从文档目录加载UIImage [英] Load UIImage from documents directory

问题描述

我正在尝试从文档目录加载 UIImage 并将其设置为 UIImageView ，如下所示：

I'm trying to load a UIImage from the documents directory and set it to a UIImageView as per below:

NSString  *pngfile = [[MyUtil getLocalDirectory] stringByAppendingPathComponent:@"school.png"];
NSLog(@"%@", pngfile);
if ([[NSFileManager defaultManager] fileExistsAtPath:pngfile]) {
    NSData *imageData = [NSData dataWithContentsOfFile:pngfile];            
    UIImage *img = [UIImage imageWithData:imageData];
    [schoolImage setImage:img];
}

但是，每当我尝试上述操作时，图像都不会加载。该图片位于 Documents / MyAppCustomDirectory / school.png 中。以上是否正确加载该目录？

However, whenever I try the above, the image never loads. The image is in Documents/MyAppCustomDirectory/school.png. Is the above correct to load from that directory?

我还尝试了其他几个： UIImage imageWithContentsOfFile ，等等基于SO响应的方法。

I also tried a few others: UIImage imageWithContentsOfFile, among other ways based on SO responses.

推荐答案

要获取文档目录，您应该使用：

To get the documents directory you should use:

NSArray  *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDir  = [documentPaths objectAtIndex:0];
NSString  *pngfile = [documentsDir stringByAppendingPathComponent:@"school.png"];

我不太确定你是否还需要附加'MyAppCustomDirectory'，但我不知道不这么认为。

I'm not quite sure if you also need to append the 'MyAppCustomDirectory', but I don't think so.

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