如何将字符串@"Hello"
拆分为:
'H'
,'e'
,'l'
,'l'
,'o'
或:
@[@"H", @"e", @"l", @"l", @"o"]
答案 0 :(得分:33)
如果您对char
的C数组感到满意,请尝试:
const char *array = [@"Hello" UTF8String];
如果您需要NSArray,请尝试:
NSMutableArray *array = [NSMutableArray array];
NSString *str = @"Hello";
for (int i = 0; i < [str length]; i++) {
NSString *ch = [str substringWithRange:NSMakeRange(i, 1)];
[array addObject:ch];
}
array
将每个字符都包含在其中。
答案 1 :(得分:7)
试试这个:
- (void) testCode
{
NSString *tempDigit = @"12345abcd" ;
NSMutableArray *tempArray = [NSMutableArray array];
[tempDigit enumerateSubstringsInRange:[tempDigit rangeOfString:tempDigit]
options:NSStringEnumerationByComposedCharacterSequences
usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
[tempArray addObject:substring] ;
}] ;
NSLog(@"tempArray = %@" , tempArray);
}
答案 2 :(得分:4)
您可以使用- (unichar)characterAtIndex:(NSUInteger)index
访问每个索引处的字符串字符。
所以,
NSString* stringie = @"astring";
NSUInteger length = [stringie length];
unichar stringieChars[length];
for( unsigned int pos = 0 ; pos < length ; ++pos )
{
stringieChars[pos] = [stringie characterAtIndex:pos];
}
// replace the 4th element of stringieChars with an 'a' character
stringieChars[3] = 'a';
// print the modified array you produced from the NSString*
NSLog(@"%@",[NSString stringWithCharacters:stringieChars length:length]);
答案 3 :(得分:0)
用户529758提到,拆分你的字符串 - C方式 - 如:
const char *array = [@"Hello" UTF8String];
但是然后使用:
循环它for (int i = 0; i < sizeof(array); i++) {
doSomethingWithCharacter(array[i]);
}