flutter - 如何布置容器，我不知道 W&H

Question

Container怎么布局，不知道W&H

only know margin  left&right 15.0     top:20.0    bottom:30.0

Scaffold->Container->Column->**Container**

像这样:

谢谢

Answer 1

这应该做你想做的:

  body: Column(                                   
    children: [                                   
      Expanded(                                   
        child: Container(                         
          padding: EdgeInsets.only(               
            left: 15.0,                           
            right: 15.0,                          
            top: 20.0,                            
            bottom: 30.0,                         
          ),                                      
          child: Center(                          
            child: Text('child'),                 
          ),                                      
        ),                                        
      ),                                          
    ],                                            
  ),