Question

我知道之前已经问过这个问题，但答案不明确

问题是UITableview正在使用viewDidLoad方法中的数据其中NSMuatableArray已分配并初始化但包含void。但是在textFieldDidEndEditing的textfield方法中，NSMutableArray确实包含textField中的文本。

我有一个viewController，texField和tableview存在于其中，dataSource设置为相同的viewController。 问题是如何将该值传递给UITableView

viewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UITableViewDataSource>

@property (weak, nonatomic) IBOutlet UITextField *TextField;
@property NSString *content;
@property (nonatomic, strong) NSMutableArray *textFieldArray;

@end

viewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController


-(BOOL)textFieldShouldReturn:(UITextField *) textField{
    self.content = [textField text];
    NSLog(@"content is %@", self.content);
    [textField resignFirstResponder];
    return YES;
}


-(bool)textFieldDidEndEditing:(UITextField *) textField {

    [self.textFieldArray addObject:self.content];
    [textField setText:@""];
    NSLog(@"Array inside field did end editing is %@", self.textFieldArray);
    return YES;
}



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


-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {


    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];

    cell.textLabel.text = self.textFieldArray[indexPath.row];
    return cell;
}



- (void)viewDidLoad {
    [super viewDidLoad];
    self.textFieldArray = [[NSMutableArray alloc]initWithObjects:@"add more task", nil];




    NSLog(@"box in viewDidLoad ris %@", self.textFieldArray);

    // Do any additional setup after loading the view, typically from a nib.
}

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

@end

Answer 1

在从textfield获取文本后的textFieldDidEndEditing:方法中重新加载表视图，以便反映新值。这样做：

[self.textFieldArray addObject:self.content];
[textField setText:@""];

// Your code is missing the following line
[tableView reloadData]; // tableView is instance of your table view

NSLog(@"Array inside field did end editing is %@", self.textFieldArray);
return YES;

Answer 2

-(bool)textFieldDidEndEditing:(UITextField *) textField {

    [self.textFieldArray addObject:self.content];
    [textField setText:@""];
    [tableView reloadData]; //Reload tableview
    return YES;
}

在textFieldDidEndEditing委托

中调用tableview重新加载

Answer 3

Vivek的答案非常好，除了你不需要重新加载表，除非它真的有必要（额外的处理时间和所有你知道的），所以不要重新加载整个表你可以只添加一行，如下所示：

- (void) textFieldDidEndEditing:(UITextField *)textField {
    [_tableDSArray addObject:textField.text];
    [self.tableView insertRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:tableDSArray.count-1 inSection:0]] withRowAnimation:UITableViewRowAnimationLeft];
}

Answer 4

    -(bool)textFieldDidEndEditing:(UITextField *) textField {
    [self.textFieldArray addObject:self.content];
    [textField setText:@""];
    [tableView setdelegate:nil];
    [tableView setdatasource:nil];
    [tableView setdelegate:self];
    [tableView setdatasource:self];
    [tableView reloadData];
    NSLog(@"Updated With Entered Text:\n%@",self.textFieldArray); 
    return YES;
    }

如何从UITextField加载文本，并在每次文本字段返回文本时在UITableView中显示它

4 个答案: