save

问题 I am using storyboards and a dynamic UITableView adding my cells like below. I need to know how I can save this text in the UITextField in each cell as well as UISwitch state etc so when I scroll up and down, the data is not lost. Also when the app closes, I need it to show the data entered when reopening. I am pretty new to programming, and this is my first UItableView project. Coding examples would be great, please give as much detail as possible! thank you in advance! - (UITableViewCell *

问题 I've been searching around a lot and couldn't accomplish this. I have created a class 'VectorEx', extending 'Vector', to store two methods, one for saving the vector and one for loading it. I know i have to use FileOutputStream and openFileInput() but I'm unable to create the file. I'm still pretty new to android programming, so a simple explanation is appreciated. public class VectorEx extends Vector<Subject> { public void save(String name, Context ctx) { try { File file = new File(name); if

问题 in my db i have 20+ columns. i added 19 columns throught input form and stored in db succesfully. i fetch few rows from db in my main page. in my main page 1 more column is there. that is status column, it is a combo box type. if i click status column it should show 4 values. i want to select one of the values and then when i click save button it must go to stored in db with that same ID. how to do that? i tried but its not updated in mysql db... mainpage combo box coding: echo "\t<td><form

问题 Saving Excel file that contains (even an empty) pivot table results in "Null Reference Exception" without any helpful message. The image that shows the exception message is here below. 回答1: If you create pivot tables with EPPlus, make sure all your columns have headers (naming of the column as first row ). Missing headers result in "null reference exception" when trying to save the file, even though all the rest of the application is perfectly functioning. What a devil. 来源： https:/

问题 Referring to the answer to this question, I tried to save my own JPG image files, after some basic image processing. I've only applied a rotation and a shear. This is my code: import numpy as np import sys from skimage import data, io, filter, color, exposure import skimage.transform as tf from skimage.transform import rotate, setup, AffineTransform from PIL import Image mypath = PATH_TO_FILENAME readfile = FILENAME img = color.rgb2gray(io.imread(mypath + readfile)) myimg = rotate(img, angle

问题 In my project, I have an Organization model and an Address model. Here is the association beetween the models: class Organization < ApplicationRecord has_one :address accepts_nested_attributes_for :address end class Address < ApplicationRecord belongs_to :organization end I added address attributes in my new organization form like this (form_with for Organization attributes and fields_for for Address attributes): <%= form_with(model: organization, local: true) do |form| %> <div class="field">

问题 Hi every body i am stuck with a problem that how to save images in our SQLite database . Image reside at particular url e.g.- http://images.201bestbuy.com/images/small_137385013870957.jpg Now i want to save image in my sqlit database from this url without user interaction. To solve this issue i used public class ImageLoader { MemoryCache memoryCache = new MemoryCache(); FileCache fileCache; private Map<ImageView, String> imageViews = Collections .synchronizedMap(new WeakHashMap<ImageView,

问题 I have an iOS app using a tabBarController. Each tabs root view is a navigation controller. In one of the tabs I use a button on the navigation bar to push me to UIViewController that contains a UITextView. The problem I am struggling with is that any content added to the UITextView is lost when back button on the navigation bar is pushed. I have found a few similar questions all with drastically different solutions. I am not sure how to proceed from here. To be clear on what I would like to

问题 I use the cron library in NPM. I want to make events for users, that create jobs that are expected to be executed in a month after the event. Let's say that this is my code: function userSignedUpEvent(user) { var today = new Date(); today.setDate(today.getDate() + 30); let cronSignature = `${today.getMinutes()} ${today.getHours()} ${today.getDate()} ${today.getMonth()} *` let reminderJob = new CronJob(cronSignature, () => { user.sendEmail("It has been a month since you joined us!"); }, null,

问题 I'm having a problem : i can' find a way to save properly my UITextView in a NSString. I have created 4 UITextViews and i want them to be saved in the same file. Heres the code : -(void)destinataireTextView { self.destiView = [[[UITextView alloc] initWithFrame:CGRectMake(200, 160, 150, 120)] autorelease]; [self.view addSubview: self.destiView]; } -(void)expediteurTextView { self.expediView = [[[UITextView alloc] initWithFrame:CGRectMake(430, 200, 150, 120)] autorelease]; [self.view addSubview