在iOS的文檔文件夾中創建多個目錄

Question

我想製作多個目錄，但我不知道如何。這是我的代碼，直到現在。

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { 
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
    if (self) { 
     // Custom initialization 
    } 
    return self; 

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder 
    NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:@"tops",@"bottoms",@"right" ]; 

    if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath]) 
     [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:nil]; //Create folder 

} 

我想有4個目錄，命名爲頂部底部右側和左側但是如果我做它用上述方法不工作..有沒有辦法使用這個代碼，以使多個目錄？或者是我的代碼錯了？謝謝！

Answer 1

試試看看這個代碼。

按照您的要求創建目錄。

NSArray *directoryNames = [NSArray arrayWithObjects:@"tops",@"bottoms",@"right",@"left",nil]; 
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder 

for (int i = 0; i < [directoryNames count] ; i++) { 
    NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:[directoryNames objectAtIndex:i]]; 
    if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath]) 
     [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:nil]; //Create folder 
} 

要在您的應用程序的任何位置使用您創建的目錄。

NSArray *directoryNames = [NSArray arrayWithObjects:@"tops",@"bottoms",@"right",@"left",nil]; 
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder 

// This will return the folder name in the 0 position. In yours "tops" 
NSString *topDirPath = [documentsDirectory stringByAppendingPathComponent:[directoryNames objectAtIndex:0]]; 
// This will return the file path in your "tops" folder 
NSString *filePath = [topDirPath stringByAppendingPathComponent:@"MYIMAGE"]; 

要保存圖像文件

NSData *imageDataToStore = UIImagePNGRepresentation(image); 
[imageDataToStore writeToFile:filePath atomically:YES]; 

若要檢索圖像文件

// Convert the file into data and then into image. 
NSData *imageData = [[NSData alloc] initWithContentsOfFile:filePath]; 
UIImage *yourImage = [UIImage imageWithData:imageData];