創建在iPhone

Question

目錄有什麼不好呢？

#define AUDIO_NOTES_FOLDER [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/myApp/Pictures"] 

NSFileManager *NSFm= [NSFileManager defaultManager]; 
BOOL isDir=YES; 

if(![NSFm fileExistsAtPath:FILEPATH isDirectory:&isDir]) 
    if(![NSFm createDirectoryAtPath:FILEPATH attributes:nil]) 
     NSLog(@"Error: Create folder failed"); 

Answer 1

文件路徑標記未定義 - 您#define AUDIO_NOTES_FOLDER在你的文件的開頭，然後用FILEPATH中，而不是你的代碼。

還要注意的是NSHomeDirectory（）不一定是再找到文檔目錄的推薦的方法 - 而不是你可能想：

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

Answer 2

createDirectoryAtPath:attributes:已被棄用，而應該使用：

NSString *dirToCreate = [NSString stringWithFormat:@"%@/newDirectory",[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]]; 
    NSError *error = nil; 
    BOOL isDir; 
    if(![fm fileExistsAtPath:dirToCreate isDirectory:&isDir]) 
     if(![fm createDirectoryAtPath:dirToCreate withIntermediateDirectories:YES attributes:nil error:&error]) 
      NSLog(@"Error: Create folder failed");