如果有帮助的话，我会在下面给出我的全部代码.....
#import "ContentViewController.h"
#import "ContentViewController.h"
#import "MediaPlayerViewController.h"
#import "TwitterViewController.h"
#import "YoutubeViewController.h"
@implementation ContentViewController
@synthesize imageView;
@synthesize imageView1;
@synthesize tableView;
@synthesize navigationController;
@synthesize toolBar;
@synthesize item;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - XMLParser Delegate
-(void)parseXMLFileAtURL:(NSString *)URL{
NSURL *xmlURL = [NSURL URLWithString:URL];
rssParser = [[NSXMLParser alloc]initWithContentsOfURL:xmlURL];
[rssParser setDelegate:self];
[rssParser setShouldProcessNamespaces:NO];
[rssParser setShouldReportNamespacePrefixes:NO];
[rssParser setShouldResolveExternalEntities:NO];
[rssParser parse];
NSLog(@"Parsed");
}
-(void)parserDidStartDocument:(NSXMLParser *)parser{
NSLog(@"Found file and started parsing");
}
-(void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError{
NSString *errorString = [NSString stringWithFormat:@"Unable to download feed from website (Error Code %i)", [parseError code]];
NSLog(@"Error parsing xml: %@", errorString);
UIAlertView *errorAlert = [[UIAlertView alloc]initWithTitle:@"Error loading content" message:errorString delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
[errorAlert show];
}
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{
currentElement = [elementName copy];
if ([elementName isEqualToString:@"channel"]) {
rssElement = [[NSMutableDictionary alloc]init];
title = [[NSMutableString alloc]init];
link = [[NSMutableString alloc]init];
description = [[NSMutableString alloc]init];
copyright = [[NSMutableString alloc]init];
}
}
-(void)parser: (NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{
if ([elementName isEqualToString:@"channel"]) {
[rssElement setObject:title forKey:@"title"];
[rssElement setObject:link forKey:@"link"];
[rssElement setObject:description forKey:@"description"];
[rssElement setObject:copyright forKey:@"copyright"];
[item addObject:[rssElement copy]];
NSLog(@"adding stories %@", title);
}
}
-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
if ([currentElement isEqualToString:@"title"]) {
[title appendString:string];
}else if ([currentElement isEqualToString:@"link"]) {
[link appendString:string];
}else if ([currentElement isEqualToString:@"description"]) {
[description appendString:string];
}else if ([currentElement isEqualToString:@"copyright"]) {
[copyright appendString:string];
}
}
-(void)parserDidEndDocument:(NSXMLParser *)parser{
NSLog(@"all done");
NSLog(@"item array has %d items", [item count]);
[tableView reloadData];
NSLog(@"Finished Parsing");
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
/* Add Segmented Controller */
if (segmentedControl == nil) {
segmentedControl = [[UISegmentedControl alloc] initWithItems:
[NSArray arrayWithObjects:@"Video", @"Images", @"Audio", nil]];
}
[segmentedControl setFrame:CGRectMake(55.0, 47.0, 180.0, 31.0)];
[segmentedControl setSegmentedControlStyle:UISegmentedControlStyleBar];
[segmentedControl setWidth:70.0 forSegmentAtIndex:0];
[segmentedControl setWidth:70.0 forSegmentAtIndex:1];
[segmentedControl setWidth:70.0 forSegmentAtIndex:2];
[segmentedControl addTarget:self
action:@selector(segmentClick:)
forControlEvents:UIControlEventValueChanged];
[segmentedControl setMomentary:YES];
// [[[segmentedControl subviews]objectAtIndex:0]setTintColor:[UIColor blackColor]];
[self.view addSubview:segmentedControl];
/* Add Image View */
imageView1.image = [UIImage imageNamed:@"Harry.png"];
/* Add Page Control */
pageControl = [[UIPageControl alloc] init];
pageControl.frame = CGRectMake(120.0, 250.0, 100.0 ,10.0);
pageControl.numberOfPages = 5;
pageControl.currentPage = 0;
[self.view addSubview:pageControl];
/* Customize Table View */
tableView.backgroundColor = [UIColor clearColor];
imageView.image = [UIImage imageNamed:@"gradientBackground.png"];
item = [[NSMutableArray alloc]init];
if ([item count] == 0) {
path = @"http://172.19.58.172/Android/GetApprovedList.php?ip=172.19.58.172&type=Video";
[self parseXMLFileAtURL:path];
[tableView reloadData];
NSLog(@"Returned %@", item);
}
headerLabel = [[UILabel alloc]initWithFrame:CGRectMake(10.0, 270.0, 300.0, 14.0)];
headerLabel.text = @"Latest Videos";
headerLabel.textColor = [UIColor whiteColor];
headerLabel.backgroundColor = [UIColor clearColor];
[self.view addSubview:headerLabel];
}
/* Assign control to Segment Controller */
-(void)segmentClick:(UISegmentedControl *)segmentControl {
if (segmentControl.selectedSegmentIndex == 1){
if ([item count] == 0) {
path = @"http://172.19.58.172/Android/GetApprovedList.php?ip=172.19.58.172&type=Image";
[self parseXMLFileAtURL:path];
[tableView reloadData];
headerLabel.text = @"Latest Images";
NSLog(@"Returned %@",item);
}
}
else if (segmentedControl.selectedSegmentIndex == 2){
if ([item count] == 0) {
path = @"http://172.19.58.172/Android/GetApprovedList.php?ip=172.19.58.172&type=Audio";
[self parseXMLFileAtURL:path];
[tableView reloadData];
headerLabel.text = @"Latest Audios";
NSLog(@"Returned no items");
// [[[segmentedControl subviews]objectAtIndex:2]setTintColor:[UIColor blackColor]];
}
}
else {
if ([item count] == 0) {
path = @"http://172.19.58.172/Android/GetApprovedList.php?ip=172.19.58.172&type=Video";
[self parseXMLFileAtURL:path];
[tableView reloadData];
headerLabel.text = @"Latest Videos";
NSLog(@"Returned %@", item);
}
// [[[segmentedControl subviews]objectAtIndex:0]setTintColor:[UIColor blackColor]];
}
}
#pragma mark Table View Data Source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSLog(@"this is returned %@", item);
return item.count;
}
- (UITableViewCell *)tableView:(UITableView *)aTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
}
int feed = [indexPath indexAtPosition:[indexPath length] - 1];
cell.textLabel.text = [[item objectAtIndex:feed]objectForKey:@"title"];
cell.detailTextLabel.text = [[item objectAtIndex:feed]objectForKey:@"description"];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
NSString *moviePath = [self.item objectAtIndex:indexPath.row];
NSURL *movieURL = [NSURL fileURLWithPath:moviePath];
NSLog(@"Item has %@", movieURL);
playerController = [[MPMoviePlayerController alloc]initWithContentURL:movieURL];
[playerController play];
// MediaPlayerViewController *mediaView = [[MediaPlayerViewController alloc]initWithNibName:@"MediaPlayerViewController" bundle:nil];
// [self presentModalViewController:mediaView animated:YES];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if (buttonIndex == 0) {
shareAlert = [[UIActionSheet alloc]initWithTitle:@"Share to" delegate:self cancelButtonTitle:@"Cancel"
destructiveButtonTitle:@"Facebook" otherButtonTitles:@"Twitter", nil];
[shareAlert showInView:self.view];
}
else if (buttonIndex == 1){
NSLog(@"button 2");
}
}
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
if (buttonIndex == 1) {
TwitterViewController *twitterController = [[TwitterViewController alloc]initWithNibName:@"TwitterViewController" bundle:nil];
[self presentModalViewController:twitterController animated:YES];
}
}
-(void)moviePlayBackDidFinish:(NSNotification *)notification{
MPMoviePlayerController *moviePlayerController = [notification object];
[moviePlayerController.view removeFromSuperview];
[moviePlayerController release];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
@end
更改了didSelectRow方法，如下所示：
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
moviePath = [[item objectAtIndex:indexPath.row]objectForKey:@"link"];
NSLog(@"moviepath has %@", moviePath);
movieURL = [NSURL URLWithString:moviePath];
NSLog(@"movieURL has %@", movieURL);
viewController = [[MPMoviePlayerViewController alloc]initWithContentURL:movieURL];
[self presentMoviePlayerViewControllerAnimated:viewController];
viewController.moviePlayer.movieSourceType = MPMovieSourceTypeStreaming;
[playerController play];
viewController = nil;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(moviePlayBackDidFinish:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:viewController];
}
- (void) moviePlayBackDidFinish:(NSNotification*)notification {
viewController = [notification object];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:MPMoviePlayerPlaybackDidFinishNotification
object:viewController];
if ([viewController respondsToSelector:@selector(setFullscreen:animated:)])
{
[viewController.view removeFromSuperview];
}
}
现在，在选择任何一行时，一个空白屏幕即将到来，应用程序就会卡在那里。视频无法播放
对此方面的任何帮助表示赞赏。
提前致谢。
答案 0 :(得分：0)
通过查看代码，我可以告诉您的是，您不必重新分配您的项目对象。
如果您已在类中的某个位置分配了item对象并将值存储在其中，则不要像在此处那样重新分配它：
item = [[NSMutableArray alloc]init];
NSString *moviePath = [item objectAtIndex:indexPath.row];
通过重新分配它，你正在为它分配一个新的内存，而在新的内存中没有任何对象存在。
答案 1 :(得分：0)
您正在通过以下方式为阵列分配新内存：item = [[NSMutableArray alloc]init];。它现在意味着NO个对象。并且您正试图通过NSString *moviePath = [item objectAtIndex:indexPath.row];访问它，而indexPath.row处没有任何对象，这就是它崩溃的原因。
答案 2 :(得分：0)
播放视频的代码实际上没有任何问题。错误发生在用于解析和检索rss feed的代码中，这最终给了我错误的视频名称。因此，视频没有播放。
解析代码为Parsing attributes with same name but in different fields in iOS