我一直在编写一个具有自定义协议的应用程序，用于将数据从子视图发送到父视图，这些类是
自定义协议在DaysViewController中声明，并在AddViewController中实现
AddViewController.h
#import <UIKit/UIKit.h>
#import "DaysViewController.h"
#import "Course.h"
#import "Student.h"
@interface AddViewController : UITableViewController<UIActionSheetDelegate,UIPickerViewDelegate,UIPickerViewDataSource,UIPickerViewAccessibilityDelegate,UITextFieldDelegate,DaysViewControllerDelegate>
{
NSArray *hoursarray;
UIActionSheet *aac;
IBOutlet UITextField *NameTx,*HoursTx,*DaysTx,*TimeTx;
Student *st;
Course *cc;
}
-(void) pickerDoneClick;
-(IBAction)fillTheOtherData;
@property (nonatomic ,strong) UIActionSheet *aac;
@end
AddViewController.m
#import "AddViewController.h"
@interface AddViewController ()
@end
@implementation AddViewController
@synthesize aac;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
//viewP.frame = CGRectMake(0, 154, 320, 205);
hoursarray = [[NSArray alloc]initWithObjects:@"2",@"3",@"4", nil];
[self.tableView setScrollEnabled:NO];
[DaysTx setEnabled:NO];
[TimeTx setEnabled:NO];
[HoursTx setKeyboardType:UIKeyboardTypeDecimalPad];
cc = [[Course alloc]init];
//UITapGestureRecognizer *tapgr = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapped:)];
//[self.view addGestureRecognizer:tapgr];
}
-(void)tapped:(UITapGestureRecognizer *)tap
{
[self.view endEditing:YES];
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];
return YES;
}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
return [hoursarray count];
}
//-(IBAction)addCourse
//{
// [UIView beginAnimations:@"view" context:nil];
// [UIView setAnimationDuration:1];
// viewP.frame = CGRectMake(0, 500, 320, 205);
// [UIView commitAnimations];
//
//}
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 1;
}
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
return [hoursarray objectAtIndex:row];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row == 3)
{
aac = [[UIActionSheet alloc]initWithTitle:@"How many ?" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil, nil];
UIPickerView *picker = [[UIPickerView alloc]initWithFrame:CGRectMake(0, 44, 0, 0)];
picker.delegate = self;
picker.dataSource = self;
UIToolbar *pickerToolBar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 44)];
[pickerToolBar sizeToFit];
NSMutableArray *barItems = [[NSMutableArray alloc]init];
UIBarButtonItem *flexspace = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
[barItems addObject:flexspace];
UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(pickerDoneClick)];
[barItems addObject:doneBtn];
[pickerToolBar setItems:barItems animated:YES];
[aac addSubview:pickerToolBar];
[aac addSubview:picker];
[aac showInView:self.view];
[aac setBounds:CGRectMake(0, 0, 320, 464)];
}
else if (indexPath.row == 2)
{
DaysViewController *days = [self.storyboard instantiateViewControllerWithIdentifier:@"Days"];
days.delegate = self;
[self.navigationController pushViewController:days animated:YES];
}
}
-(void) pickerDoneClick
{
[aac dismissWithClickedButtonIndex:0 animated:YES];
}
-(void)chooseDays:(DaysViewController *)controller withArray:(NSArray *)theDaysArray
{
NSLog(@"I'm @ chooseDays method");
NSLog(@"Before the add !!");
NSLog(@"chooseDays Method and the array is %@",theDaysArray);
cc.days = [NSMutableArray arrayWithObject:theDaysArray];
NSLog(@"After the add");
NSLog(@"chooseDays Method and the array is %@",cc.days);
// [self dismissViewControllerAnimated:YES completion:nil];
}
-(void)cancelChooseDays:(DaysViewController *)controller
{
[self dismissViewControllerAnimated:YES completion:nil];
}
-(IBAction)fillTheOtherData
{
cc.name = NameTx.text;
cc.hour = [HoursTx.text integerValue];
NSLog(@"The name is %@ and the hour credit is %d",cc.name,cc.hour);
}
@end
DaysViewController.h
#import <UIKit/UIKit.h>
#import "Course.h"
@class DaysViewController;
@protocol DaysViewControllerDelegate <NSObject>
@required
-(void)chooseDays:(DaysViewController *)controller withArray:(NSArray *)theDaysArray;
-(void)cancelChooseDays:(DaysViewController *)controller;
@end
@interface DaysViewController : UITableViewController
{
Course *courseDays;
NSArray *days;
NSMutableArray *dayChosen;
}
@property (nonatomic,weak) id<DaysViewControllerDelegate> delegate;
-(IBAction)done:(id)sender;
-(IBAction)cancel:(id)sender;
@end
DaysViewController.m
#import "DaysViewController.h"
@interface DaysViewController ()
@end
@implementation DaysViewController
@synthesize delegate;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
days = [[NSArray alloc]initWithObjects:@"Saturday",@"Sunday",@"Monday",@"Teusday",@"Wednesday",@"Thursday",@"Friday", nil];
dayChosen = [[NSMutableArray alloc]init];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
#warning Potentially incomplete method implementation.
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
#warning Incomplete method implementation.
// Return the number of rows in the section.
return [days count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"DaysCell"];
if (cell == nil) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"DaysCell"];
}
cell.textLabel.text = [days objectAtIndex:indexPath.row];
return cell;
}
-(IBAction)done:(id)sender
{
//Course *course = [[Course alloc]init];
//[course.days addObject:dayChosen];
//NSArray *daysArray = [NSArray arrayWithObject:dayChosen];
NSLog(@"The Days are %@",dayChosen);
[self.delegate chooseDays:self withArray:dayChosen];
[self dismissViewControllerAnimated:YES completion:nil];
}
-(IBAction)cancel:(id)sender
{
[self.delegate cancelChooseDays:self];
}
/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
*/
/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[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;
}
*/
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
cell.accessoryType = UITableViewCellAccessoryCheckmark;
[dayChosen addObject:[days objectAtIndex:indexPath.row]];
NSLog(@"Days are %@",dayChosen);
}
@end
MainViewController有一个按钮，带我到AddViewController，AddViewController有相同的按钮，带我到DaysViewController，所有的视图都有一个UITableView。
我想要做的是当我将数据从DaysViewController发送到AddViewController以将其放入数组并关闭AddViewController应该显示的视图，而不是MainViewController显示，这是我不想要的。
AddViewController和DaysViewController有一个UINavigationController，但MainViewController没有。
提前谢谢。
答案 0 :(得分：1)
好的，我想我知道你的问题是什么。在cancel函数中，尝试切换以下代码行：
[self dismissViewControllerAnimated:YES completion:nil];
使用以下代码：
[self.navigationController popViewControllerAnimated:YES];
如果有帮助，请告诉我。