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。
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 != ''"]];
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