mmazzarolo

# 1. Make sure to globally install the npm ios-deploy module first:
npm i -g ios-deploy

# 2. Run the following command:
react-native run-ios --device

# Hint - You can also specify the device name if needed:
react-native run-ios --device "Paul's iPhone"

mmazzarolo

package com.example.matteo.firebase_recycleview;

import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.ViewGroup;

import com.firebase.client.ChildEventListener;
import com.firebase.client.DataSnapshot;
import com.firebase.client.FirebaseError;

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import android.content.Context;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.Snackbar;
import android.support.v4.view.ViewCompat;
import android.support.v4.view.ViewPropertyAnimatorListener;
import android.util.AttributeSet;
import android.view.View;

import com.github.clans.fab.FloatingActionMenu;

mmazzarolo

Async/Await, Promises, callbacks

Event driven architecture, event loop

Callback

• Come funzionano (esempio)

const fs = require('fs');

mmazzarolo

export function* signup (action) {
  const { email, password } = action
  try {
    const user = yield call(parseService.signup, email, password)
    yield put({ type: authActionTypes.SIGNUP_SUCCESS, user })
    yield call(loginSuccess, user)
  } catch (err) {
    const error = err.message || err
    yield put({ type: authActionTypes.SIGNUP_FAILURE, error })
  }

mmazzarolo

#!/bin/bash
# Starts the metro bundler and runs react-native in a single terminal (à la Expo).
# CTRL + C kills the metro bundler.
# Arguments: 
# -p Development platform [ios (default), android].
# -s Starts scrcpy too. Android only. (https://github.com/Genymobile/scrcpy)

COLOR_RED='\033[0;31m'
COLOR_CYAN='\033[0;36m'
COLOR_PURPLE='\033[0;35m'

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import * as React from "react";
import { StyleSheet, Text, View } from "react-native";

class LoginScreen extends React.Component<{}> {
  render() {
    return (
      <View style={styles.container}>
        <Text>Welcome to the login screen!</Text>
      </View>
    );

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export default class CroppedImage extends Component {
  state = {
    croppedImageSources: []
  };

  async componentDidMount() {
    const crops = 4; 
    const croppedImageHeight = imHeight / crops;
    const croppedImageSources = [];
    for (let i = 0; i <= crops; i++) {

mmazzarolo

package com.example.matteomazzarolo.imagetest;

import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

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if pgrep scrcpy; then
    osascript -e 'tell application "System Events" to tell process "scrcpy"' \
              -e 'set frontmost to true' \
              -e 'if windows is not {} then perform action "AXRaise" of item 1 of windows' \
              -e 'end tell'
else
	/usr/local/bin/scrcpy
fi