NSArray *values = @[@"1", @"2", @"3", nil];
NSString *bankName =values[0][0];
NSString *salePointName =values[0][1];
NSString *accountName =values[0][2];

// 判斷text是否為空
static BOOL isEmpty(id thing) {
return thing == nil
|| [thing isKindOfClass:[NSNull class]]
|| ([thing respondsToSelector:@selector(length)]
&& [(NSData *)thing length] == 0)
|| ([thing respondsToSelector:@selector(count)]
&& [(NSArray *)thing count] == 0);
}

1. 判斷狀態(tài)
   NSString *alert = nil;
   if (isEmpty(bankName)) {
   alert = @"信息不能為空";
   }else if (isEmpty(salePointName)) {
   alert = @"信息不能為空";
   }else if (isEmpty(accountName)) {
   alert = @"不能為空";
   }else {

   }

2. 顯示狀態(tài)
   if (isEmpty(alert)) {
   // 顯示提示
   [self showOnlyTextDialog:alert];
   }else{

   }