I create one application that has one page. In that page there is one button, label & a progressview. What I want is starting a download when clicking on the button and show progress & label status download.
I can make progressview but I can not make a label that show download status.
For example, I want my label to show "12 MB downloaded of 100 MB"
This is my code:
view controller.h
#interface ViewController : UIViewController
{
float expectedBytes;
}
#property (weak,nonatomic) IBOutlet UIProgressView *progressView;
#property (strong,nonatomic) IBOutlet UIButton *download;
- (IBAction)download:(id)sender;
#end
view controller.m
#implementation ViewController
{
NSMutableData *receivedData;
NSString *currentURL;
NSString *name;
}
- (void)viewDidLoad
{
currentURL = #"http://192.168.1.100/mamal/Adele%20-%20Someone%20Like%20You%20(MTV%20Video%20Music%20Awards%202011)%20HD%20Live.mkv";
name = [currentURL lastPathComponent];
[super viewDidLoad];
}
#synthesize progressView,download;
-(IBAction)download:(id)sender
{
NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString* foofile = [documentsPath stringByAppendingPathComponent:name];
BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:foofile];
if (!fileExists)
{
[self downloadWithNsurlconnection];
}
else
{
NSLog(#"FILE EXIST");
}
}
-(void)downloadWithNsurlconnection
{
NSURL *url = [NSURL URLWithString:currentURL];
NSURLRequest *theRequest = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:600];
receivedData = [[NSMutableData alloc] initWithLength:0];
NSURLConnection * connection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self startImmediately:YES];
[connection start];
}
- (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
progressView.hidden = NO;
[receivedData setLength:0];
expectedBytes = [response expectedContentLength];
}
- (void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[receivedData appendData:data];
float progressive = (float)[receivedData length] / (float)expectedBytes;
[progressView setProgress:progressive];
}
- (void) connectionDidFinishLoading:(NSURLConnection *)connection {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSLog(#"%#",paths);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *pdfPath = [documentsDirectory stringByAppendingPathComponent:name];
NSLog(#"Succeeded! Received %d bytes of data",[receivedData length]);
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
[receivedData writeToFile:pdfPath atomically:YES];
}
Please guide me how show status download in UILabel with NSURLConnection.
put this syntax in .h file
#property (weak,nonatomic) IBOutlet UILabel *label;
then in .m file
- (void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[receivedData appendData:data];
float progressive = (float)[receivedData length] / (float)expectedBytes;
[progressView setProgress:progressive];
[lable setText:[NSString stringWithFormat:#"%u MB of %f MB",[receivedData length],expectedBytes]];
}
Create an Outlet for the label
#property (weak,nonatomic) IBOutlet UILabel *label;
then in
- (void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[receivedData appendData:data];
float progressive = (float)[receivedData length] / (float)expectedBytes;
[progressView setProgress:progressive];
[lable setText:[NSString stringWithFormat:#"%u MB of %f MB",[receivedData length],expectedBytes]];
}
you can change the bytes into MB
Related
I am developing an iOS app. I download the text file from a URL and save it into a directory, but I can't find the file in the directory, so the code downloads it again. How do I check for the file?
if ([[NSFileManager defaultManager] fileExistsAtPath:localfile]) {
content = [NSString stringWithContentsOfFile:localfile
encoding:NSUTF8StringEncoding
error:NULL];
}else
{
NSURL* url = [NSURL URLWithString:#"http://webapp.opaxweb.net/books/gurugranthsahib.txt"];
NSArray* pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
NSString* documentsDir = [pathArray objectAtIndex:0];
localfile =[documentsDir stringByAppendingPathComponent:#"data"];
NSData* data = [NSData dataWithContentsOfURL:url];
[data writeToFile:localfile atomically:YES];
content = [NSString stringWithContentsOfFile:localfile
encoding:NSUTF8StringEncoding
error:NULL];
}
_textfield.text=content;
Your text data is quite big and hence you should use nsurl connection! Your code is totally correct but this is a better approach.
- (void)viewDidLoad
{
[super viewDidLoad];
self.fileName = #"Data";
self.fileData = [NSMutableData data];
[self checkFileExitsorNOt];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[self.fileData setLength:0];
self.totalFileSize = [NSNumber numberWithLongLong:[response expectedContentLength]];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[self.fileData appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSArray *dirArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSLog(#"%#", [dirArray objectAtIndex:0]);
NSString *path = [NSString stringWithFormat:#"%#/%#", [dirArray objectAtIndex:0],self.fileName];
if ([self.fileData writeToFile:path options:NSAtomicWrite error:nil] == NO) {
NSLog(#"writeToFile error");
}
else {
NSLog(#"Written!");
}
}
-(void) checkFileExitsorNOt
{
NSArray *dirArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSLog(#"%#", [dirArray objectAtIndex:0]);
NSString *path = [NSString stringWithFormat:#"%#/%#", [dirArray objectAtIndex:0],self.fileName];
if ([[NSFileManager defaultManager] fileExistsAtPath:path]) {
NSString *cont = [NSString stringWithContentsOfFile:localfile
encoding:NSUTF8StringEncoding
error:NULL];
NSLog(#"Content from file : %#",cont);
}
else
{
NSString *file = [NSString stringWithFormat:#"http://webapp.opaxweb.net/books/gurugranthsahib.txt"];
NSURL *fileURL = [NSURL URLWithString:file];
NSURLRequest *req = [NSURLRequest requestWithURL:fileURL];
NSURLConnection *conn = [NSURLConnection connectionWithRequest:req delegate:self];
}
}
I have a Login page in that when i press "login" button i have to call a webservice and load new view according to the response
it is taking 3 to 4 seconds i want to show activity indicator for loading view
how to show that
i'm using asynchronous NSURLConnection with NSURLConnection delegates
NSURLConnection *conn = [[NSURLConnection alloc]initWithRequest:request delegate:self];
[conn start];
in didFinishLoading
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSError *e = nil;
res = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableLeaves error:&e];
//[indicator performSelectorOnMainThread:#selector(stopAnimating) withObject:nil waitUntilDone:YES];
NSLog(#"data is %#",res);
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"create.json"];
NSLog(#"file path is %# ",path);
NSFileManager *fileManager=[NSFileManager defaultManager];
if(![fileManager fileExistsAtPath:path])
{
NSString *bundle = [[[NSBundle mainBundle]resourcePath]stringByAppendingString:#"create.json"];
[fileManager copyItemAtPath:bundle toPath:path error:&error];
}
[res writeToFile:path atomically:YES];
how to show in this view
i stucked here
In your #interface, add:
#property (nonatomic, strong) UIActivityIndicatorView *ai;
When you start your connection, start your spinner:
NSURLConnection *conn = [[NSURLConnection alloc]initWithRequest:request delegate:self];
[conn start];
_ai = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
_ai.frame = CGRectMake(0, 0, 24, 24); // adjust the frame to where you want the spinner to appear
[_ai startAnimating];
[self.view addSubview:_ai];
And when your connection completes, remove it:
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
[_ai stopAnimating];
[_ai removeFromSuperView];
... // all your other code
}
Make sure you remove it the same way in the connectionDidFailWithError: callback as well.
If you want something prettier, check out the github link #evnaz posted and use that instead of UIActivityIndicatorView with this same flow
I have a json http://vmg.hdvietpro.com/ztv/home and how to parsing data json in this link to table view. I try this code but i cant get data from json to my application.Thanks for help
Movies.h
#interface Movies : NSObject
#property (strong,nonatomic) NSString *moviesId;
#property (strong,nonatomic) NSString *text1;
#property (strong,nonatomic) NSString *thumbnail;
#pragma mark -
#pragma mark Class Methods
-(id)initWithMoviesName:(NSString *)cText1 andThumbnail:(NSString*) cThum andMoviesID:(NSString*) cID;
#end
Movies.m
#implementation Movies
#synthesize text1,moviesId,thumbnail;
-(id)initWithMoviesName:(NSString *)cText1 andThumbnail:(NSString*) cThum andMoviesID:(NSString *) cID{
self=[super init];
if (self) {
text1=cText1;
thumbnail=cThum;
moviesId=cID;
}
return self;
}
#end
TableViewController
#define getDataURL #"http://vmg.hdvietpro.com/ztv/home"
-(void) retrieveData{
NSURL *url=[NSURL URLWithString:getDataURL];
NSData *data=[NSData dataWithContentsOfURL:url];
jsonArray=[NSJSONSerialization JSONObjectWithData:data
options:kNilOptions error:nil];
moviesArray=[[NSMutableArray alloc] init];
for (int i=0; i<jsonArray.count; i++) {
NSString *cID=[[jsonArray objectAtIndex:i] objectForKey:#"id"];
NSString *cName=[[jsonArray objectAtIndex:i] objectForKey:#"text1"];
NSString *cThum=[[jsonArray objectAtIndex:i] objectForKey:#"thumbnail"];
[moviesArray addObject:[[Movies alloc]initWithMoviesName:cName andThumbnail:cThum andMoviesID:cID]];
}
[self.tableView reloadData];
}
Try Following:
NSArray * respArray = [[[[json objectForKey:#"response"]objectForKey:#"hot_program"]objectForKey:#"itemPage"]objectForKey:#"page"];
Try doing something like this. This is not the exact solution and you'll have to work around your way.
NSString *link = [NSString stringWithFormat:#"yourServiceURL"];
NSString *encdLink = [link stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *url=[NSURL URLWithString:encdLink];
NSData *response = [NSData dataWithContentsOfURL:url];
NSError *error;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:response options: NSJSONReadingMutableContainers error: &error];
Now you have your data in the array and extract it out using objectForKey or valueForKey.
This is what I am doing to fetch images from JSON and showing in my app. Firstly get the array from the above code. Then extract out the image content like this :
_demoArray = [json valueForKey:#"ContentImage"];
Now you have the values in your demoArray.
Hope this helps.
I thing it's useful for you.try this way
#import "ViewController.h"
#interface ViewController ()
{
NSMutableData *webData;
NSURLConnection *connection;
NSMutableArray *array;
}
#end
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[[self TableView]setDataSource:self];
array=[[NSMutableArray alloc]init];
NSURL *url=[NSURL URLWithString:#"https://itunes.apple.com/us/rss/topaudiobooks/limit=10/json"];
NSLog(#"https://itunes.apple.com/us/rss/topaudiobooks/limit=10/json");
NSURLRequest *req=[NSURLRequest requestWithURL:url];
connection=[NSURLConnection connectionWithRequest:req delegate:self];
if(connection)
{
NSLog(#"Connected");
webData=[[NSMutableData alloc]init];
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[webData setLength:0];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[webData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(#"Error is");
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSDictionary *all=[NSJSONSerialization JSONObjectWithData:webData options:0 error:nil];
// NSString *label=[all objectForKey:#"lable" ];
// [array addObject:label];
NSDictionary *feed=[all objectForKey:#"feed"];
NSArray *arrayOFEntry=[feed objectForKey:#"entry"];
for (NSDictionary *diction in arrayOFEntry) {
NSDictionary *title=[diction objectForKey:#"title"];
NSString *label=[title objectForKey:#"label"];
[array addObject:label];
}NSLog(#"good mrng");
[[self TableView]reloadData];
}
- (IBAction)getTopMoves:(id)sender
{
NSLog(#"good mrng");
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [array count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (!cell)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] ;
}
cell.textLabel.text = [array objectAtIndex:indexPath.row];
return cell;
return cell;
}
#end
try this...
-(void) retrieveData1
{
NSURL * url = [NSURL URLWithString:getDataURL1];
NSData * data = [NSData dataWithContentsOfURL:url];
id json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
_moviesArray=[[NSMutableArray alloc] init];
_moviesArray1=[[NSMutableArray alloc] init];
_moviesArray2=[[NSMutableArray alloc] init];
// NSArray * respArray = [[[[json objectForKey:#"response"]objectForKey:#"hot_program"]objectForKey:#"itemPage"]objectForKey:#"page"];
NSDictionary *dic=[json objectForKey:#"response"];
NSDictionary *dic1= [dic objectForKey:#"hot_program"];
NSDictionary *dic2=[dic1 objectForKey:#"itemPage"];
for (NSDictionary *diccc in [dic2 objectForKey:#"page"])
{
NSLog(#"%#",diccc);
[self.moviesArray addObject:[diccc objectForKey:#"id"]];
[self.moviesArray1 addObject:[diccc objectForKey:#"text1"]];
[self.moviesArray2 addObject:[diccc objectForKey:#"thumbnail"]];
}
NSLog(#"%#",self.moviesArray);
NSLog(#"%#",self.moviesArray1);
NSLog(#"%#",self.moviesArray2);
// [self.tableView reloadData];
}
it is one of way to parse a data there is lot of way to parse..
NSArray * respArray = [[[[json objectForKey:#"response"]objectForKey:#"hot_program"]objectForKey:#"itemPage"]objectForKey:#"page"];
NSLog(#"%#",respArray);
NSArray *respArray1= [[[[json objectForKey:#"response"]objectForKey:#"new_video"]objectForKey:#"itemPage"]objectForKey:#"page"];;
NSLog(#"%#",respArray1);
NSArray *respArray2= [[json objectForKey:#"response"]objectForKey:#"hot_program_by_category"];
NSLog(#"%#",respArray2);
for (NSDictionary *dic in [[respArray2 valueForKey:#"itemPage"]valueForKey:#"page"])
{
NSLog(#"%#",dic);
}
and don't forget to reload a tableview..i commented there just uncomment it
I have an app that loops through an array of URLs and downloads all the files in that array (10 small txt files and 1 large image file). I had the app downloading the files ok before but due to a problem with the large image, I had to subclass NSURLConnection and I think I haven't quite got it right as no files are now being downloaded.
For each item of the array getFiles is passed a URL and run:
-(void)getFile:(NSString*)url tag:(NSString*)tag {
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
FileURLConnection *connection = [[FileURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES tag:tag];
if (connection) {
[receivedData setObject:[NSMutableData data] forKey:connection.tag];
}
}
Here are the NSURLConnection delegates:
-(NSMutableData*)dataForConnection:(FileURLConnection*)connection {
NSMutableData *data = [receivedData objectForKey:connection.tag];
return data;
}
- (void)connection:(FileURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
NSUserDomainMask, YES) objectAtIndex:0]stringByAppendingPathComponent:fileName];
NSMutableData *dataForConnection = [self dataForConnection:(FileURLConnection*)connection];
[dataForConnection setLength:0];
}
- (void)connection:(FileURLConnection *)connection didReceiveData:(NSData *)data {
NSMutableData *dataForConnection = [self dataForConnection:(FileURLConnection*)connection];
[dataForConnection appendData:data];
}
- (NSCachedURLResponse *)connection:(FileURLConnection *)connection
willCacheResponse:(NSCachedURLResponse*)cachedResponse {
return nil;
}
- (void)connectionDidFinishLoading:(FileURLConnection *)connection {
NSLog(#"connectionDidFinishLoading run");
NSMutableData *dataForConnection = [self dataForConnection:(FileURLConnection *)connection];
NSString *fileName = connection.tag;
NSString *filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]stringByAppendingPathComponent:fileName];
[[NSFileManager defaultManager] createFileAtPath:filePath contents:nil attributes:nil];
file = [NSFileHandle fileHandleForUpdatingAtPath:filePath];
[file seekToEndOfFile];
[file writeData:dataForConnection];
[file closeFile];
}
EDIT: If I NSLog the receivedData (NSDictionary) in getFile it updates the 'tag' object but no data to go with it:
"accomodation.txt" = <>;
"future-congress-dates.txt" = <>;
"general-file.txt" = <>;
...
I have also tried to NSLog the dataForConnection (NSMutableData) for each delegate but nothing ever gets printed:
NSLog(#"dataForConnection %#", dataForConnection);
Ok, I surrender.
There is full code:
FileURLConnection:
#interface FileURLConnection: NSURLConnection
#property (nonatomic, strong) NSFileHandle *file;
#end
getFile function:
-(void)getFile {
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:fullURL]];
FileURLConnection *conn = [[FileURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];
}
- (void)connection:(FileURLConnection*)connection didReceiveResponse:(NSURLResponse *)response {
NSString *fileName = [[response URL] lastPathComponent];
NSString *filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]stringByAppendingPathComponent:fileName];
[[NSFileManager defaultManager] createFileAtPath:filePath contents:nil attributes:nil];
connection.file = [NSFileHandle fileHandleForUpdatingAtPath:filePath];
}
- (void)connection:(FileURLConnection *)connection didReceiveData:(NSData *)data {
[connection.file writeData:data];
}
- (NSCachedURLResponse *)connection:(FileURLConnection *)connection
willCacheResponse:(NSCachedURLResponse*)cachedResponse {
return nil;
}
- (void)connectionDidFinishLoading:(FileURLConnection *)connection {
NSLog(#"Connection is %#", connection);
[connection.file closeFile];
}
- (void)connection:(FileURLConnection *)connection didFailWithError:(NSError *)error {
NSLog(#"error - %#", error);
}
Original question: App crashing when downloading a large file - NSFileHandle seekToEndOfFile
I am trying to download a .ashx file from server from my ipad application.
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSString *file = [NSString stringWithFormat:#"http://url/Script.ashx"];
NSURL *fileURL = [NSURL URLWithString:file];
NSURLRequest *req = [NSURLRequest requestWithURL:fileURL];
NSURLConnection *conn = [NSURLConnection connectionWithRequest:req delegate:self];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[self.fileData setLength:0];
// self.totalFileSize = [NSNumber numberWithLongLong:[response expectedContentLength]];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[self.fileData appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSArray *dirArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSLog(#"%#", [dirArray objectAtIndex:0]);
NSString *path = [dirArray objectAtIndex:0];
NSString *dataPath = [path stringByAppendingPathComponent:#"Script.ashx"];
dataPath = [dataPath stringByStandardizingPath];
if ([self.fileData writeToFile:dataPath options:NSAtomicWrite error:nil] == NO) {
NSLog(#"writeToFile error");
}
else {
NSLog(#"Written!");
}
}
Any error on the above code? please help.