MiMO_iOS/MiMoLive/Classes/Login/View/MOInputCodeView.m

//
//  MOInputCodeView.m
//  MiMoLive
//
//  Created by MiMo on 2025/6/3.
//

#import "MOInputCodeView.h"

@interface MOInputCodeView ()<UITextFieldDelegate>
@property (nonatomic, strong) UITextField *hiddenField;
@property (nonatomic, strong) NSMutableArray<UILabel *> *digitLabels;
@property (nonatomic, strong) UIView *cursorView;

@end

@implementation MOInputCodeView

- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [self setupUI];
    }
    return self;
}

- (void)setupUI {
    self.digitLabels = [NSMutableArray array];
    UIImage *slotBg = [UIImage imageNamed:@"img_login_code_bg"];
    CGFloat boxSize = kScaleWidth(64);
    CGFloat spacing = kScaleWidth(24);
    NSInteger count = 4;

    for (int i = 0; i < count; i++) {
        UIImageView *box = [[UIImageView alloc] initWithImage:slotBg];
        box.contentMode = UIViewContentModeScaleToFill;
        box.userInteractionEnabled = NO;
        [self addSubview:box];

        [box mas_makeConstraints:^(MASConstraintMaker *make) {
            make.size.mas_equalTo(CGSizeMake(boxSize, boxSize));
            make.left.mas_equalTo(i * (boxSize + spacing));
            make.top.bottom.equalTo(self);
        }];

        UILabel *label = [[UILabel alloc] init];
        label.font = [MOTextTools poppinsMediumFont:32];
        label.textAlignment = NSTextAlignmentCenter;
        label.textColor = kBaseTextColor_1;
        [box addSubview:label];
        [label mas_makeConstraints:^(MASConstraintMaker *make) {
            make.edges.equalTo(box);
        }];

        [self.digitLabels addObject:label];
    }

    self.hiddenField = [[UITextField alloc] init];
    self.hiddenField.keyboardType = UIKeyboardTypeNumberPad;
    self.hiddenField.textColor = UIColor.clearColor;
    self.hiddenField.tintColor = UIColor.clearColor;
    self.hiddenField.delegate = self;
    [self.hiddenField addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
    [self addSubview:self.hiddenField];
    [self.hiddenField mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self);
    }];
    
    self.cursorView = [[UIView alloc] init];
    self.cursorView.backgroundColor = [MOTools colorWithHexString:@"#4363FF"];
    self.cursorView.hidden = YES;
    self.cursorView.layer.cornerRadius = 1;
    self.cursorView.layer.masksToBounds = YES;
    [self addSubview:self.cursorView];
    [self.cursorView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.width.mas_equalTo(2);
        make.height.mas_equalTo(24);
        make.center.equalTo(self); // 初始占位，稍后更新位置
    }];

    // 添加光标闪烁动画
    CABasicAnimation *blink = [CABasicAnimation animationWithKeyPath:@"opacity"];
    blink.fromValue = @1.0;
    blink.toValue = @0.0;
    blink.duration = 0.8;
    blink.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    blink.autoreverses = YES;
    blink.repeatCount = HUGE_VALF;
    [self.cursorView.layer addAnimation:blink forKey:@"blink"];
}

- (void)showKeyboard {
    [self.hiddenField becomeFirstResponder];
    [self moveCursorToIndex:0];
}

- (void)textFieldDidChange:(UITextField *)textField {
    NSString *text = textField.text;
    if (text.length > 4) {
        text = [text substringToIndex:4];
        textField.text = text;
    }
    for (int i = 0; i < 4; i++) {
        UILabel *label = self.digitLabels[i];
        if (i < text.length) {
            label.text = [text substringWithRange:NSMakeRange(i, 1)];
        } else {
            label.text = @"";
        }
    }
    if (text.length == 4 && self.inputCompleted) {
        self.inputCompleted(text);
    }
    
    NSInteger index = text.length; // 下一个待输入框索引
    if (index >= 0 && index < self.digitLabels.count) {
        UILabel *targetLabel = self.digitLabels[index];
        [self.cursorView mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.width.mas_equalTo(2);
            make.height.mas_equalTo(24);
            make.center.equalTo(targetLabel);
        }];
        self.cursorView.hidden = NO;
    } else {
        self.cursorView.hidden = YES;
    }
}

- (void)clear {
    self.hiddenField.text = @"";
    for (UILabel *label in self.digitLabels) {
        label.text = @"";
    }
    self.cursorView.hidden = NO;
    [self moveCursorToIndex:0];
}

- (void)moveCursorToIndex:(NSInteger)index {
    if (index >= 0 && index < self.digitLabels.count) {
        UILabel *targetLabel = self.digitLabels[index];
        [self.cursorView mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.width.mas_equalTo(2);
            make.height.mas_equalTo(24);
            make.center.equalTo(targetLabel);
        }];
        self.cursorView.hidden = NO;
    } else {
        self.cursorView.hidden = YES;
    }
}

@end