//

//  ViewController.m

//  CX TextFiled伴随键盘移动的实现

//

//  Created by ma c on 16/3/31.

//  Copyright © 2016年 xubaoaichiyu. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()

@property (weak, nonatomic) IBOutlet NSLayoutConstraint *bottomSpace;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    //简历通知

    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardWillChangeFrameNotification:) name:UIKeyboardWillChangeFrameNotification object:nil];

}

-(void)keyboardWillChangeFrameNotification:(NSNotification *)note{

    //获取键盘的饿frame

    CGRect frmae = [note.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];

    //让TextFiled的底部约束间距为屏幕高度减去键盘顶部的y值即可

    //注意 这里不要使其等于键盘的高度，因为高度时死的，会导致键盘下去后，TextField并未下去的结果。

    self.bottomSpace.constant = [UIScreen mainScreen].bounds.size.height - frmae.origin.y;

    //获取键盘的动画时间，使TextField与键盘的形态一致

    CGFloat interval = [note.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];

    //设置Text的动画

    [UIView animateWithDuration:interval animations:^{

        //注意这里不是改变值，之前已经改变值了，

        //在这里需要做的事强制布局

        [self.view layoutIfNeeded];

    }];

}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

    [self.view endEditing:YES];

}

@end