如何從iPhone中的指定圖像路徑檢索圖像

Question

嗨如何從iPhone中的指定圖像路徑檢索圖像。在我的代碼是

- (void)imagePickerController:(UIImagePickerController *)UIPicker didFinishPickingImage:(UIImage *)info editingInfo:(NSDictionary *)dictionary 
{ 
    imageView.image=info; 
    [UIPicker dismissModalViewControllerAnimated:YES]; 
    NSLog(@"UImage path= %@",imageView.image); 
    NSData* imageData = UIImagePNGRepresentation(imageView.image); 
    NSString* imageName = @"MyImage.png"; 
    NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString* documentsDirectory = [paths objectAtIndex:0]; 
    NSString *fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName]; 
    [imageData writeToFile:fullPathToFile atomically:NO]; 
    NSLog(@"Image path = %@",fullPathToFile); 
} 

當我選擇圖像，圖像應放置，它將成功放置到圖像視圖。我得到了圖像路徑。

當我執行控制檯應用程序這表明

Image path=document = /Users/rr-mac/Library/Application Support/iPhone Simulator/4.3/Applications/46C716D0-13E9-4DF2-BC46-F1071DFCE14C/Documents/MyImage.png 

我的圖像存儲在這個指定的路徑。在這裏，我如何檢索這個圖像並將其放置到imageview。任何人都可以幫我提供代碼。

在此先感謝。

Answer 1

要在目錄路徑檢索UIImage的，你應該使用：

UIImage *image = [UIImage imageWithContentsOfFile:fullPathToFile]; 

全碼：

NSString *imageName = @"MyImage.png"; 
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
NSString *fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName]; 
UIImage *image = [UIImage imageWithContentsOfFile:fullPathToFile]; 
self.imageView.image = image; 

Answer 2

如果你的圖像放在您的應用程序，你可以使用下面的代碼的文件夾下，

yourImageView.image = [UIImage imageNamed:@"MyImage.png"]; 

Answer 3

在之前回答您的意見，我加入這個

通過獲取doc目錄

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

追加圖像路徑到此docdirpath，然後在的UIImage使用它imageNamed:方法。

Answer 4

答案在你的問題本身。

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

    fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName]; 

    imageView.image = [UIImage imageNamed:fullPathToFile];