如何在iPhone的顯示從文件夾圖像圖像ViewI

Question

我想顯示保存在文件夾的問題圖像是返回文件名，但它不會在圖像查看

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

      NSString*test=@"nicej"; 

      patientlastName=[test stringByReplacingOccurrencesOfString:@" " withString:@""]; 
     NSString * filePath = [NSString stringWithFormat:@"%@/Documents//%@.png", NSHomeDirectory(),patientlastName]; 


     BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:filePath]; 
     if (fileExists == 0) 
     { 
      NSLog(@"File is Not exists"); 

      appDelegate.imageURL=@"File Not Exists"; 

     } 

     NSString *userfile=[NSString stringWithFormat:@"%@",patientlastName]; 
     appDelegate.imageURL=userfile; 

      PictureDisplayViewController *targetController = [[PictureDisplayViewController alloc] initWithNibName:@"PictureDisplayViewController" bundle:nil]; 
     targetController.modalPresentationStyle = UIModalPresentationFullScreen; 
     [self.splitViewController presentViewController:targetController animated:YES completion:nil]; 

顯示圖像在PictureDisplayViewController

  imageView.image=[UIImage imageNamed:@"nicej.png"]; 

Answer 1

試試這個代碼：

圖像保存在這條道路：

NSFileManager *fileMan = [NSFileManager defaultManager]; 

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

    NSString *str= [NSString stringWithFormat:@"%@.png",patientlastName]; 
    NSString *Image_filePath=[documentsDirectory stringByAppendingPathComponent:str]; 
NSData *imagedata=UIImagePNGRepresentation(yourimage); 
[fileMan createFileAtPath:[Image_filePath stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding] contents:imagedata attributes:nil]; 

獲取圖像路徑：

NSString* fileName = [NSString stringWithFormat:@"%@.png",patientlastName} 
     NSArray *arrayPaths = 
     NSSearchPathForDirectoriesInDomains(
              NSDocumentDirectory, 
              NSUserDomainMask, 
              YES); 
     NSString *path = [arrayPaths objectAtIndex:0]; 
     NSString* pdfFileName = [path stringByAppendingPathComponent:fileName]; 

     UIImage *image1=[UIImage imageWithContentsOfFile:pdfFileName]; 
     imageView.image=image1; 

Answer 2

//suppose imgpath is path of your image in doument directory then use these two lines of code. 

NSData *imgData = [NSData dataWithContentsOfFile:imgPath]; 

imageView.image = [[UIImage alloc] initWithData:imgData]; 

Answer 3

在PictureDisplayViewController，您加載與imageNamed方法圖像實際上不起作用，直到你有圖像與同名到您的捆綁。 您可以加載圖像等作爲跟隨...

在PictureDisplayViewController你已經有路徑，圖像比

imageView.image= [UIImage imageWithContentsOfFile:filePathWithName]; 

Answer 4

我修改代碼：

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

       NSString*test=@"nicej"; 

       patientlastName=[test stringByReplacingOccurrencesOfString:@" " withString:@""]; 
      NSString * filePath = [NSString stringWithFormat:@"%@/Documents//%@.png", NSHomeDirectory(),patientlastName]; 


      BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:filePath]; 
      if (fileExists == 0) 
      { 
       NSLog(@"File is Not exists"); 

       appDelegate.imagePath=@""; 

      } 
      else 
      { 
       appDelegate.imagePath=filePath; 
      } 

       PictureDisplayViewController *targetController = [[PictureDisplayViewController alloc] initWithNibName:@"PictureDisplayViewController" bundle:nil]; 
      targetController.modalPresentationStyle = UIModalPresentationFullScreen; 
      [self.splitViewController presentViewController:targetController animated:YES completion:nil]; 

在PictureDisplayViewController

if(appDelegate.imagePath) 
{ 
    UIImage *image=[UIImage imageWithContentsOfFile:appDelegate.imagePath]; 
} 
else 
{ 
    imageView.image=[UIImage imageNamed:@"default.png"]; 
} 

default.png是默認的png PIC組合中的資源