iOS6.0で発生するCFStringTransformの誤変換を回避するバッドノウハウ

ng.m

//おかしいやつ

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    [self HalfToFull];
    //以後ずっと全角になる
    [self HalfToHalf]; //半角のままであってほしい
    [self FullToHalf]; //半角になってほしい
    [self FullToFull]; //もともと全角
    
    [self HiraToKata];
    //以後ずっとカタカナになる
    [self HiraToHira]; //ひらがなのままであってほしい
    [self KataToHira]; //ひらがなになってほしい
    [self KataToKata]; //もともとカタカナ
}

-(void)FullToHalf{
    NSMutableString *fstr = [NSMutableString stringWithString:@"ａ"];
    NSLog(@"full-> %@", fstr);
    CFStringTransform((__bridge CFMutableStringRef)fstr, NULL, kCFStringTransformFullwidthHalfwidth, false);
    NSLog(@"half   %@", fstr);
}

-(void) FullToFull{
    NSMutableString *fstr = [NSMutableString stringWithString:@"ａ"];
    NSLog(@"full-> %@", fstr);
    CFStringTransform((__bridge CFMutableStringRef)fstr, NULL, kCFStringTransformFullwidthHalfwidth, true);
    NSLog(@"full   %@", fstr);
}

-(void) HalfToFull{
    NSMutableString *hstr = [NSMutableString stringWithString:@"a"];
    NSLog(@"half-> %@", hstr);
    CFStringTransform((__bridge CFMutableStringRef)hstr, NULL, kCFStringTransformFullwidthHalfwidth, true);
    NSLog(@"full   %@", hstr);
}

-(void) HalfToHalf{
    NSMutableString *hstr = [NSMutableString stringWithString:@"a"];
    NSLog(@"half-> %@", hstr);
    CFStringTransform((__bridge CFMutableStringRef)hstr, NULL, kCFStringTransformFullwidthHalfwidth, false);
    NSLog(@"half   %@", hstr);
}

-(void) HiraToKata{
    NSMutableString *hstr = [NSMutableString stringWithString:@"あ"];
    NSLog(@"Hira-> %@", hstr);
    CFStringTransform((__bridge CFMutableStringRef)hstr, NULL, kCFStringTransformHiraganaKatakana, false);
    NSLog(@"Kata   %@", hstr);
}

-(void) HiraToHira{
    NSMutableString *hstr = [NSMutableString stringWithString:@"あ"];
    NSLog(@"Hira-> %@", hstr);
    CFStringTransform((__bridge CFMutableStringRef)hstr, NULL, kCFStringTransformHiraganaKatakana, true);
    NSLog(@"Hira   %@", hstr);
}

-(void) KataToHira{
    NSMutableString *hstr = [NSMutableString stringWithString:@"ア"];
    NSLog(@"Kata-> %@", hstr);
    CFStringTransform((__bridge CFMutableStringRef)hstr, NULL, kCFStringTransformHiraganaKatakana, true);
    NSLog(@"Hira   %@", hstr);
}

-(void) KataToKata{
    NSMutableString *hstr = [NSMutableString stringWithString:@"ア"];
    NSLog(@"Kata-> %@", hstr);
    CFStringTransform((__bridge CFMutableStringRef)hstr, NULL, kCFStringTransformHiraganaKatakana, false);
    NSLog(@"Kata   %@", hstr);
}

ok.m

//だいじょうぶなやつ

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    [self HalfToFull];
    //なぜかひらがな・カタカナ変換すると・・・
    [self HiraToKata];
    //ちゃんと半角になる
    [self FullToHalf];
    
    [self HiraToKata];
    //なぜか半角・全角変換すると・・・
    [self HalfToFull];
    //ちゃんとひらがなになる
    [self KataToHira];
}

-(void)FullToHalf{
    NSMutableString *fstr = [NSMutableString stringWithString:@"ａ"];
    NSLog(@"full-> %@", fstr);
    CFStringTransform((__bridge CFMutableStringRef)fstr, NULL, kCFStringTransformFullwidthHalfwidth, false);
    NSLog(@"half   %@", fstr);
}

-(void) FullToFull{
    NSMutableString *fstr = [NSMutableString stringWithString:@"ａ"];
    NSLog(@"full-> %@", fstr);
    CFStringTransform((__bridge CFMutableStringRef)fstr, NULL, kCFStringTransformFullwidthHalfwidth, true);
    NSLog(@"full   %@", fstr);
}

-(void) HalfToFull{
    NSMutableString *hstr = [NSMutableString stringWithString:@"a"];
    NSLog(@"half-> %@", hstr);
    CFStringTransform((__bridge CFMutableStringRef)hstr, NULL, kCFStringTransformFullwidthHalfwidth, true);
    NSLog(@"full   %@", hstr);
}

-(void) HalfToHalf{
    NSMutableString *hstr = [NSMutableString stringWithString:@"a"];
    NSLog(@"half-> %@", hstr);
    CFStringTransform((__bridge CFMutableStringRef)hstr, NULL, kCFStringTransformFullwidthHalfwidth, false);
    NSLog(@"half   %@", hstr);
}

-(void) HiraToKata{
    NSMutableString *hstr = [NSMutableString stringWithString:@"あ"];
    NSLog(@"Hira-> %@", hstr);
    CFStringTransform((__bridge CFMutableStringRef)hstr, NULL, kCFStringTransformHiraganaKatakana, false);
    NSLog(@"Kata   %@", hstr);
}

-(void) HiraToHira{
    NSMutableString *hstr = [NSMutableString stringWithString:@"あ"];
    NSLog(@"Hira-> %@", hstr);
    CFStringTransform((__bridge CFMutableStringRef)hstr, NULL, kCFStringTransformHiraganaKatakana, true);
    NSLog(@"Hira   %@", hstr);
}

-(void) KataToHira{
    NSMutableString *hstr = [NSMutableString stringWithString:@"ア"];
    NSLog(@"Kata-> %@", hstr);
    CFStringTransform((__bridge CFMutableStringRef)hstr, NULL, kCFStringTransformHiraganaKatakana, true);
    NSLog(@"Hira   %@", hstr);
}

-(void) KataToKata{
    NSMutableString *hstr = [NSMutableString stringWithString:@"ア"];
    NSLog(@"Kata-> %@", hstr);
    CFStringTransform((__bridge CFMutableStringRef)hstr, NULL, kCFStringTransformHiraganaKatakana, false);
    NSLog(@"Kata   %@", hstr);
}