iOS实现截取字符串中汉字功能

本文实例为大家分享了iOS截取字符串中汉字的具体代码，供大家参考，具体内容如下

写了一个简单的例子，从第一个汉字开始截取字符串。下面贴上代码：

#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

运行结果：

2016-03-22 22:10:23.639 HWEncodeTest[502:8824] chineseStr = 苹果
2016-03-22 22:10:23.639 HWEncodeTest[502:8824] chineseStr = 香蕉
2016-03-22 22:10:23.640 HWEncodeTest[502:8824] chineseStr = 橙子

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