具有自定义值的可重用Obj-C类:正确的方法

我试图在iPhone应用程序之间重用一组Obj-C类。不同应用程序之间的值已经被隔离,我正在尝试找出将这些自定义值应用于基于应用程序的类的最佳方法。

// I might have 10 customizable values for each class, that's a long signature!
CarController *controller = [[CarController alloc] initWithFontName:@"Vroom" engine:@"Diesel" color:@"Red" number:11];

我应该把它们放在大箱子里吗 settings.plist ?

// Wasteful!  I sometimes only use 2-3 of 50 settings!
AllMyAppSettings *settings = [[AllMyAppSettings alloc] initFromDisk:@"settings.plist"];
CarController *controller = [[CarController alloc] initWithSettings:settings];
[settings release];

我应该有一点,可选的吗 n_settings.plist 每节课有多少?

// Sometimes I customize
CarControllerSettings *carSettings = [[CarControllerSettings alloc] initFromDisk:@"car_settings.plist"];
CarController *controller = [[CarController alloc] initWithSettings:carSettings];
[carSettings release];

// Sometimes I don't, and CarController falls back to internally stored, reasonable defaults.
CarController *controller = [[CarController alloc] initWithSettings:nil];