如果TableView Cell中的语句不起作用 [英] If statement in TableView Cell not working

问题描述

我正在从plist（复制到文档）调用数据，该数据具有0或1值，具体取决于我是否要选择或不选择复选框。 cell.m文件中的代码如下所示，但我似乎无法改变是否选中了复选框。

I am calling data from a plist (copied to documents) which has a 0 or 1 value depending on whether I want a tickbox selected or not selected. The code in the cell.m file is as follows but I can't seem to get it to alter whether the tickbox is selected or not.

主视图代码：

#import "ffguideViewController.h"
#import "booksCell.h"


@interface ffguideViewController ()

@end

@implementation ffguideViewController

{
    NSArray *title;
    NSArray *thumbnails;
    NSArray *price;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Find out the path of books_star.plist

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory =  [paths objectAtIndex:0];
    NSString *plistPath = [documentsDirectory stringByAppendingPathComponent:@"books_star.plist"];

    // Load the file content and read the data into arrays
    NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:plistPath];
    title = [dict objectForKey:@"title"];
    thumbnails = [dict objectForKey:@"thumbnail"];
    price = [dict objectForKey:@"price"];
}


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [title count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *books_starTableIdentifier = @"booksCell";

    booksCell *cell = (booksCell *)[tableView dequeueReusableCellWithIdentifier:books_starTableIdentifier];
    if (cell == nil)
    {
        NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"booksCell" owner:self options:nil];
        cell = [nib objectAtIndex:0];
    }

    cell.titleLabel.text = [title objectAtIndex:indexPath.row];
    cell.thumbnailImageView.image = [UIImage imageNamed:[thumbnails objectAtIndex:indexPath.row]];
    cell.priceLabel.text = [price objectAtIndex:indexPath.row];

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

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 104;
}

@end

单位代码：

#import "booksCell.h"

@implementation booksCell

@synthesize titleLabel = _titleLabel;
@synthesize priceLabel = _priceLabel;
@synthesize thumbnailImageView = _thumbnailImageView;


- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {}
return self;}


- (void) awakeFromNib {

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory =  [paths objectAtIndex:0];
    NSString *plistPath = [documentsDirectory stringByAppendingPathComponent:@"books_star.plist"];

    // Load the file content and read the data into arrays
    NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:plistPath];

    NSString *checked = [dict objectForKey:@"check"];

    NSLog(@"%@", [[dict objectForKey:@"check"] class]);

    NSLog(@"Checked %@", checked);

    int checkedINT = [checked intValue];

     NSLog(@"CheckedInt %d", checkedINT);

    if (checkedINT == 1){
        checkedImage.image = [UIImage imageNamed:@"check_on.png"];
    } else {
        checkedImage.image = [UIImage imageNamed:@"check_off.png"];}}


- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
    [super setSelected:selected animated:animated];

    // Configure the view for the selected state
}


@end

plist：

    <key>title</key>
    <array>
        <string>Book 1</string>
        <string>Book 2</string>
        <string>Book 3</string>
        <string>Book 4</string>
        <string>Book 5</string>
        <string>Book 6</string>
    </array>
    <key>thumbnail</key>
    <array>
        <string>test.jpg</string>
        <string>test.jpg</string>
        <string>test.jpg</string>
        <string>testjpg</string>
        <string>test.jpg</string>
        <string>test.jpg</string>
        <string>test.jpg</string>
    </array>
    <key>price</key>
    <array>
        <string>£1.00</string>
        <string>£2.00</string>
        <string>£3.00</string>
        <string>£4.00</string>
        <string>£5.00</string>
        <string>£6.00</string>
        <string>£7.00</string>
    </array>
    <key>check</key>
    <array>
        <string>1</string>
        <string>0</string>
        <string>0</string>
        <string>1</string>
        <string>0</string>
        <string>1</string>
        <string>0</string>
    </array>
</dict>
</plist>

推荐答案

移动

 return self;

到代码运行之前的函数结束。

to the end of function not before your code runs.

将来使用断点来查看代码是否被执行。

Use breakpoints in future to even see if code is executed.

关于我们讨论的第二部分问题：

Regarding the second part of question coming out of our discussion:

您正在从XIB（loadNibNamed）创建UITableViewCell。在这种情况下，不使用initWithStyle：而不是实现您的自定义逻辑：

You are creating a UITableViewCell from XIB (loadNibNamed). In this case initWithStyle: is not used. Instead of that implement your custom logic in:

- (void) awakeFromNib

这篇关于如果TableView Cell中的语句不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！