Common Settings Return Button in iOS

// Add a return button 
-(void)backBtn{
  UIButton *backBtn=[[UIButton alloc]initWithFrame:CGRectMake(0, 10, 60, 20)];
  [backBtn setTitle:@" Return " forState:UIControlStateNormal];
  backBtn.titleLabel.font=[UIFont systemFontOfSize:12];
  backBtn.imageEdgeInsets=UIEdgeInsetsMake(2,2,2,2);
  [backBtn setImage:[UIImage imageNamed:@"fanhui"] forState:UIControlStateNormal];
  [backBtn addTarget:self action:@selector(backto) forControlEvents:UIControlEventTouchDown];
  UIBarButtonItem *leftBtn=[[UIBarButtonItem alloc]initWithCustomView:backBtn];
  UIBarButtonItem *flexBtn=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
  flexBtn.width=-10;// Positive numbers move to the left and negative numbers move to the right 
  self.navigationItem.leftBarButtonItems=@[flexBtn,leftBtn];
}
// Return button 
-(void)backto{
  [self dismissViewControllerAnimated:YES completion:^{
  }];
}