126 lines
4.2 KiB
Objective-C
126 lines
4.2 KiB
Objective-C
//
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// KBKeyboardMaskView.m
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// keyBoard
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//
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// Created by Mac on 2025/11/27.
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//
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#import "KBKeyboardMaskView.h"
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@interface KBKeyboardMaskView ()
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@property (nonatomic, strong) UIButton *backButton;
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@property (nonatomic, strong) FLAnimatedImageView *gifView;
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@property (nonatomic, assign) CGFloat keyboardHeight;
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@end
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@implementation KBKeyboardMaskView
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- (instancetype)initWithFrame:(CGRect)frame {
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self = [super initWithFrame:frame];
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if (!self) return nil;
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self.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.55];
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self.userInteractionEnabled = YES;
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// 返回按钮
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_backButton = [UIButton buttonWithType:UIButtonTypeCustom];
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UIImage *backImg = [UIImage imageNamed:@"close_white2_icon"];
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[_backButton setImage:backImg forState:UIControlStateNormal];
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[self addSubview:_backButton];
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[_backButton mas_makeConstraints:^(MASConstraintMaker *make) {
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make.left.equalTo(self).offset(9);
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if (@available(iOS 11.0, *)) {
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make.top.equalTo(self.mas_safeAreaLayoutGuideTop).offset(4);
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} else {
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make.top.equalTo(self).offset(40);
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}
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make.width.height.mas_equalTo(40);
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}];
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// GIF 区域
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_gifView = [FLAnimatedImageView new];
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_gifView.contentMode = UIViewContentModeScaleAspectFit;
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_gifView.clipsToBounds = YES;
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[self addSubview:_gifView];
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// 尺寸固定：宽=屏幕宽，高=300；位置在 layoutSubviews 里根据键盘高度动态计算
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CGFloat screenW = UIScreen.mainScreen.bounds.size.width;
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[_gifView mas_makeConstraints:^(MASConstraintMaker *make) {
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make.centerX.equalTo(self);
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make.width.mas_equalTo(screenW);
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make.height.mas_equalTo(300);
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// 竖直方向不在这里约束，由 layoutSubviews 手动布局
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}];
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// 整个蒙层点击：激活输入框
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UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onTapMask:)];
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[self addGestureRecognizer:tap];
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// 加载 GIF 资源（占位名，可按需更换为实际文件名）
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NSString *gifPath = [[NSBundle mainBundle] pathForResource:@"kb_guide_keyboard" ofType:@"gif"];
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if (gifPath.length > 0) {
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NSData *data = [NSData dataWithContentsOfFile:gifPath];
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if (data.length > 0) {
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FLAnimatedImage *img = [FLAnimatedImage animatedImageWithGIFData:data];
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_gifView.animatedImage = img;
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}
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}
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return self;
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}
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- (void)layoutSubviews {
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[super layoutSubviews];
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// 根据键盘高度，保证 GIF 不被遮挡：
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// - 无键盘：居中显示；
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// - 有键盘：底部距离键盘上方 20pt，若空间不足则向上顶到顶部预留的 safe 区域。
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CGFloat viewH = CGRectGetHeight(self.bounds);
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CGFloat gifH = 300.0;
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CGFloat topMargin = 80.0; // 预留给返回按钮和标题等
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CGFloat bottomMargin = 20.0;
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CGFloat y = 0;
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if (self.keyboardHeight <= 0) {
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// 无键盘：垂直居中
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y = (viewH - gifH) * 0.5;
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if (y < topMargin) y = topMargin;
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} else {
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CGFloat maxBottom = viewH - self.keyboardHeight - bottomMargin;
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y = maxBottom - gifH;
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if (y < topMargin) y = topMargin;
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}
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CGRect frame = self.gifView.frame;
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frame.origin.y = y;
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self.gifView.frame = frame;
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}
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- (void)onTapMask:(UITapGestureRecognizer *)gr {
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CGPoint p = [gr locationInView:self];
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// 如果点在返回按钮区域内，则不走 tapHandler（交由按钮自己的事件处理）
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if (CGRectContainsPoint(self.backButton.frame, p)) {
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return;
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}
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if (self.tapHandler) {
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self.tapHandler();
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}
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}
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- (void)updateForKeyboardHeight:(CGFloat)kbHeight
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duration:(NSTimeInterval)duration
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curve:(UIViewAnimationOptions)curve {
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self.keyboardHeight = MAX(kbHeight, 0);
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// 触发布局刷新，以便在 layoutSubviews 里根据最新键盘高度重算 gifView 的 Y 值
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[self setNeedsLayout];
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[UIView animateWithDuration:duration
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delay:0
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options:curve
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animations:^{
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[self layoutIfNeeded];
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}
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completion:nil];
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}
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@end
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