oc中文转字符串

<pre name="code" class="objc">#import "ViewController.h"@interface ViewController ()<UIAlertViewDelegate>@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];        CFMutableStringRef string = CFStringCreateMutableCopy(NULL, 0, CFSTR("你好啊"));    CFStringTransform(string, NULL, kCFStringTransformToLatin, false);    CFStringTransform(string, NULL, kCFStringTransformStripCombiningMarks, false);    NSLog(@"%@",string);    CFRelease(string);}@end