how to remove particular words from strings?

问题:

I have an NSString *str, having value @"I like Programming and gaming." I have to remove "I" "like" & "and" from my string so it should look like as "Programming gaming"

How can I do this, any Idea?

回答1:

NSString *newString = @"I like Programming and gaming."; NSString *newString1 = [newString stringByReplacingOccurrencesOfString:@"I" withString:@""]; NSString *newString12 = [newString1 stringByReplacingOccurrencesOfString:@"like" withString:@""]; NSString *final = [newString12 stringByReplacingOccurrencesOfString:@"and" withString:@""]; 

Assigned to wrong string variable edited now it is fine

NSLog(@"%@",final); 

output : Programming gaming

回答2:

NSString * newString = [@"I like Programming and gaming." stringByReplacingOccurrencesOfString:@"I" withString:@""]; newString = [newString stringByReplacingOccurrencesOfString:@"like" withString:@""]; newString = [newString stringByReplacingOccurrencesOfString:@"and" withString:@""];  NSLog(@"%@", newString); 

回答3:

More efficient and maintainable than doing a bunch of stringByReplacing... calls in series:

NSSet* badWords = [NSSet setWithObjects:@"I", @"like", @"and", nil]; NSString* str = @"I like Programming and gaming."; NSString* result = nil; NSArray* parts = [str componentsSeparatedByString:@" "]; for (NSString* part in parts) {     if (! [badWords containsObject: part]) {         if (! result) {             //initialize result             result = part;         }         else {             //append to the result             result = [NSString stringWithFormat:@"%@ %@", result, part];         }     } } 

回答4:

It is an old question, but I'd like to show my solution:

NSArray* badWords = @[@"the", @"in", @"and", @"&",@"by"]; NSMutableString* mString = [NSMutableString stringWithString:str];  for (NSString* string in badWords) {      mString = [[mString stringByReplacingOccurrencesOfString:string withString:@""] mutableCopy]; }  return [NSString stringWithString:mString]; 

回答5:

Make a mutable copy of your string (or initialize it as NSMutableString) and then use replaceOccurrencesOfString:withString:options:range: to replace a given string with @"" (empty string).

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