keyboard/keyBoard/Class/Me/VC/KBFeedBackVC.m

#import "KBFeedBackVC.h"
#import <Masonry/Masonry.h>

@interface KBFeedBackVC () <UITextViewDelegate>

/// 输入卡片容器视图
@property (nonatomic, strong) UIView *inputCardView;
/// 文本输入框
@property (nonatomic, strong) UITextView *textView;
/// 占位提示标签：“Please Enter The Content”
@property (nonatomic, strong) UILabel *placeholderLabel;
/// 右下角字数统计 “0/100”
@property (nonatomic, strong) UILabel *countLabel;
/// 底部提交按钮
@property (nonatomic, strong) UIButton *commitButton;

/// 最大输入字数
@property (nonatomic, assign) NSInteger maxCount;

@end

@implementation KBFeedBackVC

- (void)viewDidLoad {
    [super viewDidLoad];
    // 背景色与其他设置页一致
    self.view.backgroundColor = [UIColor colorWithWhite:0.97 alpha:1.0];
    self.kb_titleLabel.text = KBLocalized(@"Feedback");

    self.maxCount = 100;

    // 添加子视图
    [self.view addSubview:self.inputCardView];
    [self.inputCardView addSubview:self.textView];
    [self.inputCardView addSubview:self.placeholderLabel];
    [self.inputCardView addSubview:self.countLabel];
    [self.view addSubview:self.commitButton];

    // 输入卡片布局
    [self.inputCardView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.view).offset(KB_NAV_TOTAL_HEIGHT + 16);
        make.left.equalTo(self.view).offset(16);
        make.right.equalTo(self.view).offset(-16);
        make.height.mas_equalTo(220);
    }];

    // 文本输入框布局
    [self.textView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.inputCardView).offset(16);
        make.left.equalTo(self.inputCardView).offset(16);
        make.right.equalTo(self.inputCardView).offset(-16);
        make.bottom.equalTo(self.inputCardView).offset(-32);
    }];

    // 占位文字布局（叠在 textView 左上）
    [self.placeholderLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.textView).offset(2);
        make.left.equalTo(self.textView).offset(4);
    }];

    // 字数统计布局（卡片右下角）
    [self.countLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.right.equalTo(self.inputCardView).offset(-16);
        make.bottom.equalTo(self.inputCardView).offset(-10);
    }];

    // 底部提交按钮布局
    [self.commitButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.view).offset(24);
        make.right.equalTo(self.view).offset(-24);
        make.bottom.equalTo(self.view).offset(-KB_SAFE_BOTTOM - 24);
        make.height.mas_equalTo(56);
    }];
}

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

#pragma mark - Actions

/// 提交按钮点击（后续在此方法内实现具体提交逻辑）
- (void)onTapCommit {
    NSString *content = self.textView.text ?: @"";
    // TODO: 在这里处理提交逻辑，例如校验 + 上报接口等
}

#pragma mark - UITextViewDelegate

// 文本变化时更新占位和字数
- (void)textViewDidChange:(UITextView *)textView {
    // 超出最大字数时截断
    if (textView.text.length > self.maxCount) {
        textView.text = [textView.text substringToIndex:self.maxCount];
    }
    self.placeholderLabel.hidden = textView.text.length > 0;
    self.countLabel.text = [NSString stringWithFormat:@"%ld/%ld",
                            (long)textView.text.length,
                            (long)self.maxCount];
}

#pragma mark - Lazy Load

- (UIView *)inputCardView {
    if (!_inputCardView) {
        _inputCardView = [UIView new];
        _inputCardView.backgroundColor = [UIColor whiteColor];
        _inputCardView.layer.cornerRadius = 16.0;
        _inputCardView.layer.masksToBounds = YES;
    }
    return _inputCardView;
}

- (UITextView *)textView {
    if (!_textView) {
        _textView = [[UITextView alloc] init];
        _textView.delegate = self;
        _textView.backgroundColor = [UIColor clearColor];
        _textView.font = [UIFont systemFontOfSize:16];
        _textView.textColor = [UIColor blackColor];
        _textView.textContainerInset = UIEdgeInsetsZero;
        _textView.textContainer.lineFragmentPadding = 0;
        _textView.keyboardDismissMode = UIScrollViewKeyboardDismissModeOnDrag;
    }
    return _textView;
}

- (UILabel *)placeholderLabel {
    if (!_placeholderLabel) {
        _placeholderLabel = [UILabel new];
        _placeholderLabel.textColor = [UIColor colorWithWhite:0.75 alpha:1.0];
        _placeholderLabel.font = [UIFont systemFontOfSize:16];
        _placeholderLabel.text = KBLocalized(@"Please Enter The Content");
    }
    return _placeholderLabel;
}

- (UILabel *)countLabel {
    if (!_countLabel) {
        _countLabel = [UILabel new];
        _countLabel.textColor = [UIColor colorWithWhite:0.7 alpha:1.0];
        _countLabel.font = [UIFont systemFontOfSize:14];
        _countLabel.textAlignment = NSTextAlignmentRight;
        _countLabel.text = @"0/100";
    }
    return _countLabel;
}

- (UIButton *)commitButton {
    if (!_commitButton) {
        _commitButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [_commitButton setTitle:KBLocalized(@"Commit") forState:UIControlStateNormal];
        [_commitButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        _commitButton.titleLabel.font = [UIFont systemFontOfSize:20 weight:UIFontWeightSemibold];
        // 使用与修改昵称弹窗相近的主色
        _commitButton.backgroundColor = [UIColor colorWithRed:0.02 green:0.75 blue:0.67 alpha:1.0];
        _commitButton.layer.cornerRadius = 28.0;
        _commitButton.layer.masksToBounds = YES; // 胶囊按钮
        [_commitButton addTarget:self action:@selector(onTapCommit) forControlEvents:UIControlEventTouchUpInside];
    }
    return _commitButton;
}

@end