I am parsing data using the NSXMLParser delegate. I know the data is being parsed because I can call upon it in the NSLog. I am having trouble running a conditional statement that compares whether a string equals a certain value.
Here is my code:
NSString *status = [NSString stringWithFormat:#"%#", [attributeDict objectForKey:#"status"]];
NSLog(#"Status: %#", status);
if (status == #"1") {
NSLog(#"Test succeeded!");
}
The NSString 'status' will read '1' in the NSLog, but the if statement above will not be called. Is this a casting problem?
Thank you in advance.
Cheers, Evan.
use isEqualToString function of NSString.
So your code would be like below.
if ([status isEqualToString:#"1"])
{
NSLog(#"Test succeeded!");
}
Read NSString documentation
NSString *status = [NSString stringWithFormat:#"%#", [attributeDict objectForKey:#"status"]];
NSLog(#"Status: %#", status);
if ([status isEqualToString:#"1"] == TRUE) {
NSLog(#"Test succeeded!");
}
More information about NSString
Related
I am writing code in objective-c. I would like to extract a url from a string.
Here is my code:
NSMutableString *oneContent = [[latestPosts objectAtIndex:i] objectForKey:#"content"];
NSLog(#"%#", oneContent);//no problem
NSString *string = #"http";
if ([oneContent rangeOfString:string].location == NSNotFound) {
NSLog(#"string does not contain substring");
} else {
NSLog(#"string contains substring!");
}
As you can see, I want to extract a url from the oneContent string, and I have checked that oneContent definitely contains "http", but why does the result show nothing?
Is there some better way to extract the url?
Check oneContent or the actual code you are running.
This works:
NSMutableString *oneContent = [#"asdhttpqwe" mutableCopy];
NSLog(#"%#", oneContent);//no problem
NSString *string = #"http";
if ([oneContent rangeOfString:string].location == NSNotFound) {
NSLog(#"string does not contain substring");
} else {
NSLog(#"string contains substring!");
}
NSLog output:
Untitled[5911:707] asdhttpqwe
Untitled[5911:707] string contains substring!
It is probably best not to use a Mutable string unless there is some substantial reason to do so.
I would suggest using NSScanner.
Trying to split the string in to array, but it is giving error "[__NSArrayI componentsSeparatedByString:]: unrecognized selector sent to instance 0x11741b20'". The string contains the value, that comes from first index of array then the string needs to be split and store in array.
This is array value.
mcommarr:(
":comment",
":comment",
":comment"
NSString *strr = [[NSString alloc]init];
strr = [self.mCommArr objectAtIndex:indexVal];
NSArray *arr2 = [str componentsSeparatedByString:#","];
Here is the complete method in which i am using this.
-(void)loadData:(int)indexVal;
{
indexVal=serialIndexVal;
serialIndexVal++;
NSLog(#"arrLike:%d", [self.mArrLike count]);
NSLog(#"arrPid:%d", [self.mArrPid count]);
status = [NSString stringWithFormat:#"get"];
[self.mButtonsStatusDict setObject:status forKey:#"status"];
[self.mButtonsPidDict setObject:[self.mArrPid objectAtIndex:indexVal] forKey:#"pid"];
[self.activityIndicator startAnimating];
#try
{
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
dispatch_async(queue, ^{
NSString *status = [NSString stringWithFormat:#"get"];
[self.mButtonsStatusDict setObject:status forKey:#"status"];
[self.mButtonsPidDict setObject:[self.mArrPid objectAtIndex:indexVal] forKey:#"pid"];
self.mButtonsCommentsDict = [MyEventApi showComments:self.mButtonsPidDict];
self.mButtonsDict = [MyEventApi likeDislike:self.mButtonsUidDict post:self.mButtonsPidDict postStatus:self.mButtonsStatusDict];
dispatch_sync(dispatch_get_main_queue(), ^{
[self.activityIndicator stopAnimating];
NSLog(#"buttons data dict:%#", self.mButtonsDict);
if([self.mButtonsDict count] == 0)
{
NSLog(#"server problem no response");
[self.mArrLike addObject: #"0"];
[self.mArrDislike addObject: #"0"];
}else{
[self.mArrLike addObject: [self.mButtonsDict valueForKey:#"like"]];
[self.mArrDislike addObject: [self.mButtonsDict valueForKey:#"dislike"]];
}
if([self.mButtonsCommentsDict count] == 0)
{
NSLog(#"server problem no response");
[self.mCommArrTot addObject: #"0"];
}
else{
self.dictComm = [self.mButtonsCommentsDict valueForKey:#"comments"];
[self.mCommArr addObject:[self.dictComm valueForKey:#"comment"]];
NSLog(#"count:%d",[self.mCommArr count]);
// NSString *strTot = [NSString stringWithFormat:#"%d",tot];
// [self.mCommArrTot addObject:strTot];
NSLog(#"dictcomm:%#", self.dictComm );
NSLog(#"mcommarr:%#", [self.mCommArr objectAtIndex:indexVal]);
strr = [[NSString alloc]init];
strr = [self.mCommArr objectAtIndex:indexVal];
//NSString *strr = [[NSString stringWithFormat:#"%#", [self.mCommArr objectAtIndex:indexVal]];
// NSArray *arr1 = [self string:strr];
// NSArray *splitArray=[self.mCommArr[0] componentsSeparatedByString:#","];
//[strr componentsSeparatedByString:#","];
// NSLog(#"arrSep:%#", arr1);
//int count = [arr1 count];
//NSLog(#"arrcount:%d", count);
// NSString *strTot = [NSString stringWithFormat:#"%d",count];
// [self.mCommArrTot addObject:strTot];
//NSLog(#"mcommarrtot:%#", [self.mCommArrTot objectAtIndex:indexVal]);
}
// NSLog(#"arrLike:%#", [self.mArrLike objectAtIndex:indexVal]);
// NSLog(#"arrDisLike:%#", [self.mArrLike objectAtIndex:indexVal]);
[self.mPublicFriendTable reloadData];
});
});
}
#catch (NSException *exception) {
NSLog(#"main: Caught %#: %#", [exception name], [exception reason]);
}
#finally {
}
}
It get killed when try to split. Why so, i am not getting. If anyone has faced such situation please guide what is wrong her.
You can split the string into an NSArray like below...
NSString *yourString = #"comment,comment,comment";
NSArray *strArray = [yourString componentsSeparatedByString:#","];
NSLog(#"\n\n Array is ==>> %#",strArray);
"[__NSArrayI componentsSeparatedByString:]:
Your error says you tried to send the above method to NSArray, which doesn't has.
As you want to split the array at index 0. you should probably do as :
NSArray *splitArray=[yourArray[0] componentsSeparatedByString:#","];
Here yourArray is the array that you get from Server.
NSString *strr = [[NSString stringWithFormat:#"%#", [self.mCommArr objectAtIndex:indexVal]];
NSArray *arr2 = [strr componentsSeparatedByString:#","];
I think you are passing str right now, which can be an array (as your error points out).
Let me know the results.
I get a Sigabrt at the NSlog and i have no idea why - any suggestions?
NSString* contentList = [NSString stringWithContentsOfFile:currentFilePath encoding:NSUTF8StringEncoding error:nil];
NSArray* contentArray = [contentList componentsSeparatedByString:#"$$"];
NSLog(#"%#%#",contentList,[contentArray count]);
kunden = [contentArray objectAtIndex:0];
kundenView.text = kunden;
Following Joes suggestions, I now got:
NSString* contentList = [NSString stringWithContentsOfFile:currentFilePath encoding:NSUTF8StringEncoding error:nil];
NSArray* contentArray = [[contentList componentsSeparatedByString:#"$$"] retain];
if ([contentArray count] > 0) {
NSLog(#"%#%#",contentList,[contentArray count]);
kunden = [contentArray objectAtIndex:0];
kundenView.text = kunden;
}
Which gives me an EXC_BAD_ACCESS at the NSLog thing.
I get a Sigabrt at the NSlog
Your NSLog statement is trying to print an integer as if it was an object:
NSLog(#"%#%#",contentList,[contentArray count]);
^
Here!
Replace %# with %d.
You can read more on format specifiers in the String Programming Guide.
You are not checking to make sure you have at least 1 element in your array. Accessing [contentArray objectAtIndex:0] will be an issue if the contentArray is empty.
I have a logical condition that does not work. it would compare two characters, one taken from the xml and the other I insert myself.
to let you know I am attaching below the code
NSString *telefono = [NSString stringWithFormat:#"%#", [[arrayColonnine objectAtIndex:indexPath.row]objectForKey:#"telefono"]];
NSString *trimmedTelefono = [telefono stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
senzaTelefono = [[NSString alloc] initWithString:[trimmedTelefono stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
if (telefono == #"NO")
if (trimmedTelefono == #"NO")
if (senzaTelefono == #"NO")
for each of the three strings if I do a log it print NO. but in none of the three cases the if works. how can I fix to make it work?
SOLUTION
the process is just this:
NSString *telefono = [NSString stringWithFormat:#"%#", [[arrayColonnine objectAtIndex:indexPath.row]objectForKey:#"telefono"]];
NSString *trimmedTelefono = [telefono stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
if ([trimmedTelefono isEqualToString:#"NO"]) {
//do something...
}
You should use isEqualToString:
if ([telefono isEqualToString:#"NO"])
if (telefono == #"NO") compares the objects being the same, not the contents being the same.
Don't use == to compare NSString objects.
I'm using MGTWitterEngine and I cannot figure out why my dictionary items are returning null.
I have this method:
- (void)searchResultsReceived:(NSArray *)searchResults forRequest:(NSString *)connectionIdentifier{
NSDictionary *result = [searchResults objectAtIndex:0];
NSString *fromUser = [result valueForKey:#"from_user"];
NSLog(#"from user: %#", fromUser);
}
And for some reason, my NSLog always displays "from user: NULL". I can do an NSLog of searchResults which dumps the contents of the search correctly, but I can't figure out how to parse the information. Any help would be greatly appreciated.
Look at this question: Parsing Search Result with MGTwitterEngine in Objective C
They use:
- (void)searchResultsReceived:(NSArray *)searchResults
forRequest:(NSString *)connectionIdentifier
{
if ([searchResults count] > 0)
{
NSDictionary *result = [searchResults objectAtIndex:0];
NSString *fromUser = [result valueForKey:#"from_user"];
NSString *fromUserID = [result valueForKey#"from_user_id"];
// ...
NSString *text = [result valueForKey#"text"];
NSLog(#"User %#(%#): %#", fromUser, fromUserID, text);
}
}
It is similar to your code with a check on searchResults count.