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).

来源：https://stackoverflow.com/questions/5594694/how-to-remove-particular-words-from-strings

标签

iphone

nsstring