我们如何从当地获取图像？

Question

我通过此代码将图像存储在本地...

NSData *imageData = UIImagePNGRepresentation(image);
NSString *imageName = [NSString stringWithFormat:@"image.png"];

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName];

[imageData writeToFile：fullPathToFile atomically：YES];

我可以在我的iphone模拟器套装中看到这个图像...但是我该如何取回这张图片呢？

Answer 1

如果您的意思是从文件中重新创建图像，则可以使用UIImage的{​​{3}}方法非常简单地执行此操作：

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullPathToFile = [documentsDirectory stringByAppendingPathComponent:@"someImageName"];
UIImage *image = [UIImage imageWithContentsOfFile:fullPathToFile];