Ios 文本字段中的数据未保存

这是我的.h文件

#import <UIKit/UIKit.h>

// for use in xib/storyboard:
#define TAG_TEXT_FIELD 10000
#define CELL_REUSE_IDENTIFIER @"EditableTextCell"

@interface EditableListViewController : UITableViewController

// list data:
@property (nonatomic, copy) NSArray *contents;

// methods for possible overriding:
- (void)contentsDidChange;
- (UITextField *)createTextFieldForCell:(UITableViewCell *)cell;

@end

#导入
//用于xib/故事板：
#定义标记\文本\字段10000
#定义单元格\u重用\u标识符@“EditableTextCell”
@接口EditableListViewController:UITableViewController
//列表数据：
@属性（非原子，副本）NSArray*内容；
//用于可能的重写的方法：
-（无效）内容变更；
-（UITextField*）createTextFieldForCell:（UITableViewCell*）单元格；
@结束

这是我的.m文件

#import "EditableListViewController.h"

static NSString *inactiveTextFieldHint = @"Tap to add item";
static NSString *activeTextFieldHint = @"";
static NSString *returnTappedTextFieldHint = @"~"; // HACK to mark when return was tapped

#pragma mark - Helper Categories

@interface UITextField (ChangeReturnKey)
- (void)changeReturnKey:(UIReturnKeyType)returnKeyType;
@end

@implementation UITextField (ChangeReturnKey)
- (void)changeReturnKey:(UIReturnKeyType)returnKeyType
{
    self.returnKeyType = returnKeyType;
    [self reloadInputViews];
}
@end

#pragma mark - EditableListViewController

@interface EditableListViewController () <UITextFieldDelegate> {
    NSMutableArray *rowsContent;
}
@end

@implementation EditableListViewController

#pragma mark - Contents Assignment

- (NSArray *)contents
{
    return rowsContent;
}

- (void)setContents:(NSArray *)contents
{
    rowsContent = [NSMutableArray arrayWithArray:contents];
    [self.tableView reloadData];
}

#pragma mark - Table Changes

- (void)deleteRow:(NSIndexPath *)indexPath
{
    [rowsContent removeObjectAtIndex:indexPath.row];
    [self.tableView beginUpdates];
    [self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
    [self.tableView endUpdates];
    [self contentsDidChange];
}

- (void)addRow:(NSIndexPath *)indexPath text:(NSString *)text
{
    if (rowsContent == nil) {
        rowsContent = [[NSMutableArray alloc] initWithCapacity:1];
    }
    [rowsContent addObject:text];
    NSIndexPath *nextRow = [NSIndexPath indexPathForRow:indexPath.row+1 inSection:indexPath.section];
    [self.tableView beginUpdates];
    [self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
    [self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:nextRow] withRowAnimation:UITableViewRowAnimationAutomatic];
    [self.tableView endUpdates];
    [self contentsDidChange];
}

- (void)contentsDidChange
{
}

#pragma mark - Table View Data Source

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

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return rowsContent.count + 1; // extra one for inserting new row
}

- (UITextField *)createTextFieldForCell:(UITableViewCell *)cell
{
    CGFloat padding = 8.0f;
    CGRect frame = CGRectInset(cell.contentView.bounds, padding, padding / 2);
    UITextField *textField = [[UITextField alloc] initWithFrame:frame];
    CGFloat spareHeight = cell.contentView.bounds.size.height - textField.font.pointSize;
    frame.origin.y = self.tableView.style == UITableViewStyleGrouped ? spareHeight / 2 : spareHeight - padding/2;
    textField.frame = frame;
    textField.tag = TAG_TEXT_FIELD;
    textField.borderStyle = UITextBorderStyleNone;
    textField.returnKeyType = UIReturnKeyDone;
    textField.autocapitalizationType = UITextAutocapitalizationTypeSentences;
    textField.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleTopMargin;
    return textField;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *reuseIdentifier = CELL_REUSE_IDENTIFIER;
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuseIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseIdentifier];
    }

    UITextField *textField = (UITextField *)[cell viewWithTag:TAG_TEXT_FIELD];
    if (textField == nil) {
        textField = [self createTextFieldForCell:cell];
        [cell.contentView addSubview:textField];
    }
    textField.delegate = self;
    if (indexPath.row < rowsContent.count) {
        textField.text = [rowsContent objectAtIndex:indexPath.row];
        textField.placeholder = nil;
    } else {
        textField.text = nil;
        textField.placeholder = NSLocalizedString(inactiveTextFieldHint, nil);
    }

    return cell;
}

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    switch (editingStyle) {

        case UITableViewCellEditingStyleDelete: {
            [self deleteRow:indexPath];
            break;
        }

        case UITableViewCellEditingStyleInsert: {
            UITableViewCell *sourceCell = [tableView cellForRowAtIndexPath:indexPath];
            UIView *textField = [sourceCell viewWithTag:TAG_TEXT_FIELD];
            [textField becomeFirstResponder];
            break;
        }

        case UITableViewCellEditingStyleNone:
            break;
    }
}

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
    return (indexPath.section == 0);
}

- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
    return indexPath.section == 0 && indexPath.row < rowsContent.count;
}

- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
    NSString *rowContent = [rowsContent objectAtIndex:fromIndexPath.row];
    [rowsContent removeObjectAtIndex:fromIndexPath.row];
    [rowsContent insertObject:rowContent atIndex:toIndexPath.row];
    [self contentsDidChange];
}

#pragma mark - Table View Delegate

- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (indexPath.section != 0) return UITableViewCellEditingStyleNone;
    return indexPath.row < rowsContent.count ? UITableViewCellEditingStyleDelete : UITableViewCellEditingStyleInsert;
}

- (NSIndexPath *)tableView:(UITableView *)tableView
    targetIndexPathForMoveFromRowAtIndexPath:(NSIndexPath *)sourceIndexPath
    toProposedIndexPath:(NSIndexPath *)proposedDestinationIndexPath
{
    return proposedDestinationIndexPath.section == 0 && proposedDestinationIndexPath.row < rowsContent.count
        ? proposedDestinationIndexPath
        : [NSIndexPath indexPathForRow:rowsContent.count-1 inSection:0];
}

#pragma mark - UITextFieldDelegate

- (NSIndexPath *)cellIndexPathForField:(UITextField *)textField
{
    UITableViewCell *parentCell = (UITableViewCell *)[[textField superview] superview];
    return [self.tableView indexPathForCell:parentCell];
}

- (NSUInteger)rowIndexForField:(UITextField *)textField
{
    return [self cellIndexPathForField:textField].row;
}

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    if ([textField.text length] == 0) {
        textField.placeholder = NSLocalizedString(activeTextFieldHint, nil);
    }
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    textField.placeholder = returnTappedTextFieldHint;
    [textField resignFirstResponder];
    return YES;
}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    if (textField.text.length == 0) {
        // if it's the last field, change the return key to "Next"
        if ([self rowIndexForField:textField] == rowsContent.count) {
            [textField changeReturnKey:UIReturnKeyNext];
        }
    }
    else {
        // if return button is "Next" and field is about to be empty, change to "Done"
        if (textField.returnKeyType == UIReturnKeyNext && string.length == 0 && range.length == textField.text.length) {
            [textField changeReturnKey:UIReturnKeyDone];
        }
    }

    return YES;
}

- (BOOL)textFieldShouldClear:(UITextField *)textField
{
    if (textField.returnKeyType == UIReturnKeyNext) {
        [textField changeReturnKey:UIReturnKeyDone];
    }

    return YES;
}

- (void)textFieldDidEndEditing:(UITextField *)textField
{
    NSIndexPath *currRow = [self cellIndexPathForField:textField];
    NSUInteger cellIndex = currRow.row;
    if (cellIndex < rowsContent.count) {
        if ([textField.text length]) {
            if (![textField.text isEqualToString:[rowsContent objectAtIndex:cellIndex]]) {
                [rowsContent replaceObjectAtIndex:cellIndex withObject:textField.text];
                [self contentsDidChange];
            }
        }
        else {
            [self deleteRow:currRow];
        }
    }
    else { // new row
        if ([textField.text length]) {
            [self addRow:currRow text:textField.text];
            [textField changeReturnKey:UIReturnKeyDone];
            if ([textField.placeholder isEqual:returnTappedTextFieldHint]) { // if tapped return, go to the next field
                UITableViewCell *nextCell = [self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:cellIndex+1 inSection:currRow.section]];
                UIView *nextTextField = [nextCell viewWithTag:TAG_TEXT_FIELD];
                [nextTextField becomeFirstResponder];
            }
        }
        else {
            textField.placeholder = NSLocalizedString(inactiveTextFieldHint, nil);
        }
    }
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.navigationItem.rightBarButtonItem = self.editButtonItem;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

@end

#导入“EditableListViewController.h”
静态NSString*inactiveTextFieldHint=@“点击添加项”；
静态NSString*activeTextFieldHint=@；
静态NSString*returnTappedTextFieldHint=@“~”；//点击回车键时点击标记
#pragma标记-辅助对象类别
@接口UITextField（ChangeReturnKey）
-（void）changeReturnKey:（UIReturnKeyType）returnKeyType；
@结束
@实现UITextField（ChangeReturnKey）
-（无效）changeReturnKey:（UIReturnKeyType）returnKeyType
{
self.returnKeyType=returnKeyType；
[自重新加载输入视图]；
}
@结束
#pragma标记-EditableListViewController
@接口EditableListViewController（）{
NSMutableArray*行内容；
}
@结束
@可编辑ListViewController的实现
#pragma标记-内容分配
-（NSArray*）目录
{
返回行内容；
}
-（void）setContents:（NSArray*）contents
{
rowsContent=[NSMUTABLEARRY arrayWithArray:contents]；
[self.tableView重载数据]；
}
#pragma标记-表更改
-（void）deleteRow:（NSIndexPath*）indexPath
{
[rowsContent removeObjectAtIndex:indexath.row]；
[self.tableView开始更新]；
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]with RowAnimation:UITableViewRowAnimationAutomatic]；
[self.tableView endUpdates]；
[自我满足改变]；
}
-（void）addRow:（NSIndexPath*）indexPath文本：（NSString*）文本
{
如果（行内容==nil）{
rowsContent=[[NSMutableArray alloc]initWithCapacity:1]；
}
[行内容添加对象：文本]；
nsindepath*nextRow=[nsindepath indexPathForRow:indepath.row+1第1节：indepath.section]；
[self.tableView开始更新]；
[self.tableView重新加载rowsatindexpaths:[NSArray arrayWithObject:indexath]withRowAnimation:UITableViewRowAnimationAutomatic]；
[self.tableView insertRowsAtIndexPaths:[NSArray arraywhithobject:nextRow]带行动画：uitableview行动画自动]；
[self.tableView endUpdates]；
[自我满足改变]；
}
-（无效）内容IDChange
{
}
#pragma标记-表视图数据源
-（NSInteger）表格视图中的节数：（UITableView*）表格视图
{
返回1；
}
-（NSInteger）表视图：（UITableView*）表视图行数节：（NSInteger）节
{
return rowsContent.count+1；//插入新行需要额外一个
}
-（UITextField*）createTextFieldForCell:（UITableViewCell*）单元格
{
CGFloat填充=8.0f；
CGRect frame=CGRectInset（cell.contentView.bounds，padding，padding/2）；
UITextField*textField=[[UITextField alloc]initWithFrame:frame]；
CGFloat spareHeight=cell.contentView.bounds.size.height-textField.font.pointSize；
frame.origin.y=self.tableView.style==UITableViewStyleGrouped？spareHeight/2:spareHeight-padding/2；
textField.frame=frame；
textField.tag=标记\文本\字段；
textField.borderStyle=UITextBorderStyleNone；
textField.returnKeyType=UIReturnKeyDone；
textField.autocapitalizationType=uitextAutocapitalizationtype句；
textField.autoresizingMask=UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleTopMargin；
返回文本字段；
}
-（UITableViewCell*）tableView:（UITableView*）tableView cellForRowAtIndexPath:（NSIndexPath*）indexPath
{
静态NSString*reuseIdentifier=单元格\u重用\u标识符；
UITableViewCell*单元格=[tableView dequeueReusableCellWithIdentifier:reuseIdentifier]；
如果（单元格==nil）{
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseIdentifier]；
}
UITextField*textField=（UITextField*）[带标记的单元格视图：标记\文本\字段]；
如果（textField==nil）{
textField=[self-createTextFieldForCell:cell]；
[cell.contentView addSubview:textField]；
}
textField.delegate=self；
if（indexPath.rowSaving

NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

// saving an NSString
 [prefs setObject:@"TextToSave" forKey:@"keyToLookupString"];

// saving an NSInteger
 [prefs setInteger:42 forKey:@"integerKey"];

// saving a Double
 [prefs setDouble:3.1415 forKey:@"doubleKey"];

// saving a Float
 [prefs setFloat:1.2345678 forKey:@"floatKey"];

// This is suggested to synch prefs.


 [prefs synchronize];///////Very Important. This SAVES THE NEWLY ADDED INTO NSUserDefaults


Retrieving

NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

// getting an NSString
 NSString *myString = [prefs stringForKey:@"keyToLookupString"];

// getting an NSInteger
 NSInteger myInt = [prefs integerForKey:@"integerKey"];

// getting an Float
 float myFloat = [prefs floatForKey:@"floatKey"];

[[NSUserDefaults standardUserDefaults] boolForKey:@"yourKey"] // returns bool

if(![[NSUserDefaults standardUserDefaults] objectForKey:@"yourKey"])
{
//no object present. Set the object.
}
else
{
//retrieve the object and do what u wish 
}