iOS实现截取字符串中汉字功能

#import "ViewController.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad];  NSArray *array = @[@"03-15_01苹果", @"412香蕉", @"#7&@15橙子"]; for (int i = 0; i < array.count; i++) {  NSString *chineseStr = [self getChineseStringWithString:array[i]];  NSLog(@"chineseStr = %@/n", chineseStr); }} - (NSString *)getChineseStringWithString:(NSString *)string{ //(unicode中文编码范围是0x4e00~0x9fa5) for (int i = 0; i < string.length; i++) {  int utfCode = 0;  void *buffer = &utfCode;  NSRange range = NSMakeRange(i, 1);    BOOL b = [string getBytes:buffer maxLength:2 usedLength:NULL encoding:NSUTF16LittleEndianStringEncoding options:NSStringEncodingConversionExternalRepresentation range:range remainingRange:NULL];    if (b && (utfCode >= 0x4e00 && utfCode <= 0x9fa5)) {   return [string substringFromIndex:i];  } } return nil;} @end