当保存我的表的视图是主（第一个）视图时，一切正常。
但是，当它不是第一个视图并且我切换到该视图时，我的表不会加载数据，并且我得到一个空桌子.
使用 NSLog 我可以看出该程序是不调用 numberOfRowsInSection 和 cellForRowAtIndexPath.
I have <UITableViewDataSource, UITableViewDelegate>, IBOutlet UITableview *tableView全部宣布。它们也在 InterfaceBuilder 中连接。
我尝试使用viewWillAppear and [tableView reloadData]但这没有帮助。
我是 iPhone 开发新手，非常感谢您的帮助！
UPDATE:
我尝试了 [tableView reloadData] 但什么也没发生。
除了dealloc，我不会在任何地方释放tableView。
这是一些代码：
应用程序委托
//
// tpbAppDelegate.m
// tpb
#import "listController.h"
#import "tpbAppDelegate.h"
#import "tpbViewController.h"
@implementation tpbAppDelegate
@synthesize window;
@synthesize viewController;
@synthesize navController;
@synthesize toolbar;
@synthesize btnMyLoc;
@synthesize places; //array that holds data from the XML file
- (void)applicationDidFinishLaunching:(UIApplication *)application {
//add places into an array that can be used by other views (Table)
rssList = [[NSMutableArray alloc] initWithCapacity:1];
NSString *paths = [[NSBundle mainBundle] resourcePath];
NSString *xmlFile = [paths stringByAppendingPathComponent:@"tourplay.xml"];
NSURL *xmlURL = [NSURL fileURLWithPath:xmlFile isDirectory:NO];
NSLog(@"DATA URL: %@", xmlURL);
NSXMLParser *firstParser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL];
[firstParser setDelegate:self];
[firstParser parse];
// Resize window for toolbar:
CGRect frame = viewController.view.frame;
frame.size.height -= toolbar.frame.size.height;
viewController.view.frame = frame;
//[window addSubview:viewController.view];
navController.viewControllers = [NSArray arrayWithObject:viewController];
navController.view.frame = frame;
[window addSubview:navController.view];
[window makeKeyAndVisible];
}
- (IBAction)showList:(id)sender{
//Switch to table view on segment control change
UISegmentedControl *segmentControl = (UISegmentedControl *)sender;
NSString *curSelection = [NSString stringWithFormat:@"%d", [segmentControl selectedSegmentIndex]];
//[segmentControl titleForSegmentAtIndex: [segmentControl selectedSegmentIndex]]];
NSLog(@"pressed button %@", curSelection);
if ([curSelection isEqualToString:@"1"]){
NSLog(@"TABLE SELECTED");
listController *listTable = [[listController alloc] init];
[navController pushViewController:listTable animated:YES]; //SWITCH TO TABLE VIEW (listController)
} else {
tpbViewController *tpb = [[tpbViewController alloc] init];
NSLog(@"MAP SELECTED");
[navController pushViewController:tpb animated:YES];
}
}
#pragma mark Praser Methods
//Parse XML into an array
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict {
//NSLog(@"Started parsing");
if ([elementName compare:@"tour_point"] == NSOrderedSame) {
[self.places addObject:[[NSDictionary alloc] initWithObjectsAndKeys:
//[attributeDict objectForKey:@"tour_point_id"],@"tour_point_id",
[attributeDict objectForKey:@"name"],@"name",
[attributeDict objectForKey:@"tour_html"],@"tour_html",
[attributeDict objectForKey:@"audio_src"],@"audio_src",
nil]];
} else if ([elementName compare:@"title"] == NSOrderedSame) {
titlename = (NSString *)[attributeDict objectForKey:@"titlename"];
NSLog(@"Done parsing %@ points", titlename);
}
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
NSLog(@"Parser end");
[parser release];
}
- (void)dealloc {
[viewController release];
[rssList release];
[places release];
[toolbar release];
[window release];
[super dealloc];
}
@end
listController.h - 表类
#import <UIKit/UIKit.h>
@interface listController : UIViewController <UITableViewDataSource, UITableViewDelegate> {
UITableView *tableView;
NSMutableArray *places;
NSString *titlename;
}
@property (nonatomic, retain) IBOutlet UITableView *tableView;
@end
listController.m - 表实现
//
// listController.m
// tpb
//
//
#import "listController.h"
#import "tpbAppDelegate.h"
@implementation listController
@synthesize tableView;
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
//- (void)viewWillAppear {
tpbAppDelegate *delegate = (tpbAppDelegate *)[[UIApplication sharedApplication] delegate];
places = delegate.places;
NSLog(@"Loaded table view");
[super viewDidLoad];
// [tableView reloadSectionIndexTitles];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tv {
NSLog(@"Number of secions");
return 1;
}
- (NSInteger)tableView:(UITableView *)tv numberOfRowsInSection:(NSInteger)section {
NSLog(@"GETTING COUNT");
return [places count];
}
- (UITableViewCell *)tableView:(UITableView *)tv cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSLog(@"Assigning Cells");
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tv dequeueReusableCellWithIdentifier:CellIdentifier];
if (nil == cell) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
}
cell.textLabel.text = [[places objectAtIndex:indexPath.row] objectForKey:@"name"];
//NSLog(@"count %@", [[places objectAtIndex:indexPath.row] objectForKey:@"name"]);
//cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
- (void)tableView:(UITableView *)tv didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSLog(@"ROW clicked");
[tv deselectRowAtIndexPath:indexPath animated:YES];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (void)viewDidUnload {
NSLog(@"Unloaded tableview");
}
- (void)dealloc {
[tableView release];
[places release];
[super dealloc];
}
@end
-- 到目前为止，我知道 viewDidLoad 会加载，但不会调用 cellforRowAtIndexPath 等表方法。
