iOS 开启个人热点后屏幕的适配问题

//iOS 在开启个人热点后会调用此方法
- (void)viewWillLayoutSubviews
//
//  ViewController.m
//  test_Person_Hotspot_01
//
//  Created by admin on 1/28/16.
//  Copyright © 2016 jeffasd. All rights reserved.
//

#import "ViewController.h"

#define SCREEN_WIDTH  [[UIScreen mainScreen] bounds].size.width/2

#define SCREEN_HEIGHT  [[UIScreen mainScreen] bounds].size.height

@interface ViewController ()
{
    UIButton *button;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    
    button = [UIButton buttonWithType:UIButtonTypeCustom];
    
//    [[UIScreen mainScreen] bounds].size.width/2;
    
//    button.frame = CGRectMake(SCREEN_WIDTH, SCREEN_HEIGHT - 20 -50, 50, 50);
    
    button.frame = CGRectMake(SCREEN_WIDTH, self.view.frame.size.height - 20 -50, 50, 50);
    
//    button.bounds = CGRectMake(SCREEN_WIDTH, SCREEN_HEIGHT - 20 -50, 50, 50);
    
//    button.bounds = CGRectMake(50, 50, 50, 42);
    
    button.backgroundColor = [UIColor cyanColor];
    
    [self.view addSubview:button];
    
    self.tabBar.frame = CGRectMake(0, self.view.frame.size.height-40, 320, 40);
    
    
}

- (void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    
    self.view.backgroundColor = [UIColor whiteColor];
}

- (void)viewDidAppear:(BOOL)animated{
    [super viewDidAppear:animated];
    
    self.view.backgroundColor = [UIColor whiteColor];
}

- (void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    
    self.view.backgroundColor = [UIColor whiteColor];
}

//iOS 在开启个人热点后会调用此方法
- (void)viewWillLayoutSubviews{
    
    button.frame = CGRectMake(SCREEN_WIDTH, self.view.frame.size.height - 20 -50, 50, 50);
    
    [super viewWillLayoutSubviews];
    
    self.view.backgroundColor = [UIColor redColor];
    
    [self.view layoutSubviews];
    
    NSLog(@"the Screen is %@", NSStringFromCGRect([[UIScreen mainScreen] bounds]));
    
    NSLog(@"the VC view frame is %@", NSStringFromCGRect(self.view.frame));
    
//    button.frame = CGRectMake(SCREEN_WIDTH, SCREEN_HEIGHT - 20 -50, 50, 50);
    
//    button.frame = CGRectMake(SCREEN_WIDTH, self.view.frame.size.height - 20 -50, 50, 50);
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end