iphone--使用NSUserDefaults存储数据

/Retrieving SwitchValue

NSUserDefaults*SwitchV = [NSUserDefaultsstandardUserDefaults];

IsOnoff= [SwitchVintegerForKey:@"integerKey"];//提取現有數值

//Retrieving TextField String

NSUserDefaults*TextFieldV = [NSUserDefaultsstandardUserDefaults];

NSString*TextFieldString = [TextFieldVstringForKey:@"TextFieldString"];

//Save SwitchValue

NSUserDefaults*SwitchV = [NSUserDefaultsstandardUserDefaults];

[SwitchVsetInteger:IsOnoffforKey:@"integerKey"];//更新數值

//Save TextField String

NSUserDefaults*TextFieldV = [NSUserDefaultsstandardUserDefaults];

[TextFieldVsetObject:theTextField.textforKey:@"TextFieldString"];

我們在程序起始位置，可以先設定一個默認值：

1. NSNumber *defaultValue = [NSNumber numberWithInt:1];//This is used for creating a NSNumber from a integer value.
2. NSDictionary *resourceDict = [NSDictionary dictionaryWithObject:defaultValue forKey:KeySound];
3. [[NSUserDefaults standardUserDefaults] registerDefaults:resourceDict];