用户首选项的创建和保存

//  Copyright 用户首选项的创建和保存
//            1.保存方式:创建一个纯文本文件,或是使用更规范的格式(如XML)来保存
//            2.在数据库中保存首选项
//            3.使用USUserDefault
//
//            USUserInfo常见方法:
//                            1.standardUserDefaults 创建共享默认对象方法
//                            2.objectForKey         返回键的实例方法。保存在许多变体，可以返回特定对象类型,比如字符串、布尔值等
//                            3.setobjectForKey      设置对象值的实例方法。保存在许多变体，可以返回特定对象类型,比如字符串、布尔值等
//                            4.objectForKey         保存共享类对象发生的所有更改的类方法


#import "TheadViewController.h"

@interface TheadViewController ()

@end

@implementation TheadViewController

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        NSUserDefaults *myDefaults=[NSUserDefaults standardUserDefaults];
        
        //提取并设置声音值
        NSMutableArray *array1=[NSMutableDictionary
                                dictionaryWithObjectsAndKeys:@"Sounds",@"titleValue",
                                @"switch",@"accessoryValue",
                                [NSNumber numberWithBool:[myDefaults boolForKey:@"soundsValue"]],@"prefValue",
                                @"setSounds",@"targetValue",nil];
        
        //提取并设置音乐值
        NSMutableArray *array2=[NSMutableDictionary
                                dictionaryWithObjectsAndKeys:@"Music",@"titleValue",
                                @"switch",@"accessoryValue",
                                [NSNumber numberWithBool:[myDefaults boolForKey:@"MusicValue"]],@"prefValue",   //2
                                @"setMusic",@"targetValue",nil];
        
        settingList=[NSArray arrayWithObjects:array1,array2,nil];
        [settingList retain];
        switchList=[NSMutableArray arrayWithCapacity:settingList.count];
        
        for (int i=0; i<[settingList count]; i++) {
            if ([[[settingList objectAtIndex:i]objectForKey:@"accessoryValue"] compare:@"switch"]==NSOrderedSame) {
                //实例一个UISwitch并注册事件
                UISwitch *myswitch=[[[UISwitch alloc]initWithFrame:CGRectZero]autorelease];
                myswitch.on=[[[settingList objectAtIndex:i]objectForKey:@"prefValue"]boolValue];
                [myswitch addTarget:self action:NSSelectorFromString([[settingList objectAtIndex:i]objectForKey:@"targetValue"]) forControlEvents:UIControlEventValueChanged];
                
                [switchList insertObject:myswitch atIndex:i];
            }else{
                [switchList insertObject:@"" atIndex:i];
            }
        }
        [switchList retain];
        
        //将表格下移
        CGPoint tableCenter=self.view.center;
        self.view.center=CGPointMake(tableCenter.x, tableCenter.y+22);
        self.tabBarItem.badgeValue=[NSString stringWithFormat:@"%d",[settingList count]];
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    
}

#pragma mark --执行操作

-(void)setMusic{
    NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];  //1
    UISwitch *musicSwitch=[switchList objectAtIndex:1];
    [defaults setBool:musicSwitch.on forKey:@"MusicValue"];     //3
    [NSUserDefaults resetStandardUserDefaults];  //4
}

-(void)setSounds{
    NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];
    UISwitch *soundSwitch=[switchList objectAtIndex:0];
    [defaults setBool:soundSwitch.on forKey:@"soundsValue"];
    [NSUserDefaults resetStandardUserDefaults];
    
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return settingList.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    }
    cell.textLabel.text=[[settingList objectAtIndex:indexPath.row]objectForKey:@"titleValue"];
    
    //将视图放入到数组
    if ([switchList objectAtIndex:indexPath.row]) {
        cell.accessoryView=[switchList objectAtIndex:indexPath.row];
    }
    
    return cell;
}


-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section{
    return @"Audio Preferencess";
}

#pragma mark - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
}

@end