Want to display the array values in the table - iphone

Question

Table View:
-(NSInteger) numberOfSectionsInTableView:(UITableView *)tableView{
return 1;
}
-(NSInteger) tableView:(UITableView *)table numberOfRowsInSection:(NSInteger)section{
return [self.detailArray count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
tableView.delegate = self;
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10.0f, 5.0f, 300.0f, 30.0f)];
label.text=[NSString stringWithFormat:#"%#",[self.detailArray objectAtIndex:indexPath.row]];
label.numberOfLines = 3;
label.font = [UIFont fontWithName:#"Helvetica" size:(12.0)];
label.lineBreakMode = UILineBreakModeWordWrap;
label.textAlignment = UITextAlignmentLeft;
[cell.contentView addSubview:label];
[label release];
[self.myTableView reloadData];
return cell;
}
I want to store the detail (array value) in the tableView.I used both method numberOfRowsInSection and cellForRowAtIndexPath but the table display null. How can I display?

Answer 1

Make property for NSMutable array in .h
#property (nonatomic,retain) NSMutableArray *detailArray;
and synthesize it in .m
#synthesize detailArray=_detailArray;
and change this line
NSMutableArray *detail=[[stepsArr objectAtIndex:i] objectForKey:#"html_instructions"] ;
to
_detailArray=[[stepsArr objectAtIndex:i] objectForKey:#"html_instructions"] ;
then use _detailArray for displaying table data.
- (NSInteger)tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section {
return [_detailArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
// _detailArray objects for date population.
}

Answer 2

Your Code :
NSString *url = [NSString stringWithFormat:#"http://maps.googleapis.com/maps/api/directions/json?origin=%#&destination=%f,%f&sensor=false",startPoint,midannotation.coordinate.latitude,midannotation.coordinate.longitude];
NSURL *googleRequestURL=[NSURL URLWithString:url];
dispatch_async(kBgQueue, ^{
NSData* data = [NSData dataWithContentsOfURL: googleRequestURL];
NSString *someString = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
// NSLog(#"data:%#",someString);
NSError* error;
NSMutableDictionary* parsedJson = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSArray *allkeys = [parsedJson allKeys];
for(int i = 0; i < allkeys.count; i++){
if([[allkeys objectAtIndex:i] isEqualToString:#"routes"]){
arr = [parsedJson objectForKey:#"routes"];
dic = [arr objectAtIndex:0];
// NSLog(#"ALL KEYS FROM ROUTE: %#", [dic allKeys]);
legs = [dic objectForKey:#"legs"];
// NSLog(#"legs array count %d", legs.count);
for(int i = 0; i < legs.count; i++){
stepsArr = [[legs objectAtIndex:i] objectForKey:#"steps"];
for (int i = 0; i < stepsArr.count; i++) {
NSLog(#"HTML INSTRUCTION %#", [[stepsArr objectAtIndex:i] objectForKey:#"html_instructions"]);
NSLog(#"############################");
NSMutableArray *detail=[[stepsArr objectAtIndex:i] objectForKey:#"html_instructions"] ;
}
}
}
}
});
first you go to your .h file -->
#property (nonatomic, strong) NSMutableArray * detailsArray;
In .m file -->
#synthesize detailsArray;
replace this code
NSMutableArray *detail=[[stepsArr objectAtIndex:i] objectForKey:#"html_instructions"] ;
by this -->
self.detailsArray = [[stepsArr objectAtIndex:i] objectForKey:#"html_instructions"];
# using table datasource methods
- (NSInteger)tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section {
return [self.detailsArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.titleLabel.text = [self.detailsArray objectAtIndex: indexPath.row ];
return cell;
}
}
//Note Please set the delegate method of table , if you write the code programmatically means tableView.delgate = self;
Use this :
self.detaisArray = [[NSMutableArray alloc] init];
// Do any additional setup after loading the view, typically from a nib.
NSString *url = [NSString stringWithFormat:#"http://maps.googleapis.com/maps/api/directions/json?origin=%#&destination=%f,%f&sensor=false",startPoint,midannotation.coordinate.latitude,midannotation.coordinate.longitude];
NSURL *googleRequestURL=[NSURL URLWithString:url];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSData* data = [NSData dataWithContentsOfURL: googleRequestURL];
NSString *someString = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
// NSLog(#"data:%#",someString);
NSError* error;
NSMutableDictionary* parsedJson = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSArray *allkeys = [parsedJson allKeys];
for(int i = 0; i < allkeys.count; i++){
if([[allkeys objectAtIndex:i] isEqualToString:#"routes"]){
NSArray *arr = [parsedJson objectForKey:#"routes"];
NSDictionary *dic = [arr objectAtIndex:0];
// NSLog(#"ALL KEYS FROM ROUTE: %#", [dic allKeys]);
NSArray *legs = [dic objectForKey:#"legs"];
// NSLog(#"legs array count %d", legs.count);
for(int i = 0; i < legs.count; i++){
NSArray *stepsArr = [[legs objectAtIndex:i] objectForKey:#"steps"];
for (int i = 0; i < stepsArr.count; i++) {
NSLog(#"HTML INSTRUCTION %#", [[stepsArr objectAtIndex:i] objectForKey:#"html_instructions"]);
NSLog(#"############################");
[self.detaisArray addObject:[[stepsArr objectAtIndex:i] objectForKey:#"html_instructions"] ];
if(i == legs.count-1){
self.myTableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 20, 320, 400) style:UITableViewStylePlain];
self.myTableView.delegate = self;
self.myTableView.dataSource = self;
[self.view addSubview:self.myTableView];
}
}
}
}
}
});

Answer 3

first checked you connect your tableview delegate set self...
second checked youn row count pr detailarray cont in numberOfRowsInSection its may b zero

Answer 4

1st Declare Your Array in .h
like this
#property(strong,nonatomic)NSMutableArray * name;
And intialize into .m Init() method
name=[NSMutableArray alloc]initWithObjects:#"a",#"b", nil];
// TableView Delegate Method To Display Array Data into Tableview.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return name.count; //Give Your Array Name Here.
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.text=[NSString stringWithFormat:#"%#",[name objectAtIndex:indexPath.row]];
return cell;
}
Try this code.