radians(-180.)); 
} 

CGContextDrawImage(bitmap, CGRectMake(0, 0, targetWidth, targetHeight), imageRef); 
CGImageRef ref = CGBitmapContextCreateImage(bitmap); 
UIImage* newImage = [UIImage imageWithCGImage:ref]; 

//CGContextRelease(bitmap); 
//CGImageRelease(ref); 

return newImage; 
} 

@end

来源

2010-03-04 11:19:06 maxbareis

使用UIImagePickerController拍摄图像

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