到目前为止，我已在UITableView中使用按钮添加新单元格HabitViewControlle。轻敲单元格时，会显示detialViewController。在此视图中，他们是textField，在点击时会启动UIPicker。我想将tableViewCell的标题设置为选择器选择..我已将string设为cellName，我可以将其发送给其他ViewController。我也这样做了，当picker被更改时，我将字符串cellName设置为我想要选择选择器选择时单元格的标题。所以我几乎准备好了，除了在设置cellName时将单元格标题设置为字符串，并且选择器选择已更改。如果这没有意义，请发表评论，我会尽力帮助，因为我很难将问题写成文字
#import <UIKit/UIKit.h>
#import "DetailViewController.h"
@interface HabitViewController : UITableViewController <DetailViewDelegate> {
UITableViewCell *cell;
}
@end
#import "HabitViewController.h"
#import "DetailViewController.h"
@interface HabitViewController () {
NSMutableArray *_objects;
}
@property(strong, nonatomic) NSString *cellName2;
@end
@implementation HabitViewController
- (void)awakeFromNib
{
[super awakeFromNib];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.navigationItem.leftBarButtonItem = self.editButtonItem;
[self.editButtonItem setTintColor:[UIColor colorWithRed:.33 green:.33 blue:.33 alpha:1]];
UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(insertNewObject:)];
self.navigationItem.rightBarButtonItem = addButton;
addButton.tintColor = [UIColor colorWithRed:.33 green:.33 blue:.33 alpha:1];
[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"nav_bar.png"] forBarMetrics:UIBarMetricsDefault];
//if ([cellName isEqualToString:@"Hello World"]) {
// }
}
- (void)viewDidAppear:(BOOL)animated {
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)insertNewObject:(id)sender
{
if (!_objects) {
_objects = [[NSMutableArray alloc] init];
}
[_objects insertObject:[NSDate date] atIndex:0];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}
#pragma mark - Table View
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return _objects.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
NSDate *object = _objects[indexPath.row];
cell.textLabel.text = [object description];
cell.textLabel.text = @"New Habit";
NSLog(@"%@",self.cellName2);
return cell;
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
[_objects removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
} else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
}
}
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the item to be re-orderable.
return YES;
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if([segue.identifier isEqualToString:@"showDetail"]) {
/* assigning self as delegate, telling the detail view that I implement
* setCellName2:, so it (the detailVC) can call it whenever it wants to.
*/
[segue.destinationViewController setDelegate:self];
}
}
#pragma mark - DetailViewDelegate
// note: this is just a property setter so this is not actually needed
- (void)setCellName2:(NSString *)cellName {
cellName = cellName;
NSLog(@"%@",cellName);
cell.textLabel.text = cellName;
}
@end
#import <UIKit/UIKit.h>
@protocol DetailViewDelegate <NSObject>
- (void)setCellName2:(NSString *)cellName;
@end
@interface DetailViewController : UIViewController<UIPickerViewDelegate> {
NSArray *PickerData;
}
@property (weak, nonatomic) IBOutlet UITextField *habitField;
@property (weak, nonatomic) id<DetailViewDelegate> delegate;
@property (nonatomic, strong) NSString *cellName;
@property (retain, nonatomic) NSArray *PickerData;
@property (weak, nonatomic) IBOutlet UIBarButtonItem *doneButton;
- (IBAction)backToRoot:(id)sender;
@end
#import "DetailViewController.h"
#import "HabitViewController.h"
@interface DetailViewController () {
UITableViewCell *_cell;
}
@end
@implementation DetailViewController
@synthesize PickerData;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSArray *array = [[NSArray alloc] initWithObjects:@"Posture",@"Paludies Abbs",@"Custom", nil];
self.PickerData = array;
[self.delegate setCellName2:self.cellName];
UIToolbar *toolBar = [[UIToolbar alloc] init];
toolBar.barStyle = UIBarStyleBlackOpaque;
[toolBar sizeToFit];
[toolBar setBackgroundImage:[UIImage imageNamed:@"red_navigation_bar.png"] forToolbarPosition:UIToolbarPositionAny barMetrics:UIBarMetricsDefault];
UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
target:self
action:nil];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone
target:self
action:@selector(releasePicker)];
UIPickerView *Picker = [[UIPickerView alloc] init];
Picker.showsSelectionIndicator = YES;
Picker.delegate = self;
doneButton.image = [UIImage imageNamed:@"button.png"];
[toolBar setItems:@[flexSpace, doneButton] animated:YES];
self.habitField.inputAccessoryView = toolBar;
[self.habitField setInputView:Picker];
}
- (void)releasePicker {
[self.habitField resignFirstResponder];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)backToRoot:(id)sender {
[self.navigationController popToRootViewControllerAnimated:YES];
}
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
return 1;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
return [PickerData count];
}
-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
return [self.PickerData objectAtIndex:row];
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
int select = row;
if (select == 0) {
self.cellName = @"Posture";
[self.view reloadInputViews];
NSLog(@"%@ Is Selected", self.cellName);
}
}
@end
答案 0 :(得分：1)
我认为你想使用你的委托在didSelectRow方法中设置你的选择器。像这样：
DetailViewController.m：
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
int select = row;
if (select == 0) {
self.cellName = @"Posture";
[self.delegate setCellName2:self.cellName];
NSLog(@"%@ Is Selected", self.cellName);
}
}
然后回到你的habitViewController：
- (void)setCellName2:(NSString *)cellName {
cellName = cellName;
NSLog(@"%@",cellName);
selectedCell.textLabel.text = cellName;
[self.tableView reloadData];
}
“细胞”也存在一些问题。假设你有很多行，这将被反复使用，并且将始终包含它显示的最后一个单元格，这很少是你期望的。
我会将其重命名为selectedCell，并在触摸单元格并触发其他视图时设置它。
@interface HabitViewController : UITableViewController <DetailViewDelegate> {
UITableViewCell *savedCell;
}
我会在这里设置：
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if([segue.identifier isEqualToString:@"showDetail"]) {
if ([sender isKindOfClass[UITableViewCell class]]) {
savedCell = (UITableViewCell *)sender;
}
/* assigning self as delegate, telling the detail view that I implement
* setCellName2:, so it (the detailVC) can call it whenever it wants to.
*/
[segue.destinationViewController setDelegate:self];
}
}
我只想在这个方法中使用临时单元格：
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
NSDate *object = _objects[indexPath.row];
cell.textLabel.text = [object description];
cell.textLabel.text = @"New Habit";
NSLog(@"%@",self.cellName2);
return cell;
}
答案 1 :(得分：0)
我用这个
修复了它首先在您的habitViewController.h中执行以下操作：
#import <UIKit/UIKit.h>
#import "DetailViewController.h"
@interface HabitViewController : UITableViewController <DetailViewDelegate> {
UITableViewCell *cell;
}
@property (nonatomic, strong) NSString *cellNameSender;
@end
然后在你的.m中用以下内容替换看起来像这样的代码：
- (void)setCellName2:(NSString *)cellName {
cellName = cellName;
NSLog(@"%@",cellName);
self.cellNameSender = cellName;
}
@end
与此相同
- (void)viewDidAppear:(BOOL)animated {
cell.textLabel.text = self.cellNameSender;
}
现在tableViewCell应该显示姿势是选择的姿势。