两种自定义系统弹出键盘上方的view

我们在很多的应用中,都可能会遇到,在弹出的键盘上方的view,添加一些控件来作辅助功能,下面我通过2种情况来介绍:

[objc] view
plaincopy

// 屏幕的物理高度

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

// 屏幕的物理宽度

#define ScreenWidth [UIScreen mainScreen].bounds.size.width

@interface HMTMainViewController ()

@property (nonatomic, strong) UIView *testView;

@property (nonatomic, strong) UITextField *testTextField;

@property (nonatomic, strong) NSNumber *duration;

@property (nonatomic, strong) NSNumber *curve;

@end

@implementation HMTMainViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil

{

self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];

if (self) {

// Custom initialization

}

return self;

}

- (void)viewDidLoad

{

[super viewDidLoad];

// Do any additional setup after loading the view.

self.navigationItem.title = @"Demo";

[self testCustonKeyBoardView___1];

[self testCustonKeyBoardView___2];

}

// 自定义系统弹出键盘上方的view ---> 普遍情况

- (void)testCustonKeyBoardView___1

{

UITextField *testTextField = [[UITextField alloc] initWithFrame:CGRectMake(60, 200, 200, 40)];

testTextField.borderStyle = UITextBorderStyleRoundedRect;

[self.view addSubview:testTextField];

// 自定义的view

UIView *customView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 40)];

customView.backgroundColor = [UIColor redColor];

testTextField.inputAccessoryView = customView;

// 往自定义view中添加各种UI控件(以UIButton为例)

UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(270, 5, 40, 30)];

button.backgroundColor = [UIColor blackColor];

[button setTitle:@"完成" forState:UIControlStateNormal];

[button addTarget:self action:@selector(didClickButtonAction) forControlEvents:UIControlEventTouchUpInside];

[customView addSubview:button];

}

- (void)didClickButtonAction

{

NSLog(@"%s__%d__|%@",__FUNCTION__,__LINE__,@"test");

[self.view endEditing:YES];

}

// 自定义系统弹出键盘上方的view ---> 微信,QQ聊天等效果

- (void)testCustonKeyBoardView___2

{

self.testView = [[UIView alloc] initWithFrame:CGRectMake(0, ScreenHeight - 40, 320, 40)];

_testView.backgroundColor = [UIColor grayColor];

[self.view addSubview:_testView];

self.testTextField = [[UITextField alloc] initWithFrame:CGRectMake(40, 2, 200, 36)];

_testTextField.borderStyle = UITextBorderStyleRoundedRect;

[_testView addSubview:_testTextField];

UIButton *leftBtn = [UIButton buttonWithType:UIButtonTypeSystem];

leftBtn.frame = CGRectMake(242, 2, 36, 36);

[leftBtn setTitle:@"-" forState:UIControlStateNormal];

leftBtn.titleLabel.font = [UIFont systemFontOfSize: 28.0];

[_testView addSubview:leftBtn];

UIButton *rightBtn = [UIButton buttonWithType:UIButtonTypeSystem];

rightBtn.frame = CGRectMake(282, 2, 36, 36);

rightBtn.titleLabel.font = [UIFont systemFontOfSize: 28.0];

[rightBtn setTitle:@"+" forState:UIControlStateNormal];

[_testView addSubview:rightBtn];

// 通知-监听键盘弹出事件

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(changeKeyboardWillShowNotification:) name:UIKeyboardWillShowNotification object:nil];

// 通知-监听键盘回收事件

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(changeKeyboardWillHideNotification:) name:UIKeyboardWillHideNotification object:nil];

}

- (void)changeKeyboardWillShowNotification:(NSNotification *)notification

{

NSDictionary *userInfo = [notification userInfo];

// 键盘弹出后的frame的结构体对象

NSValue *valueEndFrame = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

// 得到键盘弹出后的键盘视图所在y坐标

CGFloat keyBoardEndY = valueEndFrame.CGRectValue.origin.y;

// 键盘弹出的动画时间

self.duration = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];

// 键盘弹出的动画曲线

self.curve = [userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey];

// 添加移动动画，使视图跟随键盘移动(动画时间和曲线都保持一致)

[UIView animateWithDuration:[_duration doubleValue] animations:^{

[UIView setAnimationBeginsFromCurrentState:YES];

// 不设置这个,大家可以看看有什么区别

[UIView setAnimationCurve:[_curve intValue]];

_testView.center = CGPointMake(_testView.center.x, keyBoardEndY - _testView.bounds.size.height/2.0);

}];

/**

* + (void)setAnimationCurve:(UIViewAnimationCurve)curve;

* typedef NS_ENUM(NSInteger, UIViewAnimationCurve) {

* UIViewAnimationCurveEaseInOut, // 淡入淡出，开始时慢，由慢变快，中间最快，然后变慢

* UIViewAnimationCurveEaseIn, // 淡入，开始时慢然后越来越快

* UIViewAnimationCurveEaseOut, // 淡出，开始快然后越来越慢

* UIViewAnimationCurveLinear // 线性匀速，开始和结束是一个速度

* };

*/

}

- (void)changeKeyboardWillHideNotification:(NSNotification *)notification

{

NSDictionary *userInfo = [notification userInfo];

// 键盘弹出前的frame的结构体对象

NSValue *valueStatrFrame = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

// 得到键盘弹出后的键盘视图所在y坐标

CGFloat keyBoardStatrY = valueStatrFrame.CGRectValue.origin.y;

[UIView animateWithDuration:[_duration doubleValue] animations:^{

[UIView setAnimationBeginsFromCurrentState:YES];

[UIView setAnimationCurve:[_curve intValue]];

_testView.center = CGPointMake(_testView.center.x, keyBoardStatrY - _testView.bounds.size.height/2.0);

}];

}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

[self.view endEditing:YES];

}

@示例图: