I'm having an issue with the following code. I want the resultant multiLineTitle to look like this
Each
Word
Should
Have
Its
Own
Line
But when I run this program, multiLineTitle ends up null. Can anyone spot the issue?
NSString *title = "Each Word Should Have Its Own Line";
NSString *multiLineTitle;
NSArray *words = [title componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
words = [words filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:#"SELF != ''"]];
for (int len = 0; len < [words count]; len++){
multiLineTitle = [multiLineTitle stringByAppendingFormat:#"%# \n", words[len]];
}
assign empty string to multiLineTitle or allocate memory for multiLineTitle.
NSString *multiLineTitle = #"";
or
NSString *multiLineTitle = [[NSString alloc]init];
solution....
NSString *title =#"Each Word Should Have Its Own Line";
NSMutableString *multiLineTitle =[[NSMutableString alloc] init];
NSArray *words = [title componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
words = [words filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:#"SELF != ''"]];
for (int len = 0; len < [words count]; len++){
[multiLineTitle appendFormat:#"%#\n",[words objectAtIndex:len]];
}
NSLog(#"multiLineTitle:%#",multiLineTitle);
ans:
multiLineTitle:Each
Word
Should
Have
Its
Own
Line
Related
I'm using objective-c to parse a sentence here:
NSString *myString = #“Some words to form a string”;
Here is what I have so far:
NSMutableString *firstCharacters = [NSMutableString string];
NSMutableString *lastCharacters = [myString substringFromIndex:[myString length] - 1]
NSArray *arrayOfWords = [myString componentsSeparatedByString:[NSCharacterSet whitespaceCharacterSet]];
for (NSString *word in arrayOfWords) {
if ([word length] > 0) {
NSString *firstLetter = [word substringToIndex:1];
[firstCharacters appendString:lastCharacters];
and then I am really stumped at this point. I want to NSLog the recombined string so that it looks like this:
"S2e w3s to f2m a s3g"
Please try following code :
NSString *myString = #"Some words to form a string";
NSArray *wordsInSentence = [myString componentsSeparatedByString:#" "];
NSMutableArray *expectedResultArray = [[NSMutableArray alloc] init];
for (NSString *word in wordsInSentence) {
NSString *finalExpectedString = word;
if (word.length > 2) {
NSString *firstLetterInWord = [word substringToIndex:1];
NSString *lastLetterInWord = [word substringFromIndex:[word length] - 1];
finalExpectedString = [NSString stringWithFormat:#"%#%d%#", firstLetterInWord, (int)word.length - 2, lastLetterInWord];
}
[expectedResultArray addObject:finalExpectedString];
}
NSString *printString = [expectedResultArray componentsJoinedByString:#" "];
NSLog(#"Result : %#", printString);
I want to make a method which gives reverse of string.suppose I pass a NSString "Welcome to Objective C" in method and that method return a reverse of string like "C Objective to Welcome" not "C evitcejbO ot emocleW" without the use of componentsSeparatedByString method.
Is it possible to do with Objective c..?
Please help.
You can enumerate strings by words.
NSString *string = #"Welcome to Objective-C!";
NSMutableArray *words = [NSMutableArray array];
[string enumerateLinguisticTagsInRange:NSMakeRange(0, [string length])
scheme:NSLinguisticTagSchemeTokenType
options:0
orthography:nil
usingBlock:^(NSString *tag, NSRange tokenRange, NSRange sentenceRange, BOOL *stop) {
[array addObject:[string substringWithRange:tokenRange]];
}];
NSMutableString *reverseString = [[NSMutableString alloc] init];
for (NSString *word in [words reverseObjectEnumerator]){
[reverse appendString:word];
}
NSLog(#"%#", reverseString);
This will print...
"!C-Objective to Welcome"
You can change the options to omit whitespaces and stuff...
I used below method for reversing string in iOS
- (NSString *)reverseString:(NSString *)stringToReverse
{
NSMutableString *reversedString = [NSMutableString stringWithCapacity:[stringToReverse length]];
[stringToReverse enumerateSubstringsInRange:NSMakeRange(0, [stringToReverse length])
options:(NSStringEnumerationReverse | NSStringEnumerationByComposedCharacterSequences)
usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
[reversedString appendString:substring];
}];
return reversedString;
}
Sorry I misread your question earlier. I did it using a series of loops, my answer is messier than Fogmeister but I wanted to give it a shot to see if I could do it.
NSString *str = #"This is a test";
NSMutableArray *array = [[NSMutableArray alloc] init];
for(int i = 0; i < [str length]; i++)
{
char sTest = [str characterAtIndex:i];
if(sTest == ' ')
{
[array addObject:[NSNumber numberWithInt:i]];
}
}
NSInteger iNext = [[array objectAtIndex:[array count]-1] integerValue];
iNext+=1;
if(iNext < [str length])
{
[array addObject:[NSNumber numberWithInt:iNext]];
}
NSMutableArray *wordArray = [[NSMutableArray alloc] init];
for(int i = 0; i < [array count]; i++)
{
if (i == 0)
{
int num = [[array objectAtIndex:i] integerValue];
NSString *s = [[str substringFromIndex:0] substringToIndex:num];
[wordArray addObject:s];
}
else if(i == [array count]-1)
{
int prev = [[array objectAtIndex:i-1] integerValue]+1;
int num = [str length];
NSString *s = [[str substringToIndex:num] substringFromIndex:prev];
[wordArray addObject:s];
}
else
{
int prev = [[array objectAtIndex:i-1] integerValue]+1;
int num = [[array objectAtIndex:i] integerValue];
NSString *s = [[str substringToIndex:num] substringFromIndex:prev];
[wordArray addObject:s];
}
}
NSMutableArray *reverseArray = [[NSMutableArray alloc]init];
for(int i = [wordArray count]-1; i >= 0; i--)
{
[reverseArray addObject:[wordArray objectAtIndex:i]];
}
NSLog(#"%#", reverseArray);
Here i have done with replacing character with minimal number of looping. log(n/2).
NSString *string=#"Happy World";
NSInteger lenth=[string length];
NSInteger halfLength=[string length]/2;
for(int i=0;i<halfLength;i++)
{
NSString *leftString=[NSString stringWithFormat:#"%c",[string characterAtIndex:i]];
NSString *rightString=[NSString stringWithFormat:#"%c",[string characterAtIndex:(lenth-i-1)]];
string= [string stringByReplacingCharactersInRange:NSMakeRange(i, 1) withString:rightString];
string=[string stringByReplacingCharactersInRange:NSMakeRange((lenth-i-1), 1) withString:leftString];
}
NSLog(#"%#",string);
Try This , It's working perfect as per your expectation ,
Call Function :-
[self reversedString:#"iOS"];
Revers String Function :-
-(void)reversedString :(NSString *)reversStr
{ // reversStr is "iOS"
NSMutableString *reversedString = [NSMutableString string];
NSInteger charIndex = [reversStr length];
while (charIndex > 0) {
charIndex--;
NSRange subStrRange = NSMakeRange(charIndex, 1);
[reversedString appendString:[reversStr substringWithRange:subStrRange]];
}
NSLog(#"%#", reversedString); // outputs "SOi"
}
Hope So this is help for some one .
There is no API to do that, if that's what you are asking.
You can always iterate through the string looking for white spaces (or punctuation, it depends on your needs), identify the words and recompose your "reversed" message manually.
I have a NSMutableArray where i want to replace the sign | into a ; how can i do that?
NSMutableArray *paths = [dic valueForKey:#"PATH"];
NSLog(#"pathArr ", paths)
pathArr (
(
"29858,39812;29858,39812;29925,39804;29936,39803;29949,39802;29961,39801;30146,39782;30173,39779;30220,39774;30222,39774|30215,39775;30173,39779;30146,39782;29961,39801;29949,39802;29936,39803;29925,39804;29858,39812;29858,39812;29856,39812;29800,39819;29668,39843;29650,39847;29613,39855;29613,39855;29613,39856;29605,39857;29603,39867;29603,39867;29599,39892;29596,39909;29587,39957;29571,40018;29563,40038;29560,40043"
)
)
Update
This is where i got my path from
NSArray *BusRoute = alightDesc;
int i;
int count = [BusRoute count];
for (i = 0; i < count; i++)
{
NSLog (#"BusRoute = %#", [BusRoute objectAtIndex: i]);
NSDictionary *dic = [BusRoute objectAtIndex: i];
NSMutableArray *paths = [dic valueForKey:#"PATH"];
}
Provide that your object in the array path is string, you can do this
NSMutableArray *path2=[[NSMutableArray alloc]initWithArray:nil];
for (NSObject *obect in path) {
for (NSString *string in (NSArray*)obect) {
[path2 addObject:[string stringByReplacingOccurrencesOfString:#"|" withString:#","]];
}
}
NSLog(#"pathArr %# ", path2);
your array paths contains an another array which has string as object.
Hope this helps
//Copy the Array into a String
NSString *str = [paths componentsJoinedByString: #""];
//then replace the "|"
str = [str stringByReplacingOccurrencesOfString:#"|" withString:#";"];
i did this to replace a string in a .plist so it might work for you
array1 = [NSMutableArray arrayWithContentsOfFile:Path1];
NSString *item = [#"dfdfDF"];
[array1 replaceObjectAtIndex:1 withObject:item];
[array1 writeToFile:Path1 atomically:YES];
NSLog(#"count: %#", [array1 objectAtIndex:1]);
you may cast or convert paths to NSString and then do:
paths = (NSString *) [paths stringByReplacingOccurrencesOfString:#"|" withString:#";"];
if this does't work, create new NSString instance that containing pathArr text, invoke replaceOccurrences method and do invert conversion
NSMutableString *tempStr = [[NSMutableString alloc] init];
for (int i = 0; i < [paths count]; i++)
{
[tempStr appendString:[path objectAtIndex:i]];
}
then use this method for tempStr. And then try:
NSArray *newPaths = [tempStr componentsSeparatedByString:#";"];
may be last method not completely correct, so try experiment with it.
Uh, why don't you just go:
NSString *cleanedString = [[[dic valueForKey:#"PATH"] objectAtIndex:0] stringByReplacingOccurrencesOfString:#";" withString:#"|"];
If there are more than one nested array, you can go
for(int i = 0; i < [[dic valueForKey:#"PATH"] count]; i++)
{
NSString *cleanedString = [[[dic valueForKey:#"PATH"] objectAtIndex:i] stringByReplacingOccurrencesOfString:#";" withString:#"|"];
// do something with cleanedString
}
NSString *title = [myWebView
stringByEvaluatingJavaScriptFromString:#"document.title"];
NSMutableArray *array = [[NSMutableArray alloc] initWithCapacity:8];
int j = 0;
int i=0;
int count=0;
int len;
len = [title length];
for(i=0;i<len;i++){
NSString *c = [title substringWithRange:NSMakeRange(i, 1)];
if([c isEqualToString:#","])
{
//array[count]= [title substringWithRange:NSMakeRange(j, 2)];
NSString *xxx = [title substringWithRange:NSMakeRange(j,(i-j))];
NSLog(xxx);
//insert the string into array
[array insertObject:xxx atIndex:count];
j=i;
count = count + 1;
}
}
My app always crashes at the line
[c isEqualToString:#","]
and gives the error - Thread1 : Program received signal: "SIGBART".
I know for sure that the problem is occurring while comparing strings since the app runs if I remove that one line of code.
Can someone please help? Thanks
Consider using:
- (NSArray *)componentsSeparatedByString:(NSString *)separator
Example:
NSString *title = [myWebView stringByEvaluatingJavaScriptFromString:#"document.title"];
NSMutableArray *array = [title componentsSeparatedByString:#","];
If I ends up longer than the string, or is undefined, you've got issues. If you replace i with 1, it doesn't crash, right?
Incidentally, you could use:
unichar c = [title characterAtIndex:i];
This is the code that I would use if it was always single spaces in between words. Since I have multiple spaces in between some words how can my code be changed to remove the extra spaces when using componentsSeparatedBySring. I'm new to OBjective-C so any help would be greatly appreciated!
Here is my code:
NSString *myString = #"One Two Three Four Five";
NSArray *myArray = [myString componentsSeparatedByString: #" "];
Use NSScanner instead:
NSMutableArray *results = [NSMutableArray array];
NSScanner *scanner = [NSScanner scannerWithString:input];
NSCharacterSet *charSet = [NSCharacterSet characterSetWithCharactersInString:#" "];
while ([scanner isAtEnd] == NO)
{
NSString *string;
[scanner scanUpToCharactersFromSet:charSet intoString:&string];
[results addObject:string];
}
+ (NSArray *)componentsInString:(NSString *)string withSeparacterInString:(NSString *)separaterStr
{
if (!string || !separaterStr || [separaterStr length] < 1)
return [NSArray array];
NSMutableArray *arr = [[string componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:separaterStr]] mutableCopy];
[arr removeObject:#""]; // removes all empty components
return arr;
}
NSArray *arr = [Utils componentsInString:#"12 123 \n 14 " withSeparacterInString:#" \n"];