在我的应用程序中，我解析了一个 XML 文件，然后我想在 UITableView 中显示该文件的条目。我在网上找到了如何按字母顺序制作部分（如 iPhone 联系人），它适用于我的应用程序。当我点击表格视图中的一行时，我想显示另一个 ViewController，我会在其中找到有关我点击的行的一些信息，但我遇到了一些问题：当我点击一行时，变量 indexPath.row引用了该部分和新视图控制器中的信息不正确。我将在此处发布一些屏幕截图，以显示您想要我试图解释的内容。
在下面的图片中，您可以看到应用程序应该如何工作：
在以下图片中，您可以看到我的应用程序的错误：
您可以看到在图 1 中名称是相同的，在图 2 中您可以看到名称是错误的。我想这取决于变量indexPath.row。我将在此处发布创建和填充 tableview 的代码：
#import "TableWasteViewController.h"
#import "WasteXmlParser.h"
#import "WasteDetailViewController.h"
@interface TableWasteViewController ()
@property(nonatomic,strong)NSArray *arrayWastes;
@property(nonatomic,strong)NSMutableArray *typeOfWaste;
@property(nonatomic,strong)NSMutableArray *typeOfBin;
@property(nonatomic,strong)NSMutableArray *indexWastes;
@property(nonatomic,strong)NSMutableArray *typeOfWasteBackup;
@end
@implementation TableWasteViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
WasteXmlParser *parser = [[WasteXmlParser alloc]init];
[parser parseWasteXml];
self.arrayWastes = [[NSArray alloc]init];
self.arrayWastes = [parser.arrayWastes mutableCopy];
self.indexWastes = [[NSMutableArray alloc]init];
self.typeOfWaste = [[NSMutableArray alloc]init];
self.typeOfBin = [[NSMutableArray alloc]init];
for (int i = 0; i < [self.arrayWastes count]; i++) {
[self.typeOfWaste addObject:[[self.arrayWastes objectAtIndex:i] objectForKey:@"type"]];
[self.typeOfBin addObject:[[self.arrayWastes objectAtIndex:i]objectForKey:@"place"]];
}
for (int i = 0; i < [self.typeOfWaste count]-1; i++) {
char alphabet = [[self.typeOfWaste objectAtIndex:i] characterAtIndex:0];
NSString *uniChar = [NSString stringWithFormat:@"%c", alphabet];
if (![self.indexWastes containsObject:uniChar]) {
[self.indexWastes addObject:uniChar];
}
}
self.typeOfWasteBackup = [self.typeOfWaste mutableCopy];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [self.indexWastes count];
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
return [self.indexWastes objectAtIndex:section];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSString *alphabet = [self.indexWastes objectAtIndex:section];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] %@",alphabet];
NSArray *wastes = [self.typeOfWaste filteredArrayUsingPredicate:predicate];
return [wastes count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
UIFont *myFont = [UIFont fontWithName:@"Arial" size:14.0];
if (cell == nil) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
NSString *alphabet = [self.indexWastes objectAtIndex:[indexPath section]];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] %@", alphabet];
NSArray *wastes = [self.typeOfWaste filteredArrayUsingPredicate:predicate];
if ([wastes count] > 0) {
NSString *cellValue = [wastes objectAtIndex:indexPath.row];
cell.textLabel.font = myFont;
cell.textLabel.numberOfLines = 2;
cell.textLabel.text = cellValue;
}
return cell;
}
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView {
return self.indexWastes;
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
NSIndexPath *indexPath = [self.tableWaste indexPathForSelectedRow];
WasteDetailViewController *vc = segue.destinationViewController;
vc.typeOfWaste = [self.typeOfWaste objectAtIndex:indexPath.row];
vc.typeOfBin = [self.typeOfBin objectAtIndex:indexPath.row];
vc.urlPic = [self.arrayWastes[indexPath.row]objectForKey:@"imgUrl"];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
- (IBAction)backToHome:(id)sender {
[self dismissViewControllerAnimated:YES completion:nil];
}
@end
我希望你能帮助我解决这个问题。谢谢