Ios 如何将文档目录中的图像加载到Objective-C中的图像视图中

您应该尝试以下代码从文档目录保存和检索图像：

我已经在AppDelegate.m中实现了这些方法

NSString *path = [NSString stringWithFormat:@"%@/%@",[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES) objectAtIndex:0], parentFolderName] ;
NSArray *dirContents = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:nil];
NSEnumerator *enumerator = [dirContents objectEnumerator] ;
id fileName ;
NSMutableArray *fileArray = [[NSMutableArray alloc] init] ;
while (fileName = [enumerator nextObject])
{
    NSString *fullFilePath = [path stringByAppendingPathComponent:fileName];
    NSRange textRangeJpg = [[fileName lowercaseString] rangeOfString:[@".png" lowercaseString]];

    if (textRangeJpg.location != NSNotFound)
    {
        originalImage = [UIImage imageWithContentsOfFile:fullFilePath];
        [fileArray addObject:originalImage];
    }
}

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@Sandy请尝试以下代码

 -(NSString *)getDocumentDirectoryPath:(NSString *)Name
 {
      NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,  NSUserDomainMask, YES);
      NSString *documentsDirectory = [paths objectAtIndex:0];
      NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:Name];
      NSLog(@"savedImagePath: %@", savedImagePath);
      return savedImagePath;
 }

 -(BOOL)saveImage:(UIImage *)image withName:(NSString *)Name
 {
      NSData *imageData = UIImagePNGRepresentation(image);
      BOOL success = [imageData writeToFile:[AppDelegate getDocumentDirectoryPath:Name] atomically:NO];
      return success;
 }

 -(UIImage *)getRealtorImage:(NSString *)Name
 {    
      UIImage *img = [UIImage imageWithContentsOfFile:[AppDelegate getDocumentDirectoryPath:Name]];
      return img;
 }

---

你面临的问题是什么？请提供您面临的问题的详细信息？图像未显示在图像视图中我正在获取图像数组列表我想要显示图像？您是否收到任何错误？您是否设置了断点并检查了

fullFilePath

？你在用

fileArray

做什么？这只是一个数组，发布如何将图像添加到屏幕上的代码。while（文件名=[enumerator nextObject]）{NSString*fullFilePath=[path stringByAppendingPathComponent:fileName]；NSRange textRangeJpg=[[fileName lowercaseString]rangeOfString:[@.png“lowercaseString]”；如果（textRangeJpg.location！=NSNotFound）{originalImage=[UIImage withcontentsoffile:fullFilePath]；/[fileArray addObject:originalImage]；_drawingView.backgroundColor=[uicolorWithpatternImage:[fileArray objectAtIndex:0]；}}返回fileArray；格式化并将其放入问题中这样每个人都能正确地看到它。

    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(100,100,200,200)];     
    NSData *imgData = [[NSData alloc] initWithContentsOfURL:[NSURL fileURLWithPath:imageFilePath]];
        if (imgData != nil) 
        { 
             UIImage *thumbNail = [[UIImage alloc] initWithData:imgData];
             imageView.image = thumbNail;                                                                                   
        }
[self.view addSubView:imageView];