This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
how to get substring of nsstring?
how do I get a substring in iOS?
I am new to iphone.In my project i have a string such as chapter1 but actually i want the substring 1 only how it is possible.if any body know this please help me
Check out the substringFromIndex: or substringToIndex: methods of NSString. You can find the documentation for NSString here.
Ex:
NSString *string = #"Chapter1";
NSString *newString = [string subStringFromIndex: ([string length] - 1)]; // => "1"
Related
This question already has answers here:
Append string with variable
(4 answers)
Shortcuts in Objective-C to concatenate NSStrings
(30 answers)
Closed 5 years ago.
I'm new to Objective-C and I couldn't find a direct solution for my problem where it is explained how to add string behind or in front of an array value .
I try to get some text from an array and add some other string behind or infront of it (will be used in tableviewcell). In Android it's working just with + signs, that's why I couldn't handle it here.
I try to do something like below:
"some text" +[arrayName objectAtIndex:indexPath.row] + "some text"
You need to use stringWithFormat to concatenate those values, or you can use NSMutableString as well
Use this
NSString* finalText = [NSString stringWithFormat:#"some text %# some text",[arrayName objectAtIndex:indexPath.row]];
Another way
NSMutableString* finalString = [NSMutableString stringWithString:#"test Text"];
[finalString appendString:[arrayName objectAtIndex:indexPath.row]];
[finalString appendString:#"test Text 2"];
Short:
[NSString stringWithFormat:#"%#/%#/%#", "some text", [arrayName objectAtIndex:indexPath.row], "some text"];
For further answers see: https://stackoverflow.com/a/510444/9310455
This question already has answers here:
Remove Characters and Everything After from String
(2 answers)
Closed 8 years ago.
I can't seem to find the answer to this anywhere. I can do it in c but objective c is difficult.
I want to cut the end of a string after a certain character
so user#example.com will become user (cut at '#')
How do I do this?
This will give you the first chunk of text that comes before your special character.
NSString *separatorString = #"#";
NSString *myString = #"user#example.com";
NSString *myNewString = [myString componentsSeparatedByString:separatorString].firstObject;
https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSString_Class/Reference/NSString.html#//apple_ref/occ/instm/NSString/componentsSeparatedByString:
You can use a combination of substringToIndex: and rangeOfString: methods, like this:
NSString *str = #"user#example.com";
NSRange pos = [str rangeOfString:#"#"];
if (pos.location != NSNotFound) {
NSString *prefix = [str substringToIndex:pos.location];
}
Notes:
You need to check the location against NSNotFound to ensure that the position is valid.
substringToIndex: excludes the index itself, so the # character would not be included.
This question already has answers here:
NSUInteger should not be used in format strings?
(4 answers)
Closed 8 years ago.
I'm trying to cast a NSUInteger to a string so I can print a message. From searching, it seems like I need to use stringWithFormat, but I am getting an error that an implicit cast not allowed with ARC.
Here's the line in question:
NSString *text = [[NSString stringWithFormat: (#"%li", NSUInteger)];
I've tried changing the format specifier to %lu with no help.
Thanks.
You probably have a variable of type NSUInteger, something like
NSUInteger myNumber;
Then you can convert it to a string like this:
NSString *text = [NSString stringWithFormat:#"%li", myNumber];
A solution that I prefer now is this:
NSString *text = [NSString stringWithFormat:#"%#", #(myNumber)];
This helps avoid compile warnings about incorrect number formatting codes (after a long time I still get confused in them).
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This question does not appear to be about programming within the scope defined in the help center.
Closed 9 years ago.
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I've looked at several posts to answer my question but i keep getting errors.
I basically have an NSString that holds 2 characters...
myString = #"ABC";
All I want to do is assign the first character in myString to another NSString variable...
NSString *firstChar;
firstChar = [myString characterAtIndex:0];
I get this error when i do this:
Incompatible integer to pointer conversion assigning to 'unichar *' (aka 'unsigned short *') from 'unichar' (aka 'unsigned short')
What am I doing wrong?
NSString's characterAtIndex: returns a unichar, not a string, so you can't just assign it to another string. You need to create a string from it first:
NSString *myString = #"ABC";
unichar firstChar = [myString characterAtIndex:0];
NSString *string = [NSString stringWithCharacters:&firstChar length:1];
Of course, as DarkDust says, you can also use substringWithRange: to get a string from a subrange of a string:
[myString subStringWithRange:NSMakeRange(0, 1)]; // to get the first character
[myString subStringWithRange:NSMakeRange(1, 2)]; // to get the second and third characters
The characterAtIndex: method returns a unichar (an integer representation of the character). What you want is -[NSString substringWithRange:], like [myString substringWithRange:NSMakeRange(0, 1)];
This question already has answers here:
Get the extension of a file contained in an NSString
(6 answers)
Closed 9 years ago.
I want get extension (format file from NSString) but I dont know about it please tell me syntax for getting format file from NSString.
NSString *name = #"Xcode-tutorial.pdf"
I want get .pdf format and store in one variable
Use NSStrings pathExtension method:
NSString *fileExtension = [name pathExtension];
Did you look in the documentation? There is a method that does just that:
NSString *ext = [name pathExtension];
NSLog(#"%#", ext);
use this my dear:
NSString *a = [name pathExtension];