UIButton

1.注意UIbutton的selected的状态；

设置的这个状态，如果后面改变button的selected的Bool值，则该titleColor就会改变；

  [button setTitleColor:KWhiteColor forState:UIControlStateSelected];
      [button setTitleColor:KBlackColor forState:UIControlStateNormal];

2.自己判断的，如果当selected的bool值改变时，需要在后面添加该代码，才可以变色；因为他不会回去走该代码。

        if(sender.selected) {
            [sender setBackgroundColor:[UIColor colorWithRed:0.16 green:0.48 blue:1.00 alpha:1.00]];
            sender.layer.borderColor = KWhiteColor.CGColor;
        } else {
            [sender setBackgroundColor:KWhiteColor];
            sender.layer.borderColor = KLightTitleColor.CGColor;
        }

3.font
button.titleLabel.font

UITextFiled

1.textFiled的键盘的弹出和收回

   [textf becomeFirstResponder];
    [textf resignFirstResponder];

2.点键盘外收回键盘

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [self.view endEditing:YES];
}

3.监听键盘的弹出和收回，进而定制键盘
添加观察者

//  添加观察者，监听键盘弹出
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardDidShow:) name:UIKeyboardWillShowNotification object:nil];

    //  添加观察者，监听键盘收起
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardDidHide:) name:UIKeyboardWillHideNotification object:nil];

- (void)keyBoardDidShow:(NSNotification*)notifiction {

    //获取键盘高度
    NSValue *keyboardObject = [[notifiction userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey];
    
    NSLog(@"%@",keyboardObject);
    
    CGRect keyboardRect;
    
    [keyboardObject getValue:&keyboardRect];
    
    //得到键盘的高度
    //CGRect keyboardRect = [[notification.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey]CGRectValue];
    
    // 取得键盘的动画时间，这样可以在视图上移的时候更连贯
    double duration = [[notifiction.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
    NSLog(@"%f",duration);
    //调整放置有textView的view的位置
    
    //设置动画
    [UIView beginAnimations:nil context:nil];
    
    //定义动画时间
    [UIView setAnimationDuration:duration];
    [UIView setAnimationDelay:0];
    
    //设置view的frame，往上平移
    [(UIView *)[self.view viewWithTag:1000] setFrame:CGRectMake(0, [UIScreen mainScreen].bounds.size.height-keyboardRect.size.height-70, [UIScreen mainScreen].bounds.size.width, 70)];
    
    //提交动画
    [UIView commitAnimations];
}

- (void)keyBoardDidHide:(NSNotification*)notification {

    //定义动画
    [UIView beginAnimations:nil context:nil];
     [UIView setAnimationDuration:0.25];
    
    //设置view的frame，往下平移
    [(UIView *)[self.view viewWithTag:1000] setFrame:CGRectMake(0, [UIScreen mainScreen].bounds.size.height - 70, [UIScreen mainScreen].bounds.size.width, 70)];
     [UIView commitAnimations];
}