#import "ViewController.h"#define USERNAME @"nameTextField"#define PASSWORD @"pswTextField"@implementation ViewController@synthesize recordBtn;@synthesize cellRightArray;- (void)didReceiveMemoryWarning{    [super didReceiveMemoryWarning];}#pragma mark - View lifecycle- (void)viewDidLoad{    [super viewDidLoad];    cellRightArray = [[NSMutableArray alloc]init];//作为属性变量的数组如果不初始化是不能用的，这个数组用来保存UITextFiled中的用户名和密码。    recordPwd = NO;//刚开始把是否保存密码设置为NO    UITableView *table = [[UITableView alloc]initWithFrame:CGRectMake(10, 20, 300, 100) style:UITableViewStyleGrouped];    table.delegate = self;    table.dataSource = self;    table.backgroundColor = [UIColor whiteColor];        [self.view setBackgroundColor:[UIColor whiteColor]];    recordBtn = [[UIImageView alloc]init];//这个就是那个带钩的小框框，之前尝试用UIButton，但是不好切换button的backgroundView，所以就换了UIImageView,给它添加手势。    recordBtn.frame = CGRectMake(180, 130, 40, 40);    recordBtn.userInteractionEnabled = YES;    UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(110, 130, 100, 40)];    label.text = @"记住密码";    [self.view addSubview:label];    [label release];        UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(recoredBtnClick)];//添加了一个手势，单击触发事件    tapGesture.numberOfTapsRequired = 1;//点击一下    [recordBtn addGestureRecognizer:tapGesture];这里注意是在UIImageView上添加手势    [self readUserInfoFromFile];//在图片初始化之前先读取plist文件，判断recordPwd        if (recordPwd) {        recordBtn.image = [UIImage imageNamed:@"check_on@2x.png"];    }    else{        recordBtn.image = [UIImage imageNamed:@"check_off@2x.png"];    }    [self.view addSubview:table];    [self.view addSubview:recordBtn];    [tapGesture release];    [table release];    }- (void)viewDidUnload{    [super viewDidUnload];    self.recordBtn = nil;    self.cellRightArray = nil;}- (void)readUserInfoFromFile//从plist读取数据{    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);    NSString *documentsDirectory = [paths objectAtIndex:0];    NSString *path = [documentsDirectory stringByAppendingPathComponent:@"data.plist"];
//以上的三句话获取沙盒中data.plist的路径。    NSLog(@"文件路径：%@",path);    NSMutableDictionary *saveStock = [[NSMutableDictionary alloc]initWithContentsOfFile:path];//从该路径读取文件，注意这里是读取，跟创建plist的init方法不同，看下面就知道了    recordPwd = [[saveStock objectForKey:@"recordPwd"]boolValue];//@"recordPwd"是一个key，存到字典何从字典中取值都要用到    if (!recordPwd)    {        nameTextField.text = @"";        pswTextField.text = @"";        [saveStock removeAllObjects];//移除字典内所有元素    }    else{        nameTextField.text = [saveStock objectForKey:USERNAME];        pswTextField.text = [saveStock objectForKey:PASSWORD];        [pswTextField setSecureTextEntry:YES];//密码设置为暗文    }        NSLog(@"nameTextField.text==%@,pswTextField.text=%@",nameTextField.text,pswTextField.text);    NSLog(@"读取saveStock=%@",saveStock);    [saveStock release];}//把是否记住密码信息写进data.plist文件- (void)writePasswordToFile{    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);    NSString *documentsDirectory = [paths objectAtIndex:0];    NSString *path = [documentsDirectory stringByAppendingPathComponent:@"data.plist"];    NSLog(@"filePath:%@",path);    NSMutableDictionary *data = http://www.mamicode.com/[[NSMutableDictionary alloc]init];//字典初始化，注意这里的init方法，跟-(void)readUserInfoFromFile方法中的字典初始化方法不同。
    NSLog(@"self.cellRightArray=%@",self.cellRightArray);    if (nameTextField.text.length != 0||pswTextField.text.length != 0) {//如果输入不为空        [data setObject:nameTextField.text forKey:USERNAME];//用户名和密码存入字典，这里的key用了宏定义，其实@"recordPwd"也可以用，在文中多次使用比较省事        [data setObject:pswTextField.text forKey:PASSWORD];    }    [data setObject:[NSNumber numberWithBool:recordPwd] forKey:@"recordPwd"];    [data writeToFile:path atomically:YES];    NSLog(@"是否记住密码信息==%@",data);    [data release];}- (void)recoredBtnClick//点击是否记住密码{    UIImage *image = [[UIImage alloc]init];    if (recordPwd) {        recordBtn.image = [UIImage imageNamed:@"check_off@2x.png"];        recordPwd = NO;    }    else{        recordBtn.image = [UIImage imageNamed:@"check_on@2x.png"];        recordPwd = YES;    }    [self writePasswordToFile];    [image release];}#pragma mark -tableView代理方法实现-- (UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    NSArray *left = [NSArray arrayWithObjects:@"姓名:",@"密码:", nil];    NSArray *right = [NSArray arrayWithObjects:@"请输入用户名",@"请输入密码", nil];    static NSString *cellIdentifier = @"cell";    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];    if (cell == nil) {        cell = [[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]autorelease];        cell.selectionStyle = UITableViewCellSelectionStyleNone;        UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(10, 8, 80, 30)];        label.text = [NSString stringWithFormat:[left objectAtIndex:indexPath.row]];        label.backgroundColor = [UIColor clearColor];        [cell.contentView addSubview:label];        [label release];        if (indexPath.row == 0 ){            nameTextField = [[[UITextField alloc]initWithFrame:CGRectMake(90, 10, 140, 30)]autorelease];            nameTextField.placeholder = [NSString stringWithFormat:[right objectAtIndex:indexPath.row]];            nameTextField.delegate = self;            [cell.contentView addSubview:nameTextField];        }else{            pswTextField = [[[UITextField alloc]initWithFrame:CGRectMake(90, 10, 140, 30)]autorelease];            pswTextField.placeholder = [NSString stringWithFormat:[right objectAtIndex:indexPath.row]];            pswTextField.delegate = self;            [pswTextField setSecureTextEntry:YES];            [cell.contentView addSubview:pswTextField];//本人智商不够，所以才去这种笨写法，不知道有没高手能用循环创建来写？            [self readUserInfoFromFile];//还要再读取一次，如果注销会发生什么？大家可以去试试        }    }    return cell;}- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{    return 2;}- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event//点击空白处隐藏键盘{    [nameTextField resignFirstResponder];    [pswTextField resignFirstResponder];}- (void)viewWillAppear:(BOOL)animated{    [super viewWillAppear:animated];}- (void)viewDidAppear:(BOOL)animated{    [super viewDidAppear:animated];}- (void)viewWillDisappear:(BOOL)animated{    [super viewWillDisappear:animated];}- (void)viewDidDisappear:(BOOL)animated{    [super viewDidDisappear:animated];}- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{    // Return YES for supported orientations    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);}- (void)dealloc {    [cellRightArray release];    [nameTextField release];    [pswTextField release];    [recordBtn release];    [super dealloc];}@end

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