如何從特定文件夾中的iPhone

Question

檢索的UIImage文件目錄

我已經使用這個函數的本地存儲圖像文件的目錄中創建

NSError *error; 
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString* documentsDirectory = [paths objectAtIndex:0]; 

// FOR STORING IMAGE INTO FOLDER CREATED IN DOCUMENT DIRECTORY 

NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:@"/ImagesFolder"];  
if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath]) 
[[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error]; 

NSData* imageData = UIImagePNGRepresentation(imageView.image); 
NSString* incrementedImgStr = [NSString stringWithFormat:@"Image%d.png",delegate.dirCountImages]; 
NSString* fullPathToFile2 = [dataPath stringByAppendingPathComponent:incrementedImgStr]; 
[imageData writeToFile:fullPathToFile2 atomically:NO]; 

但是我如何檢索特定文件夾的圖像在一個文件夾中文件目錄

Answer 1

-(NSMutableArray*)getPhotoFileNames:(NSString*)parentFolderName 
{ 
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) 
    { 
     UIImage  *originalImage = [UIImage imageWithContentsOfFile:fullFilePath]; 
     [fileArray addObject:originalImage]; 
    } 
} 
return fileArray; 
} 

Answer 2

只需要有完整的路徑和使用此方法。 [[UIImage alloc]initWithContentsOfFile: <#path#>]如果您不使用ARC，請記住釋放圖像。

Answer 3

UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(100,100,100,100)]; 
imageView.image = [[UIImage alloc] initWithData:myImage]; 

[myView addSubview:imageView]; 

或看到該鏈接http://www.iphonedevsdk.com/forum/iphone-sdk-development/23840-placing-image-url-image-view.html

Answer 4

也許這會幫助你。

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"Images"]; 
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"Image.png"]; 
[cell.songImageView setImage:[UIImage imageWithContentsOfFile:documentsDirectory]];