Trying to manipulate the contents of a txtField in the textFieldDidEndEditing. What we want to do is rotate the entire contents left and then append the current character at the end.
This is to allow a user to enter a money value without a decimal point.
This is what we have so far but I'm not sure this is the best way to approach this. Nor is this code working as expected.
Any help appreciated.
//easier input for total
if (textField == txtGrandTotal)
{
//copy contents of total to string2
NSString *string1 = txtGrandTotal.text;
NSMutableString *string2;
//now string2 contains the buffer to manipulate
string2 = [NSMutableString stringWithString: string1];
//so, copy it to strMoney2
strMoney2 = string2;
int charIndex;
//for all character in strMoney2, move them rotated left to strMoney1
for (charIndex = 0; charIndex < [strMoney2 length]; charIndex++)
{
NSString *strChar = [strMoney2 substringWithRange: NSMakeRange(charIndex, 1)];
[strMoney1 insertString:strChar atIndex:charIndex+1];
}
//now append the current character to strMoney1
NSString *strCurrentChar = [string1 substringWithRange: NSMakeRange([string1 length], 1)];
[strMoney1 appendString:strCurrentChar];
//move manipulated string back to txtGrandTotal
txtGrandTotal.text = strMoney1;
}
Out of a zillion ways to approach this, this is quite short:
NSString *res = [NSString stringWithFormat:#"%#%#",
[input substringFromIndex:1],
[input substringToIndex:1]
];
or shorter:
NSString *res = [[input substringFromIndex:1]
stringByAppendingString:[input substringToIndex:1]];
Related
I want to find any word or full stop from a nsstring.
NSString *str = #"Hi, my name is Tina. I want to ask something. I am trying a lot. But I am not able. To find full stop. Position Everytime. It come in str.";
In this I want to track the position of full stop not first full stop positions every full stop position in "Str".
I know how to find words but not able to get full stop position every time it come on my str.
Here is what am I doing
NSString *str = #"Hi, my name is Tina. I want to ask something. I am trying a lot. But I am not able. To find full stop. Position Everytime. It come in str.";
NSInteger count = 0;
NSArray *arr = [str componentsSeparatedByString:#" "];
for(int i=0;i<[arr count];i++)
{
if([[arr objectAtIndex:i] isEqualToString:#"."])
count++;
}
I don't want this as it give me str character length not by word. I want to check after how many words full stop is comming.
if ([str3 rangeOfString:#"."].location == xOut) { // dont want
or
if ([str3 rangeOfString:#"."].location != NSNotFound) { // dont want
Any Idea or suggestion would be highly welcome.
NSString *str = #"Hi, my name is Tina. I want to ask something. I am trying a lot. But I am not able. To find full stop. Position Everytime. It come in str.";
[str enumerateSubstringsInRange:NSMakeRange(0, str.length) options:NSStringEnumerationBySentences usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
[substring enumerateSubstringsInRange:NSMakeRange(0, substring.length) options:NSStringEnumerationByWords | NSStringEnumerationReverse usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
NSLog(#"%#", substring); // last word
*stop = YES;
}];
}];
This will give you the last word of each sentence.
Use this code -
NSString *str = #"Hi, my name is Tina. I want to ask something. I am trying a lot. But I am not able. To find full stop. Position Everytime. It come in str.";
NSInteger count = 0;
NSArray *arr = [str componentsSeparatedByString:#"."];
for(int i = 0; i< [arr count]; i++)
{
NSString *sentence = [arr objectAtIndex:i];
sentence = [sentence stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSArray *wordArray = [sentence componentsSeparatedByString:#" "];
count = [wordArray count];
NSLog(#"No of words after full stop is comming = %i", count);
}
Try this
NSString *str = #"Hi, my name is Tina. I want to ask something. I am trying a lot. But I am not able. To find full stop. Position Everytime. It come in str.";
NSInteger count = 0;
NSArray *arr = [str componentsSeparatedByString:#" "];
for(int i=0;i<[arr count];i++)
{
NSString *arrStr=[arr objectAtIndex:i];
for(int j=0;j<arrStr.length;j++){
NSString *Schar=[arrStr substringWithRange:NSMakeRange(j, 1)];
if([Schar isEqualToString:#"."])
count++;
}
}
here,Count will show number of time . is in string.
Have a look # following links :
NSUInteger numberOfOccurrences = [[yourString componentsSeparatedByString:#"."] count] - 1;
Number of occurrences of a substring in an NSString?
Number of Occurrences of a Character in NSString
Hope this helps :)
I have an int value which I obtained from the character 爸, which is 29240. I can convert this number to hex, but I have no clue how to write the chinese character out in an NSString with only the int 29240.
Basically, what I did was:
NSString * s = #"爸";
int a = [s characterAtIndex:0];
NSLog(#"%d", a);
What it gave as output was 29240.
However, I don't know how to create an NSString that just contains 爸 from only the int 29240.
I converted 29240 into binary which gave me 7238, but I can't seem to create a method which allows me to input any integer and NSLog the corresponding character.
I can hard code it in, so that I have
char cString[] = "\u7238";
NSData *data = [NSData dataWithBytes:cString length:strlen(cString)];
NSString *string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"result string: %#", string);
But I'm not sure how to do it with any int.
Thanks to anyone who can help me!
To create a string from one (or more) Unicode characters use initWithCharacters:
unichar c = 29240;
NSString *string = [[NSString alloc] initWithCharacters:&c length:1];
NSString uses UTF-16 characters internally, so
this works for all characters in the "Basic Multilingual Plane", i.e. all characters up to U+FFFF. The following code works for arbitrary characters:
uint32_t ch = 0x1F60E;
ch = OSSwapHostToLittleInt32(ch); // To make it byte-order safe
NSString *s1 = [[NSString alloc] initWithBytes:&ch length:4 encoding:NSUTF32LittleEndianStringEncoding];
NSLog(#"%#", s1);
// Output: 😎
Try out this code snippet to get you started in the right direction:
NSString *s = #"0123456789";
for (int i = 0; i < [s length]; i++) {
NSLog(#"Value: %d", [s characterAtIndex:i]);
}
Just pass in the character as an integer:
unichar decimal = 12298;
NSString *charStr = [NSString stringWithFormat:#"%C", decimal];
my code works great until know and, if I put a double digit number into the text field (like 12) nslog returns 2 single digit numbers (like 1 and 2). Now I need to put these 2 single digit numbers into 2 strings. can somebody help me. thanks in advance.
NSString *depositOverTotalRwy = [NSString stringWithFormat:#"%#", [deposit text]];
NSArray *components = [depositOverTotalRwy
componentsSeparatedByString:#"/"];
NSString *firstThird = [components objectAtIndex:0];
for(int i = 0; i < [firstThird length]; i++)
{
char extractedChar = [firstThird characterAtIndex:i];
NSLog(#"%c", extractedChar);
}
You should be able to use -stringWithFormat:.
NSString *s = [NSString stringWithFormat:#"%c", extractedChar];
EDIT:
You can store them in an array.
NSMutableArray *digits = [NSMutableArray array];
for ( int i = 0; i < [s length]; i++ ) {
char extractedChar = [s characterAtIndex:i];
[digits addObject:[NSString stringWithFormat:#"%c", extractedChar]];
}
Try to print the value of firstThird using NSLog(), see what it exactly hold, you code seem correct,
Use characterAtIndex function for NSString to extract a character at known location
- (unichar)characterAtIndex:(NSUInteger)index
Use as below
NSString *FirstDigit = [NSString stringWithFormat:#"%c", [myString characterAtIndex:0]];
NSString *SecondDigit = [NSString stringWithFormat:#"%c", [myString characterAtIndex:1]];
when i convert my array by following method , it adds () charracter.
i want to remove the () how can i do it..
NSMutableArray *rowsToBeDeleted = [[NSMutableArray alloc] init];
NSString *postString =
[NSString stringWithFormat:#"%#",
rowsToBeDeleted];
int index = 0;
for (NSNumber *rowSelected in selectedArray)
{
if ([rowSelected boolValue])
{
profileName = [appDelegate.archivedItemsList objectAtIndex:index];
NSString *res = [NSString stringWithFormat:#"%d",profileName.userID];
[rowsToBeDeleted addObject:res];
}
index++;
}
UPDATE - 1
when i print my array it shows like this
(
70,
71,
72
)
Here's a brief example of deleting the given characters from a string.
NSString *someString = #"(whatever)";
NSCharacterSet *charSet = [NSCharacterSet characterSetWithCharactersInString:#"()"];
NSMutableString *mutableCopy = [NSMutableString stringWithString:someString];
NSRange range;
for (range = [mutableCopy rangeOfCharacterFromSet:charSet];
range.location != NSNotFound;
[mutableCopy deleteCharactersInRange:range],
range = [mutableCopy rangeOfCharacterFromSet:charSet]);
All this does is get a mutable copy of the string, set up a character set with any and all characters to be stripped from the string, and find and remove each instance of those characters from the mutable copy. This might not be the cleanest way to do it (I don't know what the cleanest is) - obviously, you have the option of doing it Ziminji's way as well. Also, I abused a for loop for the hell of it. Anyway, that deletes some characters from a string and is pretty simple.
Try using NSArray’s componentsJoinedByString method to convert your array to a string:
[rowsToBeDeleted componentsJoinedByString:#", "];
The reason you are getting the parenthesis is because you are calling the toString method on the NSArray class. Therefore, it sounds like you just want to substring the resulting string. To do this, you can use a function like the following:
+ (NSString *) extractString: (NSString *)string prefix: (NSString *)prefix suffix: (NSString *)suffix {
int strLength = [string length];
int begIndex = [prefix length];
int endIndex = strLength - (begIndex + [suffix length]);
if (endIndex > 0) {
string = [string substringWithRange: NSMakeRange(begIndex, endIndex)];
}
return string;
}
I got a headache trying to count returns (\n) in my UITextView. As you'll soon realise, I'm a bloody beginner and here is my theory of what I've come up with, but there are many gaps...
- (IBAction)countReturns:(id)sender {
int returns;
while ((textView = getchar()) != endOfString [if there is such a thing?])
{
if (textView = getchar()) == '\n') {
returns++;
}
}
NSString *newText = [[NSString alloc] initWithFormat:#"Number of returns: %d", returns];
numberReturns.text = newText;
[newText release];
}
I checked other questions on here, but people are usually (in my eyes) lost in some details which I don't understand. Any help would be very much appreciated! Thanks for your patience.
You can simply
UITextView *theview; //remove this line, and change future theview to your veiw
NSString *thestring; //for storing a string from your view
int returnint = 0;
thestring = [NSString stringWithFormat:#"%#",[theview text]];
for (int temp = 0; temp < [thestring length]; temp++){ //run through the string
if ([thestring characterAtIndex: temp] == '\n')
returnint++;
}
NSArray *newlines = [textView.text componentsSeparatedByString:#"\n"];
int returns = ([newlines count]-1)
Should work. Keep in mind this isn't such a great idea if you have a gia-normous string, but it's quick, dirty and easy to implement.
there are a lot of ways to do that. Here is one:
NSString *str = #"FooBar\n\nBaz...\n\nABC\n";
NSString *tmpStr = [str stringByReplacingOccurrencesOfString:#"\n" withString:#""];
NSInteger count = [str length] - [tmpStr length];
NSLog(#"Count: %d", count);