There are several methods for reading and writing files in the sandbox, and several methods for reading and writing files in the sandbox.

There are several methods for reading and writing files in the sandbox, and several methods for reading and writing files in the sandbox.

@ Implementation ViewController

-(Void) viewDidLoad {

[Super viewDidLoad];

// H obtain the application sandbox

NSString * homaPath = NSHomeDirectory ();

NSLog (@ "% @", homaPath );

}

 

/**

* Below is how to save data using plist

*/

-(Void) savePlist {

NSString * homePath = NSHomeDirectory ();

NSString * filePath = [homePath stringByAppendingPathComponent: @ "Docments"];

// Specify the file format

NSString * format = [filePath stringByAppendingPathComponent: @ "xx. plist"];

NSArray * data = @ [@ "fang LAN Feng 1", @ "fang LAN Feng 2"];

[Data writeToFile: format atomically: YES];

 

// The second method is provided by the system.

NSString * dataPath = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES) [0];

NSString * filePathNssear = [dataPath stringByAppendingPathComponent: @ "xx. plist"];

}

 

/**

* Plist reads data.

*/

-(Void) readPlist {

// Specify the file

NSString * homePath = NSHomeDirectory ();

NSString * filePath = [homePath stringByAppendingPathComponent: @ "Documents"];

// Obtain data

NSArray * data = [NSArray arrayWithContentsOfFile: filePath];

}

 

 

// Preference method ---> preference settings

-(Void) preferenceSave {

NSUserDefaults * ud = [NSUserDefaults standardUserDefaults];

[Ud setObject: @ "value11" forKey: @ "key1"];

[Ud setObject: @ "value2" forKey: @ "key2"];

// Synchronization. Make sure to write this step.

[Ud synchronize];

}

/**

* The following is the preference reading method.

*/

-(Void) preferenceRead {

NSUserDefaults * ud = [NSUserDefaults standardUserDefaults];

NSLog (@ "% @", [ud objectForKey: @ "key1"]);

}

/**

* Data Storage and reading ==>>>>>> archive and archive

*/

-(Void) keyedArchiverWrite {

NSString * docPath = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES) [0];

NSString * filePath = [docPath stringByAppendingPathComponent: @ "xx. data"];

Teacher * teacher = [[Teacher alloc] init];

Teacher. name = @ "junk ";

Teacher. age = 10;

// Archive

[NSKeyedArchiver archiveRootObject: teacher toFile: filePath];

}

 

 

-(Void) keyedUnarchiverRead {

NSString * filePath = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES) [0];

NSString * documentType = [filePath stringByAppendingPathComponent: @ "xx. data"];

Teacher * taecher = [NSKeyedUnarchiver unarchiveObjectWithFile: documentType];

}

 

 

@ End