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

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。