@interface FACommentKeyBoard()<UITextViewDelegate>
//动画时间
@property (nonatomic, assign) CGFloat animationDuration;
//键盘的偏移量
@property (nonatomic, assign) CGFloat offsetMarginY;
//设置最大行数
@property(nonatomic,assign)int maxLine;
//上下间距
@property(nonatomic,assign)CGFloat topOrBottomEdge;
//键盘的Y值
@property(nonatomic,assign)CGFloat keyboardY;
@end
@implementation FACommentKeyBoard
-(instancetype)initWithFrame:(CGRect)frame{
self = [super initWithFrame:frame];
if (self) {
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChangeFrame:) name:UIKeyboardWillChangeFrameNotification object:nil];
self.maxLine = 3;
self.topOrBottomEdge = 16;
}
return self;
}
-(instancetype)initCommentKeyBoard{
self = [super init];
if (self) {
self.frame = [UIScreen mainScreen].bounds;
self.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.1];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(dismissCommentKeyBoard)];
[self addGestureRecognizer:tap];
[self addSubview:self.toolBar];
[self.toolBar addSubview:self.textView];
[self.toolBar addSubview:self.sendBtn];
}
return self;
}
-(UIView *)toolBar{
if (!_toolBar) {
_toolBar = [[UIView alloc]init];
_toolBar.backgroundColor = [UIColor colorWithHexString:@"#f5f5f5"];
_toolBar.frame = CGRectMake(0, SCREEN_HEIGHT, SCREEN_WIDTH, 66);
[self addSubview:_toolBar];
}
return _toolBar;
}
-(UITextView *)textView{
if (!_textView) {
_textView = [[UITextView alloc]init];
_textView.frame = CGRectMake(16, 16, SCREEN_WIDTH-32-64, 34);
_textView.delegate = self;
_textView.contentInset = UIEdgeInsetsMake(0, 15, 0, 15);
_textView.text = @"差点就类似的的暗示大";
_textView.layer.borderWidth = 0.5;
_textView.layer.cornerRadius = 20;
_textView.layer.borderColor = [UIColor colorWithHexString:@"#E5E5E5"].CGColor;
_textView.textColor = [UIColor colorWithHexString:@"#000000"];
if (@available(iOS 11.0, *)) {
_textView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
}
_textView.font = [UIFont systemFontOfSize:15.0];
}
return _textView;
}
-(UIButton *)sendBtn{
if (!_sendBtn) {
_sendBtn = [UIButton buttonWithType:UIButtonTypeCustom];
_sendBtn.frame = CGRectMake(CGRectGetMaxX(self.textView.frame)+20.f, 36-8, 40, 16);
_sendBtn.contentHorizontalAlignment = 0;
[_sendBtn setTitle:@"发送" forState:UIControlStateNormal];
[_sendBtn setTitleColor:[UIColor colorWithHexString:@"#999999"] forState:UIControlStateNormal];
_sendBtn.titleLabel.font = [UIFont systemFontOfSize:16.0];
}
return _sendBtn;
}
#pragma mark--显示键盘
-(void)showCommentKeyBoard{
UIWindow *rootWindow = [UIApplication sharedApplication].keyWindow;
[rootWindow addSubview:self];
[UIView animateWithDuration:0.2 animations:^{
self.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.7];
}];
}
#pragma mark--键盘消失
- (void)dismissCommentKeyBoard
{
self.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.2];
[UIView animateWithDuration:0.2
delay:0.0
options:UIViewAnimationOptionCurveEaseInOut
animations:^{
}
completion:^(BOOL finished){
[self.toolBar removeFromSuperview];
[self removeFromSuperview];
}];
}
#pragma mark--监听键盘相应
- (void)keyboardWillChangeFrame:(NSNotification *)notification
{
CGRect keyboardFrame = [notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
CGFloat keyboardHeight = keyboardFrame.size.height;
CGFloat keyboardAnimaitonDuration = [notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] floatValue];
self.animationDuration = keyboardAnimaitonDuration;
NSInteger option = [notification.userInfo[UIKeyboardAnimationCurveUserInfoKey] integerValue];
self.keyboardY = keyboardFrame.origin.y;
//判断键盘是否出现
BOOL isKeyBoardHidden = SCREEN_HEIGHT == keyboardFrame.origin.y;
self.offsetMarginY = isKeyBoardHidden ? SCREEN_HEIGHT - self.toolBar.height :SCREEN_HEIGHT - self.toolBar.height - keyboardHeight;
//修改工具条的尺寸
[UIView animateKeyframesWithDuration:self.animationDuration delay:0 options:option animations:^{
self.toolBar.frame = CGRectMake(0, self.offsetMarginY, SCREEN_WIDTH, 72);
} completion:nil];
}
#pragma mark--监听输入框发生的改变
-(void)textViewDidChange:(UITextView *)textView{
//行间距
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineSpacing = 3;// 字体的行间距
NSDictionary *attributes = @{NSFontAttributeName:[UIFont systemFontOfSize:15],NSParagraphStyleAttributeName:paragraphStyle};
textView.attributedText = [[NSAttributedString alloc] initWithString:textView.text attributes:attributes];
//计算高度
CGFloat contentSizeH = self.textView.contentSize.height;
CGFloat lineH = self.textView.font.lineHeight;
CGFloat maxHeight = ceil(lineH * self.maxLine + textView.textContainerInset.top + textView.textContainerInset.bottom);
if (contentSizeH <= maxHeight) {
self.textView.height = contentSizeH;
}else{
self.textView.height = maxHeight;
}
//滚动到选择区域位置
[textView scrollRangeToVisible:NSMakeRange(textView.selectedRange.location, 1)];
//保证圆角效果
textView.layer.cornerRadius = self.textView.height/2;
//修改父视图
CGFloat totalH = ceil(self.textView.height) + 2 * self.topOrBottomEdge;
[UIView animateWithDuration:0.3 animations:^{
self.toolBar.frame = CGRectMake(0, self.keyboardY- totalH, self.width, totalH);
}];
}
键盘输入框联动效果
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