上傳后IOS UIImagePickerController結果圖像定向我正在iOS3.1.3 iPhone上測試我的iPhone應用程序。我使用UIImagePickerController:UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];[imagePicker setSourceType:
UIImagePickerControllerSourceTypeCamera];[imagePicker setDelegate:self];[self.navigationController presentModalViewController:
imagePicker animated:YES];[imagePicker release];- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:
(NSDictionary *)info {
self.image = [info objectForKey:UIImagePickerControllerOriginalImage];
imageView.image = self.image;
[self.navigationController dismissModalViewControllerAnimated:YES];
submitButton.enabled = YES;}然后在某個時候使用ASI類將其發送到我的Web服務器：ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:@"
[request setDelegate:self];[request setStringEncoding:NSUTF8StringEncoding];[request setShouldContinueWhenAppEntersBackground:YES];
//other post keys/values[request setFile:UIImageJPEGRepresentation(self.image, 100.0f) withFileName:[NSString stringWithFormat:@"%d.jpg",
[[NSDate date] timeIntervalSinceNow]] andContentType:@"image/jpg" forKey:@"imageFile"];[request startAsynchronous];問題是：當我和iPhone合影時，圖像會上傳到服務器上，并按您的預期進行查看。當拍照時，拿著手機的肖像，圖像上傳和查看，因為它已經旋轉了90度。我的應用程序被設置為只工作在縱向模式(倒置和常規)。如何使圖片上傳后始終顯示正確的方向？在UIImageView中顯示的圖像似乎是正確的(在拍照后直接顯示)，但服務器上的查看則不然。
3 回答
慕姐4208626
TA貢獻1852條經驗 獲得超7個贊
- (UIImage *)normalizedImage {
if (self.imageOrientation == UIImageOrientationUp) return self;
UIGraphicsBeginImageContextWithOptions(self.size, NO, self.scale);
[self drawInRect:(CGRect){0, 0, self.size}];
UIImage *normalizedImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return normalizedImage;}scale
料青山看我應如是
TA貢獻1772條經驗 獲得超8個贊
func normalizedImage() -> UIImage {
if (self.imageOrientation == UIImageOrientation.Up) {
return self;
}
UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale);
let rect = CGRect(x: 0, y: 0, width: self.size.width, height: self.size.height)
self.drawInRect(rect)
let normalizedImage : UIImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext();
return normalizedImage;}func fixOrientation(img:UIImage) -> UIImage {
if (img.imageOrientation == UIImageOrientation.Up) {
return img;
}
UIGraphicsBeginImageContextWithOptions(img.size, false, img.scale);
let rect = CGRect(x: 0, y: 0, width: img.size.width, height: img.size.height)
img.drawInRect(rect)
let normalizedImage : UIImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext();
return normalizedImage;}func fixOrientation(img: UIImage) -> UIImage {
if (img.imageOrientation == .up) {
return img }
UIGraphicsBeginImageContextWithOptions(img.size, false, img.scale)
let rect = CGRect(x: 0, y: 0, width: img.size.width, height: img.size.height)
img.draw(in: rect)
let normalizedImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
return normalizedImage}
慕絲7291255
TA貢獻1859條經驗 獲得超6個贊
A UIImageimageOrientationUIImageViewUIImage
UIImage
UIImage+FixOrientOriented.h
@interface UIImage (fixOrientation)- (UIImage *)fixOrientation;@end
UIImage+FixOrientOriented.m
@implementation UIImage (fixOrientation)- (UIImage *)fixOrientation {
// No-op if the orientation is already correct
if (self.imageOrientation == UIImageOrientationUp) return self;
// We need to calculate the proper transformation to make the image upright.
// We do it in 2 steps: Rotate if Left/Right/Down, and then flip if Mirrored.
CGAffineTransform transform = CGAffineTransformIdentity;
switch (self.imageOrientation) {
case UIImageOrientationDown:
case UIImageOrientationDownMirrored:
transform = CGAffineTransformTranslate(transform, self.size.width, self.size.height);
transform = CGAffineTransformRotate(transform, M_PI);
break;
case UIImageOrientationLeft:
case UIImageOrientationLeftMirrored:
transform = CGAffineTransformTranslate(transform, self.size.width, 0);
transform = CGAffineTransformRotate(transform, M_PI_2);
break;
case UIImageOrientationRight:
case UIImageOrientationRightMirrored:
transform = CGAffineTransformTranslate(transform, 0, self.size.height);
transform = CGAffineTransformRotate(transform, -M_PI_2);
break;
case UIImageOrientationUp:
case UIImageOrientationUpMirrored:
break;
}
switch (self.imageOrientation) {
case UIImageOrientationUpMirrored:
case UIImageOrientationDownMirrored:
transform = CGAffineTransformTranslate(transform, self.size.width, 0);
transform = CGAffineTransformScale(transform, -1, 1);
break;
case UIImageOrientationLeftMirrored:
case UIImageOrientationRightMirrored:
transform = CGAffineTransformTranslate(transform, self.size.height, 0);
transform = CGAffineTransformScale(transform, -1, 1);
break;
case UIImageOrientationUp:
case UIImageOrientationDown:
case UIImageOrientationLeft:
case UIImageOrientationRight:
break;
}
// Now we draw the underlying CGImage into a new context, applying the transform
// calculated above.
CGContextRef ctx = CGBitmapContextCreate(NULL, self.size.width, self.size.height,
CGImageGetBitsPerComponent(self.CGImage), 0,
CGImageGetColorSpace(self.CGImage),
CGImageGetBitmapInfo(self.CGImage));
CGContextConcatCTM(ctx, transform);
switch (self.imageOrientation) {
case UIImageOrientationLeft:
case UIImageOrientationLeftMirrored:
case UIImageOrientationRight:
case UIImageOrientationRightMirrored:
// Grr...
CGContextDrawImage(ctx, CGRectMake(0,0,self.size.height,self.size.width), self.CGImage);
break;
default:
CGContextDrawImage(ctx, CGRectMake(0,0,self.size.width,self.size.height), self.CGImage);
break;
}
// And now we just create a new UIImage from the drawing context
CGImageRef cgimg = CGBitmapContextCreateImage(ctx);
UIImage *img = [UIImage imageWithCGImage:cgimg];
CGContextRelease(ctx);
CGImageRelease(cgimg);
return img;}@end- 3 回答
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