hi all how to appends total data to NSMutableString what i am getting data from the
Webservices *details=[[Webservices alloc] init];
[details getMobileNumberDetails:phnotextfield.text];
NSLog(#"longitudes Arrays from %#",details.resultData);
"-91.57696007",
"10.343234",
"74.982343",
"76.464844",
"76.464844",
"2.256",
so help me to store the data into NSMutableString by using for loop in iphone.
thanq for your replaying my another problem is i have to store all data from nsmutablestring into float values. according to your ans, when convert the nsmutablestring values into float as like
float datalist= [ myStr floatValue]; it showing 0.000 value. how to store the total result into float values in iphone
try this code
NSString *XMLStr = [[NSString alloc]initWithBytes:[webData mutableBytes] length:[webData length]encoding:NSUTF8StringEncoding ];
NSLog(#"the xml product is %#",XMLStr);
Use this code i hope it helps You.
I am assuming that tge array has NSNumber objects,
NSMutableString *myStr = [[NSMutableString alloc] init];
for (NSNumber *temp in details.resultData) {
[myStr appendString:#"\""];
[myStr appendFormat:#"%f", temp.floatValue];
[myStr appendFormat:#"\","];
}
Related
My brain is fried! I can't think.
i am new to iphone programming
am doing json parsing ....in that am storeing data from json to nsdictionary but .......
I want to add all nsdictionary float values from the dictionary to the array. This is what I am doing right now.As code below:
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
[connection release];
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
self.responseData = nil;
dict = [responseString JSONValue];
NSMutableArray *array = [NSMutableArray array];
for (NSString *key in [dict allKeys])
{
array = [dict objectForKey:key];
// array return float values but
[array addObject:array ]; // geting carsh dude to array return float values like 120.01
}
Please guide me i am not getting a part where i am doing a mistake.
Thanks in advance.
Your app is crashing because you are adding data to NSArray , this is static array, you can not add value at run time, so just Make NSMutableArray and add your data in NSMutableArray.
Your code is broken in a couple of ways.
This line assigns the array pointer to the object in the dictionary:
array = [dict objectForKey:key];
Then you are trying to add the array to itself, which does not make sense. But worse, since array does no longer point to your NSMutableArray you cannot even call that method.
[array addObject:array ];
You probably wanted to do something like this:
for (NSString *key in [dict allKeys])
{
id value = [dict objectForKey:key];
[array addObject:value];
}
I am currently creating this NSData object. I would like to put in sever different objects that are of type NSString and UInt32. I know how to put a NSString into my NSData object, but I don't know how to do this with a UInt32 scalar type.
this is how I do it with a NSString
- (void) constructRequest
{
NSString *mystring = [[NSString alloc] initWithString:[self addMethodName]];
UInt32 protocolInt = [self addProtocolVersion];
NSData* data=[mystring dataUsingEncoding:NSUTF8StringEncoding];
[data writeToFile:#"/Users/imac/Desktop/_dataDump.dat" atomically:YES];
}
So I have figured it out, and instead of just updating my question I will put in the answer so others can see that this question has been answered if they are looking to do something similar.
code is as follows
- (void) constructRequest
{
//NSString *mystring = [[NSString alloc] initWithString:[self addMethodName]];
UInt32 protocolInt = [self addProt];
NSData * data = [[NSData alloc] initWithBytes:&protocolInt length:sizeof(protocolInt)];
//NSData* data=[mystring dataUsingEncoding:NSUTF8StringEncoding];
[data writeToFile:#"/Users/imac/Desktop/_dataDump.dat" atomically:YES];
}
Does it need to be NSData? You could use NSString or NSNumber (both can be saved in a property list).
Your scheme doesn't really distinguish between a 4-byte string and a UInt32, if that matters.
You can use htonl(),htons(), ntohl() and ntohs() to make it endian-safe.
htonl()--"Host to Network Long int" 32Bytes
ntohl()--"Network to Host Long int" 32Bytes
htons()--"Host to Network Short int" 16Bytes
ntohs()--"Network to Host Short int" 16Bytes
Example:
- (void)testExample {
UInt32 length = 0x1a2b3c4d;
NSLog(#"%x", length);
length = htonl(length);
NSLog(#"%x", length);
NSMutableData *data = [[NSMutableData alloc] init];
[data appendBytes:&length length:4];
NSLog(#"%#", data);
}
print:
2015-10-29 15:46:49.224 UPHTTP-iOS[3896:101301] 1a2b3c4d
2015-10-29 15:46:49.224 UPHTTP-iOS[3896:101301] 4d3c2b1a
2015-10-29 15:46:49.224 UPHTTP-iOS[3896:101301] <1a2b3c4d>
I am trying to pars the json data and display in table
My JSON data is like this
{"isError":false,"ErrorMessage":"","Result":{"Count":4,"Data":[{"ContentID":"127_30_1309793318065","ContentTypeID":1,"UserCaption":"Gandhinagar(Kanjurmarg)","UserComment":"central\n","DateRecorded":"\/Date(1309793318000+0530)\/","Data":"","ShareType":true,"Views":0,"PlayTime},{},{},{}];};isError = 0;}
I am prasing like this
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSString *loginStatus = [[NSString alloc] initWithBytes: [webData mutableBytes] length:[webData length] encoding:NSUTF8StringEncoding];
NSLog(#"%#",loginStatus);
//this is for the getting the data from the server with help of JSON
NSString *json_string = [[NSString alloc] initWithData:webData encoding:NSUTF8StringEncoding];
NSDictionary *result = [json_string JSONValue];
/
//this for holding the Array value which come from the server
NSMutableArray *results = [[NSMutableArray alloc] init];
for (int index = 0; index<[reviewsvalues count]; index++)
{
NSMutableDictionary * value = [reviewsvalues objectAtIndex:index];
ReviewsResult * result = [[ReviewsResult alloc] init];
result.User_Caption = [value objectForKey:#"UserCaption"];
result.ContentType_Id = [value objectForKey:#"DateRecorded"];
result.Average_Rating = [value objectForKey:#"AverageRating"];
//OVER here MY APP GET CRASH
}
}
BUt it get crash and give error
[__NSCFDictionary objectAtIndex:]: unrecognized selector sent to instance
The problem is simple.
reviewsvalues should be an NSDictionary and you should not be calling objectAtIndex: for the reviewsvalues.
Instead you should call valueForKey like
int count = [[reviewsvalues valueForKey:#"Count"] intValue];
NSArray *reviewsArray = [reviewsvalues valueForKey:#"Data"];
int count = [reviewsArray count];
cell.textLabel.text = [[reviewsArray objectAtIndex:indexPath.row] valueForKey:#"ContentID"];
Hope this helps you.
Please let me know if you want more help on this.
You set reviewsvalues = [result objectForKey:#"Result"];
Which means reviewsvalues is now an NSDictionary.
"Result" is a dictionary, not an array:
{"Count":4,"Data":[...]}
NSDictionary doesn't respond to -objectAtIndex:, that's one of NSArray's methods.
You need another step:
NSArray *reviewsArray = [reviewsvalues objectForKey:#"Data"];
and while you are at it, you can use fast enumeration.
for (NSDictionary *review in reviewsArray) {
ReviewsResult * result = [[ReviewsResult alloc] init];
result.User_Caption = [review objectForKey:#"UserCaption"];
result.ContentType_Id = [review objectForKey:#"DateRecorded"];
result.Average_Rating = [review objectForKey:#"AverageRating"];
}
Edit: also, you should know that you've not coded this very defensively. What happens if the data isn't exactly as it is in your example? what happens if a value is missing, like "Data", or "Result"?
Your app should be robust enough to not choke if something slightly unexpected happens.
I am trying to build a small table using NSString. I cannot seem to format the strings properly.
Here is what I have
[NSString stringWithFormat:#"%8#: %.6f",e,v]
where e is an NSString from somewhere else, and v is a float.
What I want is output something like this:
Grapes: 20.3
Pomegranates: 2.5
Oranges: 15.1
What I get is
Grapes:20.3
Pomegranates:2.5
Oranges:15.1
How can I fix my format to do something like this?
you could try using - stringByPaddingToLength:withString:startingAtIndex:
NSDictionary* fruits = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithFloat:20.3], #"Grapes",
[NSNumber numberWithFloat:2.5], #"Pomegranates",
[NSNumber numberWithFloat:15.1], #"Oranges",
nil];
NSUInteger longestNameLength = 0;
for (NSString* key in [fruits allKeys])
{
NSUInteger keyLength = [key length];
if (keyLength > longestNameLength)
{
longestNameLength = keyLength;
}
}
for (NSString* key in [fruits allKeys])
{
NSUInteger keyLength = [key length];
NSNumber* object = [fruits objectForKey:key];
NSUInteger padding = longestNameLength - keyLength + 1;
NSLog(#"%#", [NSString stringWithFormat:#"%#:%*s%5.2f", key, padding, " ", [object floatValue]]);
}
Output:
Oranges: 15.10
Pomegranates: 2.50
Grapes: 20.30
The NSNumberFormatter class is the way to go!
Example:
NSNumberFormatter *numFormatter = [[NSNumberFormatter alloc] init];
[numFormatter setPaddingCharacter:#"0"];
[numFormatter setFormatWidth:2];
NSString *paddedString = [numFormatter stringFromNumber:[NSNumber numberWithInteger:integer]];
[numFormatter release];
I think you want something like
[NSString stringWithFormat:#"%-9# %6.1f",[e stringByAppendingString:#":"],v]
since you want padding in front of the float to make it fit the column, though if the NSString is longer than 8, it will break the columns.
%-8f left-aligns the string in a 9-character-wide column (9-wide since the : is appended to the string beforehand, which is done so the : is at the end of the string, not after padding spaces); %6.1f right-aligns the float in a 6-char field with 1 decimal place.
edit: also, if you're viewing the output as if it were HTML (through some sort of web view, for instance), that may be reducing any instances of more than one space to a single space.
I'm getting an HTML file as NSData and need to extract some parts of it. For that I need to convert it to NSString with UTF8 encoding. The thing is that this conversion fails, probably because the NSData contains bytes that are invalid for UTF8. I have tried to get the byte array of the data and go over it, but each time I come across non ASCII character (hebrew letters for example) I get jibrish.
Help will be appreciated.
UPDATE:
To Gordon - the NSData generated like that:
NSData *theData = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&theResponse error:&theError];
When I say that the conversion fails I mean that
[[NSString alloc] initWithData:temp encoding:NSUTF8StringEncoding]
returns nil
To Ed - Here is my code (I got the Byte array from NSData, found what I need, and constructed another Byte array from that - turned it to NSData and then attempted to convert it to NSString... sounds kinda complicated...)
-(NSString *)UTF8StringFromData:(NSData *)theData{
Byte *arr = [theData bytes];
NSUInteger begin1 = [self findIndexOf:#"<li>" bArr:arr size:[theData length]]+4;
NSUInteger end1 = [self findIndexOf:#"</li></ol>" bArr:arr size:[theData length]];
Byte *arr1 = (Byte *)malloc(sizeof(Byte)*((end1-begin1+1)));
NSLog(#"%d %d",begin1, end1);
int j = 0;
for (int i = begin1; i < end1; i++){
arr1[j] = arr[i];
j++;
}
arr1[j]='\0';
NSData *temp = [NSData dataWithBytes:arr1 length:j];
return [[NSString alloc] initWithData:temp encoding:NSUTF8StringEncoding];
}
I know this is an old topic but it came up when I was looking for the solution today. I've solved it now so I'm just posting it for others who might run into this page looking for a solution.
Here's what I do in an asynchronous request:
I first store the text encoding name in connection:didReceiveResponse using
encodingName = [[NSString alloc] initWithString:[response textEncodingName]];
Then later in my connectionDidFinishLoading method I used
NSStringEncoding encoding = CFStringConvertEncodingToNSStringEncoding(CFStringConvertIANACharSetNameToEncoding((CFStringRef) encodingName));
NSString *payloadAsString = [[NSString alloc] initWithData:receivedData encoding:encoding];
To Gordon - the NSData generated like that:
NSData *theData = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&theResponse error:&theError];
When I say that the conversion fails I mean that
[[NSString alloc] initWithData:temp encoding:NSUTF8StringEncoding]
returns nil
To Ed - Here is my code (I got the Byte array from NSData, found what I need, and constructed another Byte array from that - turned it to NSData and then attempted to convert it to NSString... sounds kinda complicated...)
-(NSString *)UTF8StringFromData:(NSData *)theData{
Byte *arr = [theData bytes];
NSUInteger begin1 = [self findIndexOf:#"<li>" bArr:arr size:[theData length]]+4;
NSUInteger end1 = [self findIndexOf:#"</li></ol>" bArr:arr size:[theData length]];
Byte *arr1 = (Byte *)malloc(sizeof(Byte)*((end1-begin1+1)));
NSLog(#"%d %d",begin1, end1);
int j = 0;
for (int i = begin1; i < end1; i++){
arr1[j] = arr[i];
j++;
}
arr1[j]='\0';
NSData *temp = [NSData dataWithBytes:arr1 length:j];
return [[NSString alloc] initWithData:temp encoding:NSUTF8StringEncoding];
}
have you checked the charset= in the HTTP headers and/or the document itself? The most likely reason for the conversion to fail is because the bytes don't represent a valid UTF-8 string.
I'm not sure if you're aware, you don't really need to copy the array to another array before putting it into the new NSData object.
-(NSString *)UTF8StringFromData:(NSData *)theData {
Byte *arr = [theData bytes];
NSUInteger begin1 = [self findIndexOf:#"<li>" bArr:arr size:[theData length]]+4;
NSUInteger end1 = [self findIndexOf:#"</li></ol>" bArr:arr size:[theData length]];
Byte *arr1 = arr + begin1;
NSData *temp = [NSData dataWithBytes:arr1 length:end1 - begin1];
return [[NSString alloc] initWithData:temp encoding:NSUTF8StringEncoding];
}
As for your particular problem, I would try looking through the data manually using the debugger. Put a breakpoint after you have your array (arr1). When you hit it, open up the GDB console and try this:
print (char *)arr1
With your code, it should print out the string you're trying to get. (With the code I gave above, it won't stop after the . It'll just keep going).
If the result is not what you expect, then there's something wrong with the data, or perhaps with your begin1 and end1 boundaries.