我有这个代码,我拍了这张尺寸为2448x3264的照片,我需要调整大小并调整到左上角的屏幕显示。对不起我的英语谢谢
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
imagenUsr = [info objectForKey:UIImagePickerControllerOriginalImage];
NSLog(@"%f",imagenUsr.size.height); //2448px
NSLog(@"%f",imagenUsr.size.width); //3264px
}
我需要调整到320x568宽高比以填充所拍摄图像的顶部和左侧
答案 0 :(得分:11)
试试这个:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
imagenUsr = [info objectForKey:UIImagePickerControllerOriginalImage];
double width = imagenUsr.size.width;
double height = imagenUsr.size.height;
double screenWidth = self.view.frame.size.width;
double apect = width/height;
double nHeight = screenWidth/ apect;
self.imgView.frame = CGRectMake(0, 0, screenWidth, nHeight);
self.imgView.center = self.view.center;
self.imgView.image = imagenUsr;
}
这将帮助您像以前一样保持纵横比。
另一种方式是:
self.imgView.contentMode = UIViewContentModeScaleAspectFit;
self.imgView.image = imagenUsr;
希望这会有所帮助.. :)
答案 1 :(得分:3)
编辑:不确定我是否错过了这个或它已被编辑,但我没有看到你想要裁剪它。拉沙德的解决方案应该适合你。
您是否尝试过使用图片创建图片视图并将其添加到视图中?
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
imagenUsr = [info objectForKey:UIImagePickerControllerOriginalImage];
UIImageView *imageView = [[UIImageView alloc] initWithFrame:self.view.frame];
imageView.image = imagenUsr;
imageView.contentMode = UIViewContentModeScaleAspectFit;
[self.view addSubview:imageView];
}
答案 2 :(得分:3)
Swift 3.0 / 4.0
根据UIImageview帧大小,AspectFill图像裁剪/调整大小...。
func ResizeImage(with image: UIImage?, scaledToFill size: CGSize) -> UIImage? {
let scale: CGFloat = max(size.width / (image?.size.width ?? 0.0), size.height / (image?.size.height ?? 0.0))
let width: CGFloat = (image?.size.width ?? 0.0) * scale
let height: CGFloat = (image?.size.height ?? 0.0) * scale
let imageRect = CGRect(x: (size.width - width) / 2.0, y: (size.height - height) / 2.0, width: width, height: height)
UIGraphicsBeginImageContextWithOptions(size, false, 0)
image?.draw(in: imageRect)
let newImage: UIImage? = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return newImage
}