Question

我使用此代码在项目中创建了一个目录

NSError * error = nil;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);    
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:@"/createDirectory1"];

if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath]) 
{
    [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error]; //Create folder
    NSLog(@"Create a new Dir");
}
else 
{
    NSLog(@"Dir already exist");
}

现在我要检查目录是否存在？我怎样才能通过客观的c代码得到它？

Answer 1

import UIKit

class NavigationBarView: UIView {

    @IBOutlet var view: UIView!

    required init(coder aDecoder: NSCoder){
        super.init(coder: aDecoder)

        NSBundle.mainBundle().loadNibNamed("NavigationBarView", owner: self, options: nil)
        self.addSubview(self.view)
    }
}

Answer 2

首先，你应该得到项目路径。你可以像下面的代码那样做。

NSString *getProjectPath(){
    NSString *projectPath = [NSString stringWithFormat:@"%s,__FILE__]; // your project path may have some same  prefix  to the macro __FILE__. 
    // do something 
    return projectPath;
}

然后你用 [[NSFileManager defaultManager] fileExistsAtPath：dataPath]检查它是否存在

Answer 3

BOOL fileOrDirectoryExists = [[NSFileManager defaultManager] fileExistsAtPath:dataPath];

fileExistsAtPath:dataPath方法返回一个布尔值，指示文件或目录是否存在于指定路径中。你已经在做了，正如雷木思所说的那样。

想知道使用目标c在我的Xcode项目中是否存在目录？

3 个答案: