ios 如何判断字符串含有中文字符？

NSString *text = @"i'm a 苹果。...";
int length = [text length];

for (int i=0; i<length; ++i)
{
NSRange range = NSMakeRange(i, 1);
NSString *subString = [text substringWithRange:range];
const char *cString = [subString UTF8String];
if (strlen(cString) == 3)
{
NSLog(@"汉字:%s", cString);
}
} 

NSString *str = @"i'm a 苹果。...";

for(int i=0; i< [str length];i++){

int a = [str characterAtIndex:i];

if( a > 0x4e00 && a < 0x9fff)

NSLog(@"汉字");

}

NSString *str = @"i'm a 苹果。...";

for(int i=0; i< [str length];i++){

int a = [str characterAtIndex:i];

if( a > 0x4e00 && a < 0x9fff)

NSLog(@"汉字");

}

 

NSString *str = @"i'm a 苹果。...";

for(int i=0; i< [str length];i++){

int a = [str characterAtIndex:i];

if( a > 0x4e00 && a < 0x9fff)

NSLog(@"汉字");

}