Reading and Writing files in ios

In ios, Apple has encapsulated a class and opened the corresponding IPA. The corresponding class is NSFileManager and the file management class.

Instantiation:

[Plain]
NSFileManager * manage = [NSFileManager defaultManager];

NSFileManager * manage = [NSFileManager defaultManager];

Create a file directory

[Plain]
[Manage createDirectoryAtPath: direcatorypath withIntermediateDirectories: YES attributes: nil error: nil];

[Manage createDirectoryAtPath: direcatorypath withIntermediateDirectories: YES attributes: nil error: nil];

Returns the bool type and determines whether the bool type is successfully created.

If you write data to a file, such as NSData, you can:

[Plain]
BOOL isWrite = [_ data writeToFile: filepath atomically: YES];

BOOL isWrite = [_ data writeToFile: filepath atomically: YES];

Returns the result and determines whether the operation is successful.

Copy an object:

[Plain]
-(BOOL) copyItemAtPath :( NSString *) srcPath toPath :( NSString *) dstPath error :( NSError **) error NS_AVAILABLE (10_5, 2_0 );

-(BOOL) copyItemAtPath :( NSString *) srcPath toPath :( NSString *) dstPath error :( NSError **) error NS_AVAILABLE (10_5, 2_0 );

Transfer:

[Plain]
-(BOOL) moveItemAtPath :( NSString *) srcPath toPath :( NSString *) dstPath error :( NSError **) error NS_AVAILABLE (10_5, 2_0 );

-(BOOL) moveItemAtPath :( NSString *) srcPath toPath :( NSString *) dstPath error :( NSError **) error NS_AVAILABLE (10_5, 2_0 );

Delete:

[Plain]
-(BOOL) removeItemAtPath :( NSString *) path error :( NSError **) error NS_AVAILABLE (10_5, 2_0 );

-(BOOL) removeItemAtPath :( NSString *) path error :( NSError **) error NS_AVAILABLE (10_5, 2_0 );

Whether the file exists:

[Plain]
-(BOOL) fileExistsAtPath :( NSString *) path;

-(BOOL) fileExistsAtPath :( NSString *) path;

Whether the file can be read:

[Plain]
-(BOOL) isReadableFileAtPath :( NSString *) path;

-(BOOL) isReadableFileAtPath :( NSString *) path;