【代碼筆記】iOS-產生隨機字串，筆記ios-字串

【代碼筆記】iOS-產生隨機字串，筆記ios-字串

一，代碼：

- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.        NSLog(@"---產生隨機字串---%@",[self generateTradeNO]);    }//產生隨機字串- (NSString *)generateTradeNO{    static int kNumber = 15;        NSString *sourceStr = @"0123456789ABCDEFGHIJKLMNOPQRST";    NSMutableString *resultStr = [[NSMutableString alloc] init];    srand(time(0));    for (int i = 0; i < kNumber; i++)    {        unsigned index = rand() % [sourceStr length];        NSString *oneStr = [sourceStr substringWithRange:NSMakeRange(index, 1)];        [resultStr appendString:oneStr];    }    return resultStr;}

 

二，輸出：

2015-10-23 10:04:22.908 產生隨機字串[974:46634] ---產生隨機字串---DQA5AGLNIBD52KQ