Replace a character in a String iPhone

Question

I want to replace a single character at a particular position in a string.

Example

String: 123-456-7890

Desired Output: 123-406-7890 (Replacing 5 at fifth position with 0)

Answer 1

https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSString_Class/

visit here and read all about string

Answer 2

Use stringByReplacingCharactersInRange:withString:, forming the NSRange variable to indicate the 5th position.

NSString *phoneNumber = @"123-456-7890";
NSString *newString = [phoneNumber stringByReplacingCharactersInRange:NSMakeRange(5, 1) withString:@"0"];
NSLog(@"%@", newString);

Output: 123-406-7890

Read all about NSString.

Answer 3

for replacing string there are lots of way:

NSString *str = [yourString stringByReplacingOccuranceOfString:@"5" withString:@"0"];

second way first get range of string like:

NSRange range = [yourSting rangeOfString:@"5"];
NSString *first = [yourString substringToIndex:range.location];
NSString *second = [yourString substringFromIndex:range.location+range.length];
NSString *yourNewStr = [NSString stringWithFormat:@"%@0%@",first,second];

Tere are lots of other using string operation but First one is best in that.

Answer 4

If you want to actually replace the 5th character rather than just any 5 you need to make a range first.

NSRange range = NSMakeRange(5, 1);
NSString *newString = [initialString stringByReplacingCharactersInRange:range withString:@"0"];

Edit: Corrected make range length

Answer 5

you can use :-

NSString *replacechar = @"0";
NSString *newString= [String stringByReplacingCharactersInRange:NSMakeRange(5,1) withString:replacechar]; 

Answer 6

Get the range (i.e. index) of first occurrence of the substring. Then replace at that range with your desired replace value.

NSString *originalString = @"123 456 789";
NSRange r = [originalString rangeOfString:@"5"];
NSString *newString = [originalString stringByReplacingCharactersInRange:r withString:@"0"];