ios - 从 Objective-C 中的字符串中删除短单词和字符

Question

我有一个字符串可能是这样的:

NSString *string = @"Lorem Ipsum is simply dummy text of the printing and typesetting industry";

我希望我的结果是:

"Lorem Ipsum simply dummy printing typesetting industry"

我的第一个想法:

NSError *error = NULL;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"some regex magic" options:NSRegularExpressionCaseInsensitive error:&error];
NSString *modifiedString = [regex stringByReplacingMatchesInString:@"Lorem Ipsum is simply dummy text of the printing and typesetting industry" options:0 range:NSMakeRange(0, [firstLine length]) withTemplate:@""];
NSLog(@"%@", modifiedString);

Answer 1

嗯，我想这一定有无数种解决方案。这是其中之一:

NSString *string = @"Lorem Ipsum is simply dummy text of the printing and typesetting industry";
NSArray *words = [string componentsSeparatedByString:@" "];
NSPredicate *pred = [NSPredicate predicateWithFormat:@"length > 4"];
NSArray *largerWords = [words filteredArrayUsingPredicate:pred];
NSString *filteredString = [largerWords componentsJoinedByString:@" "];

NSLog(@"%@", filteredString);
// Outputs => Lorem Ipsum simply dummy text printing typesetting industry