Iphone – UIImageView resize

You can try it this way:

NSString *bundle = [[NSBundle mainBundle] bundlePath];
NSString *webPath = [bundle stringByAppendingPathComponent:{htmlFilename}]
UIWebView* browser = [[UIWebView alloc] initWithFrame:
                              CGRectMake(0, 0, 200, 300)];
[browser loadRequest:[NSURLRequest requestWithURL:
                              [NSURL fileURLWithPath:webPath]]];
[self addSubview:browser];

You'll also want to set delegates on the browser so you get informed when the contents have finished loading.

According config/database.php and .env file that You show us everything is ok.

SQLSTATE[3D000]: Invalid catalog name: 1046 No database selected

this means that database is not selected,
seems like have problem with existence of database, or DB_NAME does not get in config database param.

There is some steps You've to check:

1) Check Your config/database.php file contents to have such content:

<?php

return [

    'fetch' => PDO::FETCH_CLASS,

    'default' => 'mysql',

    'connections' => [

        'mysql' => [
            'driver' => 'mysql', 
            'host' => env('DB_HOST'),         
            'database' => env('DB_DATABASE'), 
            'username' => env('DB_USERNAME'), 
            'password' => env('DB_PASSWORD'), 
            'charset' => 'utf8', 
            'collation' => 'utf8_unicode_ci', 
            'prefix' => '', 
            'strict' => false
        ],

        'mysql2' => [
            'driver' => 'mysql', 
            'host' => env('DB_HOST_ACADEMY'), 
            'database' => env('DB_DATABASE_ACADEMY'), 
            'username' => env('DB_USERNAME_ACADEMY'), 
            'password' => env('DB_PASSWORD_ACADEMY'), 
            'charset' => 'utf8', 
            'collation' => 'utf8_unicode_ci', 
            'prefix' => '', 
            'strict' => false
        ],

        'mysql3' => [
            'driver' => 'mysql', 
            'host' => env('DB_HOST_ACADEMY'), 
            'database' => env('DB_DATABASE_ACADEMY_DATE'), 
            'username' => env('DB_USERNAME_ACADEMY'), 
            'password' => env('DB_PASSWORD_ACADEMY'), 
            'charset' => 'utf8', 
            'collation' => 'utf8_unicode_ci', 
            'prefix' => '', 
            'strict' => false
        ]
    ],

    'migrations' => 'migrations',

    'redis' => [
        'cluster' => false,
        'default' => [
            'host' => '127.0.0.1', 
            'port' => 6379, 
            'database' => 0
        ]
    ]
];

2) Check Your .env file exist in Your app root and it's not .env.example

3) Check .env file to have this line, if Yes so delete and copy-paste it from here (maybe spelling issue):

DB_DATABASE=gestion-inscriptions-v2

p.s. because of in Your question files are correct need more debug info, screenshot and etc. to see that problem is not with .env or file system (maybe .env file cannot be read).