NSFileManager *fileManager = [NSFileManager defaultManager]; NSString *str1 = NSHomeDirectory(); _filePath = [[NSString stringWithFormat:@"%@/Documents/imageViews/test.plist",str1]retain]; NSLog(@"%@",_filePath); if(![fileManager fileExistsAtPath:_filePath]){//如果不存在,则说明是第一次运行这个程序,那么建立这个文件夹 NSLog(@"first run"); NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]; NSString *directryPath = [path stringByAppendingPathComponent:@"imageViews"]; [fileManager createDirectoryAtPath:directryPath withIntermediateDirectories:YES attributes:nil error:nil]; NSString *filePath = [directryPath stringByAppendingPathComponent:@"test.plist"]; NSLog(@"%@",filePath); [fileManager createFileAtPath:filePath contents:nil attributes:nil]; ......... }
此段代码创建的filePath为
一、创建~/Documents/imageViews/test.plist的详细步骤
1、找到Documetnts目录所在的位置
NSString *str1 = NSHomeDirectory();
str1为/Users/yuqiu/Library/Application Support/iPhone Simulator/6.1/Applications/2A8EFE9E-4CCA-41D1-8A5F-1FF00A115FA3
2、加上Documetnts这层目录
NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
path为/Users/yuqiu/Library/Application Support/iPhone Simulator/6.1/Applications/2A8EFE9E-4CCA-41D1-8A5F-1FF00A115FA3/Documents
注意:使用的是stringByAppendingPathComponent:方法,不需要加“/"; 如果用的是别的方法加的话,需要写成@"/Documents".
ps:这里1、2两步可以简化为
NSArray *paths = NSSearchPathForDerictoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
NSString *path = [paths lastObject];
3、在Documetnts目录中创建名为imageViews的目录
NSFileManager *fileManager = [NSFileManager defaultManager]; NSString *directryPath = [path stringByAppendingPathComponent:@"imageViews"]; [fileManager createDirectoryAtPath:directryPath withIntermediateDirectories:YES attributes:nil error:nil];
创建NSFileManager的实例fileManager.NSFileManager这个类是专门进行文件管理的,可以创建文件,目录,删除,遍历目录等。我们调用了 createDirectoryAtPath:方法创建了一个新目录。
4、在imageViews目录里,创建文件test.plist.
NSString *filePath = [directryPath stringByAppendingPathComponent:@"test.plist"]; [fileManager createFileAtPath:filePath contents:nil attributes:nil];
调用createFileAtPath:创建文件
最后得到的整个文件路径为:
二、NSFileManager常用的文件管理操作
1、创建目录 createDirectoryAtPath:
2、创建文件 createFileAtPath:
3、删除某个文件 removeItemAtPath:
4、检查某个文件是否存在 fileExistsAtPath:
5、检查文件是否可读 isReadableFileAtPath:
是否可写:isWritableFileAtPath:
6、取得文件属性 fileAttributesAtPath:
改变文件属性changeAttributesAtPath:
7、从path代表的文件中读取数据:contentsAtPath
8、移动文件movePath:toPath:handler:
9、复制文件copyPath:toPath:handler: