如何使用 Objective-C 用空格分隔字符串？

Question

假设我有一个像这样的字符串：

hello world       this may     have lots   of sp:ace or little      space

我想将此字符串与此分开：

@"hello", @"world", @"this", @"may", @"have", @"lots", @"of", @"sp:ace", @"or", @"little", @"space"

谢谢。

Answer 1

NSString *aString = @"hello world       this may     have lots   of sp:ace or little      space";
NSArray *array = [aString componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
array = [array filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"SELF != ''"]];

Answer 2

我建议采用两步法：

NSArray *wordsAndEmptyStrings = [yourLongString componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
NSArray *words = [wordsAndEmptyStrings filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"length > 0"]];

Answer 3

这对我有用

NSString * str = @"Hi Hello How Are You ?";
NSArray * arr = [str componentsSeparatedByString:@" "];
NSLog(@"Array values are : %@",arr);

Answer 4

使用块来做到这一点非常容易，尝试这样的事情：

NSString* s = @"hello world       this may     have lots   of space or little      space";
NSMutableArray* ar = [NSMutableArray array];
[s enumerateSubstringsInRange:NSMakeRange(0, [s length]) options:NSStringEnumerationByWords usingBlock:^(NSString* word, NSRange wordRange, NSRange enclosingRange, BOOL* stop){
    [ar addObject:word];
}];