// 每隔4个字符空两格 - (NSString *)formatWithTwoBlackPerfourChar:(NSString *)code { NSMutableArray *chars = [[NSMutableArray alloc] init];
for (int i = 0, j = 0 ; i < [code length]; i++, j++) { [chars addObject:[NSNumber numberWithChar:[code characterAtIndex:i]]]; NSLog(@"%@",chars); if (j == 3) { j = -1; [chars addObject:[NSNumber numberWithChar:' ']]; [chars addObject:[NSNumber numberWithChar:' ']]; } } NSLog(@"%@",chars); int length = (int)[chars count]; char str[length]; for (int i = 0; i < length; i++) { str[i] = [chars[i] charValue]; }
NSString *temp = [NSString stringWithUTF8String:str]; return temp; } |
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来自: 九辰夕 > 《UITextField输入框》