NSString 到 NSArray

我想分割一个NSString进入一个NSArray。例如，给定：

NSString *myString=@"ABCDEF";

我想要一个NSArray like:

NSArray *myArray={A,B,C,D,E,F};

如何使用 Objective-C 和 Cocoa 做到这一点？

NSMutableArray *letterArray = [NSMutableArray array];
NSString *letters = @"ABCDEF????क्";
[letters enumerateSubstringsInRange:NSMakeRange(0, [letters length]) 
                            options:(NSStringEnumerationByComposedCharacterSequences) 
                         usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
    [letterArray addObject:substring];
}];

for (NSString *i in letterArray){
    NSLog(@"%@",i);
}

结果是

A
B
C
D
E
F
????
क्

enumerateSubstringsInRange:options:usingBlock: _{available for iOS 4+} can enumerate a string with different styles. One is called NSStringEnumerationByComposedCharacterSequences, what will enumerate letter by letter but is sensitive to surrogate pairs, base characters plus combining marks, Hangul jamo, and Indic consonant clusters, all referred as Composed Character

请注意，接受的答案 https://stackoverflow.com/a/6579795/106435“燕子”????和休息क् into क and ्.