【发布时间】：2012-11-15 07:13:31
【问题描述】：
我在尝试让表格视图在我的 iPhone 上工作时遇到了很多麻烦。奇怪的是，它在我的 iOS 模拟器上似乎工作得很好（即，我可以向数组添加一个条目，并且该条目显示在我的表格视图中）。但是，当我尝试在使用我的 iOS 设备时添加条目时，代码会在 dequeueReusableCellWithIdentifier: 行上中断。我检查了大小写不一致，名称不一致，在自定义 UITableViewCell 子类中重新实现了prepareForReuse，尝试使用 IBOutlets v. 标签在我的 UITableViewCell 子类中定义字段，也许还有一些其他的东西，但没有一个奏效。
这个问题和我之前的问题有点关系：Debugging strategies when UITableView's cells don't load?
编程的难点在于始终知道要问哪个问题，所以如果我问错了问题，我深表歉意。
更新 6：问题是 iOS 5 上 UITableViewCell 的自定义布局
我使用自定义布局的 UITableViewCell 和 UITableViewCell 的子类进行了测试。在 iOS 5 和 iOS 6 iPhone 模拟器上使用 UITableViewCellStyleDefault 样式的 UITableViewCell 的子类确实。但是，使用具有自定义样式的通用 UITableViewCell在 iOS 5 上会崩溃，但在 iOS 6 上不会。有趣的是，我在 UITableViewCell 的文档中没有看到自定义 UITableViewCellStyle 的声明...
更新 5：iOS 5 v. 6 + 自定义 UITableViewCell 子类？
您好：今天继续测试，iOS 5 和 6 处理自定义 UITableViewCell 子类的方式似乎存在问题。还没有解决方案:(
更新 4：iOS 5 与 iOS 6？
所以我能注意到的是，这似乎是 iOS 5 与 iOS 6 的问题。在 iOS 6 上使用GlassboxCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier] 行测试时，下面的代码有效。但是，该行和 GlassboxCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath] 在 iOS 5 中都不起作用。有什么想法吗？通过将标识符更改为protocell，我不知何故让它工作了一次。
更新 3：我现在使用 GitHub！
这里是相关的回购：https://github.com/kenmhaggerty/Glassbox
更新 2：更多观察
所以我添加了@synthesize tableView = _tableView，因为我在某处读到它可能有帮助的回复，但我现在意识到它阻止了我的数据加载到我的表格视图中，即使在 iOS 模拟器上运行也是如此。注释掉那行代码会将代码返回到我上面描述的方式：它在 iOS 模拟器上工作得很好，但在dequeueReusableCellWithIdentifier: 行中断，没有指定错误，只是Thread 1: breakpoint 1.1。
更新 1：相关代码
GlassboxTableViewController.h
//
// GlassboxTableViewController.h
// Glassbox
//
// Created by Ken M. Haggerty on 10/22/12.
// Copyright (c) 2012 Ken M. Haggerty. All rights reserved.
//
#pragma mark - // NOTES (Public) //
#pragma mark - // IMPORTS (Public) //
#import <UIKit/UIKit.h>
#pragma mark - // PROTOCOLS //
//@protocol GlassboxTableViewDatasource <NSObject>
//@property (nonatomic, weak) NSMutableArray *arrayOfPlayers;
//@end
#pragma mark - // DEFINITIONS (Public) //
@interface GlassboxTableViewController : UITableViewController
@property (nonatomic, strong) NSMutableArray *arrayOfPlayers;
- (IBAction)addPlayer:(UIBarButtonItem *)sender;
//@property (nonatomic, strong) id <GlassboxTableViewDatasource> datasource;
@end
GlassboxTableViewController.m
//
// GlassboxTableViewController.m
// Glassbox
//
// Created by Ken M. Haggerty on 10/22/12.
// Copyright (c) 2012 Ken M. Haggerty. All rights reserved.
//
#pragma mark - // NOTES (Private) //
#pragma mark - // IMPORTS (Private) //
#import "GlassboxTableViewController.h"
#import "GlassboxCell.h"
#import "Player.h"
#import <MobileCoreServices/MobileCoreServices.h>
#pragma mark - // DEFINITIONS (Private) //
#define SIDEBAR_WIDTH_PERCENT 0.75
@interface GlassboxTableViewController () <UITableViewDataSource, UITableViewDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate>
//@property (nonatomic, weak) IBOutlet UITableView *tableView;
- (void)setup;
@end
@implementation GlassboxTableViewController
#pragma mark - // SETTERS AND GETTERS //
@synthesize arrayOfPlayers = _arrayOfPlayers;
@synthesize tableView = _tableView;
//@synthesize datasource = _datasource;
- (void)setArrayOfPlayers:(NSMutableArray *)arrayOfPlayers
{
_arrayOfPlayers = arrayOfPlayers;
}
- (NSMutableArray *)arrayOfPlayers
{
if (!_arrayOfPlayers) _arrayOfPlayers = [[NSMutableArray alloc] init];
// [_arrayOfPlayers addObject:[[Player alloc] initWithUsername:@"Ken H.:"]];
return _arrayOfPlayers;
}
#pragma mark - // INITS AND LOADS //
- (void)setup
{
self.tableView.dataSource = self;
self.tableView.delegate = self;
}
- (id)initWithStyle:(UITableViewStyle)style
{
NSLog(@"[initWithStyle]");
self = [super initWithStyle:style];
if (self) {
[self setup];
}
return self;
}
- (void)viewDidLoad
{
NSLog(@"[viewDidLoad]");
[super viewDidLoad];
[self setup];
// 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;
}
//- (void)viewDidAppear:(BOOL)animated
//{
// [super viewDidAppear:animated];
// [self.view setFrame:CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y, self.view.frame.size.width*SIDEBAR_WIDTH_PERCENT, self.view.frame.size.height)];
//}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - // PUBLIC FUNCTIONS //
- (IBAction)addPlayer:(UIBarButtonItem *)sender
{
[self alertAddPlayer];
}
#pragma mark - // PRIVATE FUNCTIONS //
- (void)alertAddPlayer
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Add New Player" message:@"Please type player name:" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK",nil];
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
alert.tag = 1;
[alert show];
}
- (void)alertInvalidPlayer
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Invalid Name" message:@"Please type another name:" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK",nil];
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
alert.tag = 1;
[alert show];
}
- (void)alertAddPhoto
{
NSLog(@"[TEST] alertAddPhoto");
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
NSArray *mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
if ([mediaTypes containsObject:(NSString *)kUTTypeImage])
{
UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
imagePickerController.delegate = self;
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePickerController.allowsEditing = YES;
// imagePickerController.cameraDevice = UIImagePickerControllerCameraDeviceFront;
// imagePickerController.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;
imagePickerController.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeImage];
// [self presentViewController:imagePickerController animated:YES completion:nil];
imagePickerController.cameraDevice = UIImagePickerControllerCameraDeviceFront;
[self presentModalViewController:imagePickerController animated:YES];
return;
}
}
NSLog(@"[TEST] No camera available");
[self.tableView reloadData];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
if (!image) image = [info objectForKey:UIImagePickerControllerOriginalImage];
if (image)
{
[[self.arrayOfPlayers lastObject] setPhoto:[[UIImageView alloc] initWithImage:image]];
}
[self dismissImagePicker];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[self dismissImagePicker];
}
- (void)dismissImagePicker
{
// [self dismissViewControllerAnimated:YES completion:^{
// [self.tableView reloadData];
// }];
[self dismissModalViewControllerAnimated:YES];
[self.tableView reloadData];
}
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 0) NSLog(@"Cancel tapped");
else
{
if (alertView.tag == 1)
{
if (buttonIndex == 1)
{
if ([[[alertView textFieldAtIndex:0] text] length] != 0)
{
[self.arrayOfPlayers addObject:[[Player alloc] initWithUsername:[[alertView textFieldAtIndex:0] text]]];
[self alertAddPhoto];
}
else [self alertInvalidPlayer];
}
}
}
}
#pragma mark - // PRIVATE FUNCTIONS (Miscellaneous) //
// TableView data source //
//- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
//{
//#warning Potentially incomplete method implementation.
// // Return the number of sections.
// return 0;
//}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// return self.datasource.arrayOfPlayers.count;
return self.arrayOfPlayers.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"New Cell";
// GlassboxCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
GlassboxCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
cell.name.text = [[self.arrayOfPlayers objectAtIndex:indexPath.row] username];
cell.action.text = @"LOADED SUCCESSFULLY";
cell.time.text = @"Just now";
cell.photo = [[self.arrayOfPlayers objectAtIndex:indexPath.row] photo];
// [((UILabel *)[cell viewWithTag:1]) setText:[[self.arrayOfPlayers objectAtIndex:indexPath.row] username]];
// [((UILabel *)[cell viewWithTag:2]) setText:@"has been added."];
// [((UILabel *)[cell viewWithTag:3]) setText:@"Just now"];
// [((UIImageView *)[cell viewWithTag:4]) setImage:[[[self.arrayOfPlayers objectAtIndex:indexPath.row] photo] image]];
[cell.contentView setFrame:CGRectMake(cell.contentView.frame.origin.x, cell.contentView.frame.origin.y, cell.contentView.frame.size.width, 120)];
return cell;
}
/*
// 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;
}
*/
// TableView delegate //
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Navigation logic may go here. Create and push another view controller.
/*
<#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:@"<#Nib name#>" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
*/
}
@end
如果我应该发布更多信息，请告诉我。
【问题讨论】：
-
这是一个半生不熟的非答案，但如果您更改或重命名了故事板，可能值得从您的设备中删除该应用并重新安装。
-
仍然中断。不错的尝试...我之前遇到过问题，解决方案是我必须逐个字符地重新输入一行代码，所以我不会感到惊讶。
-
您是否尝试关闭自动布局（请参阅我的回答）？
标签： objective-c uitableview subclass reloaddata