iOS上拉拉出底部菜单，下拉菜单消失 iOS上拉拉出底部菜单，下拉菜

产品经理让做一个仿饿了么底部菜单刚开始显示一部分，上拉时全部显示出来，向下滑时底部菜单再向下滑，只显示一部分，安卓有线程系统提供的，但是iOS系统没有，于是自己写了一个吧，供大家参考使用。
这是m文件内容，h文件内容就不写了，啥都没有

#import "HICDragView.h" @interface HICDragView() @property (nonatomic,strong)UIPanGestureRecognizer *pan; @end @implementation HICDragView -(instancetype)init{if ([super init]) { [self setupPanGesture]; }return self; } -(instancetype)initWithFrame:(CGRect)frame{if ([super initWithFrame:frame]) { [self setupPanGesture]; } return self; } -(void)setupPanGesture{ _pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panAction:)]; _pan.minimumNumberOfTouches = 1; [self addGestureRecognizer:_pan]; } - (void)panAction:(UIPanGestureRecognizer *)pan{CGPoint point = [pan translationInView:pan.view]; if (pan.state == UIGestureRecognizerStateFailed || pan.state == UIGestureRecognizerStateEnded) {if (pan.view.top >= SCREEN_HEIGHT-395 && pan.view.top <= SCREEN_HEIGHT-395+130) {[UIView animateWithDuration:0.1 animations:^{ pan.view.transform = CGAffineTransformIdentity; [pan setTranslation:CGPointZero inView:pan.view]; }]; }if (pan.view.top > SCREEN_HEIGHT-395+130 && pan.view.top <=SCREEN_HEIGHT-395+260) { [UIView animateWithDuration:0.1 animations:^{ pan.view.transform = CGAffineTransformMakeTranslation(0, 260); [pan setTranslation:CGPointZero inView:pan.view]; }]; }}if ((pan.view.top >= SCREEN_HEIGHT-395 && pan.view.top <= SCREEN_HEIGHT-395+260)&& point.y>0) { pan.view.transform =CGAffineTransformTranslate(pan.view.transform,0, point.y); [pan setTranslation:CGPointZero inView:pan.view]; if (pan.view.top >= SCREEN_HEIGHT-395+260) { pan.view.transform =CGAffineTransformTranslate(pan.view.transform,0, -point.y); [pan setTranslation:CGPointZero inView:pan.view]; }} if ((pan.view.top <= SCREEN_HEIGHT-395+260 && pan.view.top > SCREEN_HEIGHT-395) && point.y <0) { pan.view.transform =CGAffineTransformTranslate(pan.view.transform,0, point.y); [pan setTranslation:CGPointZero inView:pan.view]; if (pan.view.top <= SCREEN_HEIGHT-395) { pan.view.transform =CGAffineTransformTranslate(pan.view.transform,0, -point.y); [pan setTranslation:CGPointZero inView:pan.view]; } }//pan.view.transform =CGAffineTransformMakeTranslation(point.x, point.y); } @end

【iOS上拉拉出底部菜单，下拉菜单消失】外面使用时：

HICDragView * view = [[HICDragView alloc] init]; view.backgroundColor = [UIColor yellowColor]; [self.view addSubview:view]; [view mas_makeConstraints:^(MASConstraintMaker *make) { make.left.right.equalTo(self.view); make.bottom.equalTo(self.view); make.height.mas_equalTo(395); }]; view.transform = CGAffineTransformMakeTranslation(0, 260); //默认向下偏移了个260