获取设置数据和保存设置的代码

@interface ViewController :
UIViewController

<UIPickerViewDelegate,UIPickerViewDataSource>

@property (nonatomic)
IBOutlet UITextField * username;

@property (nonatomic)
IBOutlet UIPickerView * job;

@property (nonatomic)
IBOutlet UISwitch * maritalStatus;

@property (nonatomic)
IBOutlet UISlider * mentalState;

@implementation ViewController
{
NSMutableArray * jobTitles;
NSMutableArray * jobValues;
NSString * selectJob;
}

@synthesize username;

@synthesize job;
@synthesize maritalStatus;
@synthesize mentalState;



-(void) initJobs
{

jobTitles = [[NSMutableArrayalloc]init];
[jobTitlesaddObject:@"学生"];
[jobTitlesaddObject:@"教师"];
[jobTitlesaddObject:@"其他"];

jobValues = [[NSMutableArrayalloc]init];

[jobValuesaddObject:@"student"];

[jobValuesaddObject:@"teacher"];
[jobValuesaddObject:@"other"];
}

-(void) loadSettings
{

NSUserDefaults * defaults = [NSUserDefaultsstandardUserDefaults];

//设置页面上的textField
username.text = [defaultsstringForKey:@"username"];

//设置页面上的控件pickerView

selectJob = [NSStringstringWithString:[defaults
stringForKey:@"job"]];
int seIndex = [jobValuesindexOfObject:selectJob];

[jobselectRow:seIndex
inComponent:0animated:YES];

//设置页面上的结婚状态
[maritalStatussetOn:[defaults
boolForKey:@"maritalStatus"]animated:YES];

//设置页面上的精神状态

[mentalStatesetValue:[defaults
integerForKey:@"mentalState"]animated:YES];

}
-(void) saveSettings
{

NSUserDefaults * defaults = [NSUserDefaultsstandardUserDefaults];

//保存用户名到设置中心
[defaultssetObject:username.textforKey:@"username"];

//保存工作到设置中心

int selIdx = [jobselectedRowInComponent:0];//selectedRowInComponent返回下标为0的componet的当前的行的下标由于本程序只有1个component,所以是0
id val = [jobValuesobjectAtIndex:selIdx] ;
[defaultssetObject:val
forKey:@"job"];

//保存婚姻状况到设置中心
[defaultssetBool:maritalStatus.onforKey:@"maritalStatus"];

//保存精神状态到设置中心
[defaultssetInteger:mentalState.valueforKey:@"mentalState"];
}