How to replace a character is a string in Objective-C?
This question is related to
ios
objective-c
iphone
nsstring
You could use the method
- (NSString *)stringByReplacingOccurrencesOfString:(NSString *)target
withString:(NSString *)replacement
...to get a new string with a substring replaced (See NSString documentation for others)
Example use
NSString *str = @"This is a string";
str = [str stringByReplacingOccurrencesOfString:@"string"
withString:@"duck"];
If you want multiple string replacement:
NSString *s = @"foo/bar:baz.foo";
NSCharacterSet *doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"/:."];
s = [[s componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @""];
NSLog(@"%@", s); // => foobarbazfoo
NSString objects are immutable (they can't be changed), but there is a mutable subclass, NSMutableString, that gives you several methods for replacing characters within a string. It's probably your best bet.
The problem exists in old versions on the iOS. in the latest, the right-to-left works well. What I did, is as follows:
first I check the iOS version:
if (![self compareCurVersionTo:4 minor:3 point:0])
Than:
// set RTL on the start on each line (except the first)
myUITextView.text = [myUITextView.text stringByReplacingOccurrencesOfString:@"\n"
withString:@"\u202B\n"];
NSString *stringreplace=[yourString stringByReplacingOccurrencesOfString:@"search" withString:@"new_string"];
It also posible string replacement with stringByReplacingCharactersInRange:withString:
for (int i = 0; i < card.length - 4; i++) {
if (![[card substringWithRange:NSMakeRange(i, 1)] isEqual:@" "]) {
NSRange range = NSMakeRange(i, 1);
card = [card stringByReplacingCharactersInRange:range withString:@"*"];
}
} //out: **** **** **** 1234
Source: Stackoverflow.com