i am new in iphone prog...
i am using UITextView to view my data from database...
my app is showing high scores from database.... i stored every row of data in a dictionary and then this dictionary in an array...
then i did reverse of that here....
here nextclass is object of that class where the actual method of select command is......
and highscore is my textview
NSArray *scores = [nextclass score];
NSMutableDictionary *DD;
int a = [scores count];
while(a>0)
{
DD=[scores objectAtIndex:a-1];
highscore.text=[NSString stringWithFormat:#"%# -------------------------- %#",[DD objectForKey:#"name"],[DD objectForKey:#"score"]];
a--;
}
the problem is that it replaces the data which was previously added to the textview.....
but i want to show the whole data row by row
waiting for your response......
please help.....
highscore.text=[NSString stringWithFormat:#"%#%# -------------------------- %#",highscore.text, [DD objectForKey:#"name"],[DD objectForKey:#"score"]];
is one option, also you could use the method
stringByAppendingString
Related
I am parsing an XML file from a URL, from this XML I parse titles of events, their dates, and locations of the events among other things. These elements are cached in an array called stories which acts as my data source for my table view. My goal is to display and indexed UITableView with the sections based on the date at which my events take place by month (January's events in a section, February's events in another, with month names as the titles for my sections). The events that will take place soonest will be at the top of my view, events further out should be at the bottom of my list, I don't have to worry about events that have already taken place. So far I've been able to display my event names and their dates as subtitles in my UITableView not sorted or indexed, left in the order by which they were parsed. When I log the stories array I view this in the console:
2013-01-04 00:17:22.332 NumberTwo[72213:c07] the stories array is as follows: (
{
additionalDesc = "";
allday = "Yes.";
endtime = "11:55 PM";
isodate = "2013-05-23";
location = "";
starttime = "12:00 AM";
title = "CST Exam Makeups";
},
{
additionalDesc = "";
allday = "No.";
endtime = "12:00 PM";
isodate = "2013-06-01";
location = "";
starttime = "8:00 AM";
title = "SAT & Subject Tests";
},)
There is an example of two elements in the array, I understand I am going to have break down the stories array into smaller ones based on the month that the events occur but I don't know what that method would look like. Here's my attempt at it in the viewDidLoad.
- (void)viewDidLoad {
[super viewDidLoad];
self.sections = [NSMutableDictionary dictionary];
for (UIEvent *event in stories)
{
NSDate *dateRepresentingThisDay = tempDate;
// If we don't yet have an array to hold the events for this day, create one
NSMutableArray *eventsOnThisDay = [self.sections objectForKey:dateRepresentingThisDay];
if (eventsOnThisDay == nil) {
eventsOnThisDay = [NSMutableArray array];
}
// Add the event to the list for this day
[eventsOnThisDay addObject:event];
}
// Create a sorted list of days
NSArray *unsortedDays = [self.sections allKeys];
self.sortedDays = [unsortedDays sortedArrayUsingSelector:#selector(compare:)];
}
I know the line for (UIEvent *event in stories) must be incorrect but I'm sure what should replace it. tempDate is a formatted date I receive from an NSDateFormatter in another method, and event is meant to refer to an element in my array stories. If you could, point me in the right direction to accomplish my goal, it would be much appreciated. Thank You.
For this you have to use the following steps:
1. On the number of section method of table view write the array count.
2. you also have to modify your array by comparing the dates which are available on stack overflow and arrange in array according to your requirement.
3. Set title by giving title.text = [your array object at index[index path of section]]
4. Now you can give rows as you like in it.
This are just steps you need to follow..
Have you got what I mean to say?
Is it possible for you create a class for the above data and have NSDate property to represent your start date/time of the event? If so, you can make use of NSPredicate to sort the array based on your start date property. You can find details on NSPredicate on this link.
I am doing an NSLog of an array but instead of data it shows the following values. I do not know how to fix this issue and get the values from the array
if(!surveyQuestions){
surveyQuestions=[[NSMutableArray alloc]init];
}
Total Survey Questions 3
2012-07-31 08:54:53.555 SQL[442:9203] SurveyQuestions (
"<QuestionData: 0x4da10f0>",
"<QuestionData: 0x4b9f120>",
"<QuestionData: 0x4ba42e0>"
)
I'm not sure what you're trying to do but: it's certain that the poor array object has no idea what and how your own custom class does, its best possibility to print an instance of your class is to call its description method, which you see, and which is not really helpful. You maybe want to do two things:
I. If you only want to print your objects like this, override the description method of your class and use some format string (given that you haven't written a single line of code I have to fall back to guess):
- (NSString *)description
{
return [NSString stringWithFormat:#"Name: %#, address: %#", self.name, self.address];
}
II. If you want to use the data of your class elsewhere, you probably want to loop through its properties manually:
for (QuestionData *d in surveyQuestions)
{
NSLog(#"%#", d.name);
// etc.
}
You need to do something like this:
NSArray *theArray = [[NSArray alloc] initWith...];
NSLog(#"array contents: %#", theArray);
I have recently started programming for the iOS Platform but now I need some help figuring out how to do 'something':
For my application I fetch some JSON data and put this data as objects into an Array
This Array is written to my own PLIST file (in the docs directory)
Now when the users starts a sync action I:
Fetch the data from the PLIST
Get the timestamp for a certain object in the Array that came from the PLIST
Use timestamp in new JSON request (for the new data)
So far so good.
Now for my (current) problem -> After receiving the new data (JSON req) I wish to update the timestamp of this 'certain' object in the array (and write this to the Plist).
Using an NSPredicate I am able to find the right set of data within the main Array (stampArr).
NSString *documentsDir = [NSHomeDirectory()stringByAppendingPathComponent:#"Documents"];
NSString *plistPath = [documentsDir stringByAppendingPathComponent:#"stamps.plist"];
NSMutableArray *stampArr = [[NSMutableArray alloc] initWithContentsOfFile:plistPath];
NSPredicate *filter = [NSPredicate predicateWithFormat:#"eventid = 1"];
NSMutableArray *filteredStampArr = [stampArr filteredArrayUsingPredicate:filter];
But now, after I update the filteredStampArr, I want to update the main Array with the data from the filtered Array.
In other words, I need to update the object from the Array with the new 'timestamp' (field of object).
I could off course use something like [stampArr addObject: [filteredStampArr copy]] after changing the filterd array but that would just create a duplicate of the information. I wish to overwrite the original object.
Somehow (I think) I need a 'pointer' that tells me the location of the data in the original array so that I can change the data directly in the main array?
(I hope my questions is clear - If not please say so)
Get the item, find it's index in stampArr and replace it with the newItem.
NSArray *filteredStampArr = [stampArr filteredArrayUsingPredicate:filter];
id item = [filteredStampArr objectAtIndex:0]; // id because the type of the item is not known
NSUInteger itemIndex = [stampArr indexOfObject:item];
[stampArr replaceObjectAtIndex:itemIndex withObject:newItem];
When you get filteredArray, you can directly update objects in it (not replace) and thay willbe uopdated in main array.
Read the API carefully!
try:
[stampArr filterUsingPredicate:];
I have stored data in an array from XML Parsing. In the array I have stored latitude and longitude of the start and end point. Now I want to show the value of lat and long in the table view's cell.text. How can I access this? What syntax do I use so that I show the value of the element stored in the array? When I print to console it shows that the array has 12 objects. The values stored in the array are:
araystp= (
Step: 0x563f160,
Step: 0x563f860,
Step: 0x56400d0,
Step: 0x56408e0,
Step: 0x56410f0,
Step: 0x5641990,
Step: 0x5642290,
Step: 0x5642ae0,
Step: 0x56434a0,
Step: 0x5643e80,
Step: 0x56446f0,
Sleg: 0x5623850
)
suppose u have use array in XML file is listofPoint in which u have add your class's object.Now u synthesize a NSMutableArray in app delegate file. And where you are doing parsing event there after completion of parsing make copy of array listofPoint to appdelegate array. and in next class define object of class which you have add in listofPoint array. And use this syntax.
yourclass *Object=[[yourclass alloc]init];
Object=[appDelegate.Array objectAtIndex:0];
NSLog(#"%f",Object.var);
it will work.
Following is the code to get stored value from your xml calss.
for (int i = 0 ; i <[array count];i++)
{
XmlClass *class1 = (XmlClass*) [array objectAtIndex:i];
NSString *strLat = class1.latitude;
NSString *strLong = class1.longitude;
}
for (int i = 0 ; i <[array count];i++)
{
YourXmlClass *x = [array objectAtIndex:i]
NSString *s = x.latitude;
NSString *s1 = x.longitude;
}
I´m using Core Data as local storage in my app. I´ve set it up properly and made subclasses of NSManagedObject for each entity. However, when I´m trying to insert values into my store, it only inserts the last object from my JSON feed.
res = [JSONHandler requestJSONResponse:jsonString];
shows = [res valueForKeyPath:#"Show.Name"];
NSUInteger showIndex = 0;
for(NSString *showName in shows){
showObject = [NSEntityDescription insertNewObjectForEntityForName:#"Show" inManagedObjectContext:managedObjectContext_];
showObject.name = showName;
showObject.iD = [[res valueForKeyPath:#"Show.Id"]objectAtIndex:showIndex];
showObject.desc = [[res valueForKeyPath:#"Show.Description"]objectAtIndex:showIndex];
showObject.activityType = [[res valueForKeyPath:#"Show.ActivityType"]objectAtIndex:showIndex];
showIndex++;
}
This only stores the last object from my JSON feed. Any idea why?
EDIT: It works fine when I do this:
res = [JSONHandler requestJSONResponse:jsonString];
shows = [res valueForKeyPath:#"Show.Name"];
NSUInteger index = 0;
for(NSString *showName in shows){
show = [NSEntityDescription insertNewObjectForEntityForName:#"Show" inManagedObjectContext:managedObjectContext_];
[show setValue:showName forKey:#"name"];
[show setValue:[[res valueForKeyPath:#"Show.Id"]objectAtIndex:index] forKey:#"iD"];
[show setValue:[[res valueForKeyPath:#"Show.Description"]objectAtIndex:index] forKey:#"desc"];
[show setValue:[[res valueForKeyPath:#"Show.ActivityType"]objectAtIndex:index] forKey:#"activityType"];
index++;
}
It´s basically the same thing, isn´t it? But I want to use subclasses of NSManagedObject instead of doing like I did above. Because in the snippet above show is NSManagedObject *show instead of what it should be: Show *show.
How many shows are there? You can find this by doing: NSLog(#"Number of shows: %d.", shows.count);, assuming that shows is an NSArray. It could be that your Core Data code is fine and the JSON parsing itself is at fault.
EDIT: Also, are you correctly saving the changes to the persistent store?
Usually when you see just one of several objects being saved like this, the problem is that a relationship that should be to-many is improperly set as to-one. No matter how many objects you try to add to the relationship, only the last one is set because the relationship can hold only one value.
I think in this circumstance the problem is most likely in the code of the custom subclass instead of the data model itself given that the data model works with generic NSManagedObjects.