0.字符串拼接

NSString *str2 = @"";
    for (NSUInteger i = 0 ; i < endCount ; i++) {
        NSString *str = [NSString stringWithString:replacestr];
        str2 = [str2 stringByAppendingString:str];
    }

1.创建通知

[[NSNotificationCenter defaultCenter] postNotificationName:@"refreshzhuanzhuan" object:nil];

接收通知

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(refreshzhuanData) name:@"refreshzhuanzhuan" object:nil];

移除通知

-(void)dealloc
{
    [[NSNotificationCenter defaultCenter]removeObserver:@"通知方法名称"];
}

通知方法的实现

- (void)refreshzhuanData {
  
}

2.按钮的创建

 UIButton *paiButton = [UIButton buttonWithType:UIButtonTypeCustom];
    paiButton.frame = CGRectMake(0 ,45*SIZEH, mainScreenW, 110*SIZEH);
    // [determineButton setImage:[UIImage imageNamed:@"queding.png"] forState:UIControlStateNormal];
    paiButton.backgroundColor = [UIColor whiteColor];
    paiButton.layer.cornerRadius = 110*SIZEH/2;
    paiButton.titleLabel.font = [UIFont systemFontOfSize:14*SIZEW];
    paiButton.titleLabel.textColor = mainWhiteColor;
    [paiButton setTitle:@"下一步" forState:UIControlStateNormal];
    [paiButton addTarget:self action:@selector(paiButtonClick) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:paiButton];
点击实现方法自己写吧

3.时间戳转换成字符串,一般是数据请求来的

   CGFloat number  =[_dataSource[indexPath.row][@"insert_time"] intValue];
   NSInteger backnumber = number + 8*60*60;
   NSString *str = [NSString stringWithFormat:@"%ld",(long)backnumber];
   long long int date1 = (long long int)[str intValue];
   NSDate *date2 = [NSDate dateWithTimeIntervalSince1970:date1];
   NSString *str1 = [NSString stringWithFormat:@"%@",date2];
   NSString *str2 = [str1 substringToIndex:20];
   NSLog(@"%@",str2);
   cell.secondLabel.text = str2

4.label的创建

   _interestMoney = [[UILabel alloc] initWithFrame:CGRectMake(200 * sIZE, 13.5 * sIZE, 100 * sIZE, 20 * sIZE)];   
   _interestMoney.font = [UIFont systemFontOfSize:12 * sIZE]; 
   _interestMoney.textAlignment = NSTextAlignmentRight;  
  _interestMoney.textColor = goldTextColor;   
  [self addSubview:self.interestMoney]; 

5.UIView的创建

UIView *line1 = [[UIView alloc]initWithFrame:CGRectMake(0, 48.5*sIZE, SCREEN_Width, 0.5*sIZE)];   
line1.backgroundColor = applineColor;   
[self addSubview:line1];

6.UItextFild的创建

_userTureNameText = [[UITextField alloc]initWithFrame:CGRectMake(70*SIZEW, 5*SIZEH,  mainScreenW - 30 - 75*SIZEW, 20*SIZEH)];
    _userTureNameText.placeholder = @"拍照后请核实身份信息";
    _userTureNameText.textColor = [UIColor grayColor];
    _userTureNameText.tag = 0;
    _userTureNameText.textAlignment = NSTextAlignmentCenter;
    //_userTureNameText.delegate = self;
    _userTureNameText.keyboardType = UIKeyboardTypeDefault;//设置键盘类型
    _userTureNameText.borderStyle = UITextBorderStyleRoundedRect;//设置边框
    [View2 addSubview:_userTureNameText];

7.单击手势的点击

UITapGestureRecognizer* singleRecognizer = [[UITapGestureRecognizer alloc] init];
        [singleRecognizer addTarget:self action:@selector(cancelBtnClick)];
        //点击的次数
        singleRecognizer.numberOfTapsRequired = 1; // 单击
        //给self.view添加一个手势监测；
        [_BGView addGestureRecognizer:singleRecognizer];