Iphone：如何在圖像視圖中顯示文檔目錄圖像？

Question

中存儲的文檔目錄文件夾一個應用圖片，

我想在圖片查看特定的圖像顯示，

如何在圖像查看圖像顯示在文檔目錄？

Answer 1

示例代碼：

- (NSString *)applicationDocumentsDirectory { 
    return [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]; 
} 

-(void)loadimage{ 
    NSString *workSpacePath=[[self applicationDocumentsDirectory] stringByAppendingPathComponent:@"your image-name"]; 
    UIImageView *myimage=[UIImageView alloc] initWithFrame:CGRectMake(0,0,20,20)]; 
    myimage.image=[UIImage imageWithData:[NSData dataWithContentsOfFile:workSpacePath]];  
    [self.view addSubView:myimage]; 
    [myimage release]; 
} 

TNQ

Answer 2

在這裏，您可以採取的UIImageView在您的視圖，並將其添加到視圖做同樣類似如下：

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

imageFilePath = [documentsDirectory stringByAppendingPathComponent:@"image1.png"]; 

UIImageView *objImageView = [[UIImageView alloc] initWithFrame:CGRectMake(10, 10, 100, 100)]; 
objImageView.image = [UIImage imageWithContentsOfFile: imageFilePath]; 
[self.view addSubVIew:objImageView.image]; 
[objImageView release]; 

請讓我知道你是否仍然需要任何幫助。

Answer 3

NSArray *directoryPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES); 
NSString *imagePath = [directoryPath objectAtIndex:0]; 
imagePath= [imagePath stringByAppendingPathComponent:@"imagename.png"]; 

NSData *data = [NSData dataWithContentsOfFile:imagePath]; 
    UIImage *img = = [UIImage imageWithData:data]; 

可以顯示此圖片的UIImageView

Answer 4

可以實現它，通過了解你的圖像的名字，所以當你在存儲你的形象，你需要存儲這些圖像的一些信息數據庫（或某些地方，你可以用它），然後取從數據源圖像的名稱，工作方式如下：

NSString *str = [NSString stringWithFormat:@"%@.jpg",[myGlobleArrayOfImageNames objectAtIndex:imageCounter]]; 
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
NSString *fullImgNm=[documentsDirectory stringByAppendingPathComponent:[NSString stringWithString:str]]; 
[mainSlideShowImageView setImage:[UIImage imageWithContentsOfFile:fullImgNm]]; 

Answer 5

你需要的代碼下面幾行從文件目錄

0獲得的UIImage

-(UIImage*)getImage:(NSString *)strImageName 
{ 
NSString *documentDirectory=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]; 
NSString *imagePath=[documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@",strImageName]]; 
UIImage *image=[UIImage imageWithContentsOfFile:imagePath]; 
return image; 
} 

調用上面的函數並使用UIImage對象來設置任何你想要的。 您也可以在普通的類中編寫此方法以在任何地方使用它。

Answer 6

添加到這些問題的答案，我覺得它很好的做法，以檢查文件是否存在這樣的...

NSString *directory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; 
NSString *file = [directory stringByAppendingPathComponent@"my_image.jpg"]; 
if ([[NSFileManager defaultManager] fileExistsAtPath:file]) { 
    self.myimageview = [UIImage imageWithData:[NSData dataWithContentsOfFile: file]]; 

} 

Answer 7

簡單使用此代碼

NSFileManager *filemgr =[NSFileManager defaultManager]; 
NSArray *dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES); 
NSString *docsDir = [dirPaths objectAtIndex:0]; 
NSString *dataPath = [docsDir stringByAppendingPathComponent:@"/yourdirectory/image.jpg"]; 
NSData *imgData = [[NSData alloc] initWithContentsOfURL:[NSURL fileURLWithPath:dataPath]]; 
self.imageview.image = [[UIImage alloc] initWithData:imgData];