创建多级目录与配置文件操作详解-优快云博客

注意2点：

1、创建多级目录的文件时，要先判断其目录是否存在，如果不存在就创建该目录，如果没有创建该目录，文件是不能创建成功的

2、不要使用- (BOOL)createDirectoryAtPath:(NSString *)path attributes:(NSDictionary *)attributes，这个方法在模拟器中可能能成功运行，但在设备上肯定不行的，

改用- (BOOL)createDirectoryAtPath:(NSString *)path withIntermediateDirectories:(BOOL)createIntermediates attributes:(NSDictionary *)attributes error:(NSError **)error，

记得将createIntermediates设置为YES，这样就能建立多级目录了。如果是一级目录，可以设置为NO。

demo如下：

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *strFile = [documentsDirectory stringByAppendingPathComponent:@"hello/config.plist"];
    NSLog(@"strFile: %@", strFile);

    NSString *strPath = [documentsDirectory stringByAppendingPathComponent:@"hello"];
    if (![[NSFileManager defaultManager] fileExistsAtPath:strPath]) {
        NSLog(@"there is no Directory: %@",strPath);
        [[NSFileManager defaultManager] createDirectoryAtPath:strPath withIntermediateDirectories:YES attributes:nil error:nil];
    }

    NSArray *keys = [NSArray arrayWithObjects: @"username", @"password", @"serverName", @"serverPort", @"autoSave", nil];
    NSArray *values = [NSArray arrayWithObjects: @"11", @"11", @"11", @"11", @"11", nil];

    NSDictionary *configInfo = [[NSDictionary alloc] initWithObjects: values forKeys:keys];
    if (![configInfo writeToFile: strFile atomically: YES]) {
        NSLog(@"write file error");
    }

转载于:https://www.cnblogs.com/pClass/archive/2011/08/28/2201922.html