本文介绍了保存 UITableView 数据?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在使用故事板和动态 UITableView 添加我的单元格，如下所示.我需要知道如何将此文本保存在每个单元格的 UITextField 以及 UISwitch 状态等中，因此当我上下滚动时，数据不会丢失.此外，当应用程序关闭时，我需要它显示重新打开时输入的数据.我对编程很陌生，这是我的第一个 UItableView 项目.编码示例会很棒，请提供尽可能详细的信息！提前致谢！
I am using storyboards and a dynamic UITableView adding my cells like below. I need to know how I can save this text in the UITextField in each cell as well as UISwitch state etc so when I scroll up and down, the data is not lost. Also when the app closes, I need it to show the data entered when reopening. I am pretty new to programming, and this is my first UItableView project. Coding examples would be great, please give as much detail as possible! thank you in advance!
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
// Make cell unselectable and set font.
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.textLabel.font = [UIFont fontWithName:@"ArialMT" size:13];
if (indexPath.section == 0) {
UITextField* tf = nil;
switch ( indexPath.row ) {
case 0: {
cell.textLabel.text = @"Name" ;
tf = nameFieldTextField = [self makeTextField:self.name placeholder:@"John Appleseed"];
nameFieldTextField.tag = 1;
[cell addSubview:nameFieldTextField];
break ;
}
case 1: {
cell.textLabel.text = @"Address" ;
tf = addressFieldTextField = [self makeTextField:self.address placeholder:@"Street Address"];
addressFieldTextField.keyboardType = UIKeyboardTypeNumbersAndPunctuation;
[cell addSubview:addressFieldTextField];
break ;
}
case 2: {
cell.textLabel.text = @"Email" ;
tf = emailFieldTextField = [self makeTextField:self.email placeholder:@"[email protected]"];
emailFieldTextField.keyboardType = UIKeyboardTypeEmailAddress;
[cell addSubview:emailFieldTextField];
break ;
}
case 3: {
cell.textLabel.text = @"Phone" ;
tf = phoneFieldTextField = [self makeTextField:self.phone placeholder:@"xxx-xxx-xxxx"];
phoneFieldTextField.keyboardType = UIKeyboardTypePhonePad;
phoneFieldTextField.tag = 10;
phoneFieldTextField.text = [self formatPhoneNumber:phoneFieldTextField.text deleteLastChar:YES];
[cell addSubview:phoneFieldTextField];
break ;
}
case 4: {
cell.textLabel.text = @"DOB" ;
tf = dateOfBirthTextField = [self makeTextField:self.dateOfBirth placeholder:@"xx/xx/xxxx"];
dateOfBirthTextField.keyboardType = UIKeyboardTypeNumbersAndPunctuation;
[cell addSubview:dateOfBirthTextField];
break ;
}
}
// Textfield dimensions
tf.frame = CGRectMake(120, 12, 170, 30);
// Workaround to dismiss keyboard when Done/Return is tapped
[tf addTarget:self action:@selector(textFieldFinished:) forControlEvents:UIControlEventEditingDidEndOnExit];
推荐答案
我认为你可以制作一个模型对象来存储数据.
I think you can make a model object for storing the data.
.h 文件
@interface User : NSObject <NSCoding>
@property (nonatomic, copy) NSString *name;
@property (nonatomic, copy) NSString *address;
@property (nonatomic, copy) NSString *email;
@property (nonatomic, copy) NSString *phone;
@property (nonatomic, copy) NSString *dob;
- (void)save;
+(User *)savedUser;
.m 文件
#define kName @"Name"
#define kAddress @"Address"
#define kEMail @"EMail"
#define kPhone @"Phone"
#define kDOB @"DOB"
#define kSavedUser @"SavedUser"
@implementation User
- (void)encodeWithCoder:(NSCoder *)encoder{
[encoder encodeObject:self.name forKey:kName];
[encoder encodeObject:self.address forKey:kAddress];
[encoder encodeObject:self.email forKey:kEMail];
[encoder encodeObject:self.phone forKey:kPhone];
[encoder encodeObject:self.dob forKey:kDOB];
}
- (id)initWithCoder:(NSCoder *)decoder{
self = [super init];
if (self) {
self.name = [decoder decodeObjectForKey:kName];
self.address = [decoder decodeObjectForKey:kAddress];
self.email = [decoder decodeObjectForKey:kEMail];
self.phone = [decoder decodeObjectForKey:kPhone];
self.dob = [decoder decodeObjectForKey:kDOB];
}
return self;
}
#pragma mark - Save
- (void)save{
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:self];
[defaults setObject:data forKey:kSavedUser];
[defaults synchronize];
}
+(User *)savedUser{
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSData *data = [defaults objectForKey:kSavedUser];
return [NSKeyedUnarchiver unarchiveObjectWithData:data];
}
UITableView 数据源
UITableView DataSource
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:kCellIdentifier
forIndexPath:indexPath];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.detailTextField.delegate = self;
[cell.detailTextField setTag:indexPath.row+1];
switch (indexPath.row+1) {
case 1:{
cell.titleLabel.text = @"Name";
cell.detailTextField.text = self.user.name;
break;
}
case 2:{
cell.titleLabel.text = @"Address";
cell.detailTextField.text = self.user.address;
break;
}
case 3:{
cell.titleLabel.text = @"EMail";
cell.detailTextField.text = self.user.email;
break;
}
case 4:{
cell.titleLabel.text = @"Phone";
cell.detailTextField.text = self.user.phone;
break;
}
case 5:{
cell.titleLabel.text = @"D.O.B.";
cell.detailTextField.text = self.user.dob;
break;
}
default:
break;
}
return cell;
}
解释的太多了.我附上了源代码，看看吧.源代码
It's too much to explain. I have attached source code, take a look. Source Code
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