I have encountered a similar problem to others on SO regarding the orientation of UIImages taken using the iPad camera. Essentially, I am taking a UIImage using the camera on the iPad. When I then display it, it has rotated through 90 degrees.
从阅读其他问题和答案来看,我现在的理解是,照相带照相机时,它储存着一台EXIF标记,确定照片的方向。 这通常允许所有麦克风和西里望读到这一取向数据。 然而,我正在把我的图像储存在文件目录中,如NSData(通过UIImagePNGRepresentation进行转换,并在核心数据中拯救URL)。 我正开始这样做,正造成我失去从中取回的图象。
谁能想办法纠正这种情况?
思想、建议和观点都受到欢迎。
Many thanks
EXIF元数据在定位上并不准确,在全球定位系统数据中准确,它将只检测90和90;180和amp; 270, 有一些Error案试图这样做。
iOS UIImPicker Controller在上载后得出图像方向
Good Luck
EXIF是图像档案,而不是UIImage。 当你带照相机拍照时,UIImagePicker从不把照片保存在档案中,因此,现在还没有EXIF。
但是,在你看来,问题与议会的方向无关。 我认为,UIImagePNGRepresentation总能节省90度(不论轮换)。 你在组建一个全国过渡政府之前,才需要轮换。 我不知道为什么这样做,但你只是需要围绕它开展工作。
查阅这一图书馆:http://vocaro.com/trevor/blog/2009/10/12/resize-a-uiimage-the-right-way/"rel=“nofollow”http://vocaro.com/trevor/blog/2009/10/12/resize-a-uiimage-the-right-way/ 他的法典通过改变形象来掌握形象,消除方向。
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