一句demo 显示、点击. 支持自定义

先上图

suspend.gif

1、刚刚开始做是用来给测试人员用,不需要一直打包,然后就用一个固定的UIButton来代替.
2、后面有一个分享有礼功能一直悬浮,离开这个页面时移除.然后才考虑写悬浮按钮
3、因为我们产品需求当前页面能手动点击移除,所以用UIView 来写,高度自定义

悬浮有2种方式能实现

(1)手势 UIPanGestureRecognizer
UIGestureRecognizerStateBegan
UIGestureRecognizerStateChanged
UIGestureRecognizerStateEnded

(2)点击屏幕的几个方法
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
-(void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
-(void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

手势和点击屏幕事件的区别唯一就是获取当前位置不一样

    //点击屏幕事件获取当前位置
    UITouch *touch = [touches anyObject];
    CGPoint currentPosition = [touch locationInView:self];

    // 手势获取当前位置
    CGPoint currentPosition = [pan locationInView:self];

下面用手势来一一讲解

- (void)configurationUI{
    self.backgroundColor = [UIColor redColor];
    //自定义图片~文字等...
    
    //点击手势
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap:)];
    [self addGestureRecognizer:tap];
    //滑动手势
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
    [self addGestureRecognizer:pan];
}
//点击事件
- (void)tap:(UITapGestureRecognizer *)tap{
    if (self.tapBlock) {
        self.tapBlock();
    }
}

//滑动事件
- (void)pan:(UIPanGestureRecognizer *)pan{
    //获取当前位置
    CGPoint currentPosition = [pan locationInView:self];
    if (pan.state == UIGestureRecognizerStateBegan) {
        _originalPoint = currentPosition;
    }else if(pan.state == UIGestureRecognizerStateChanged){
        //偏移量(当前坐标 - 起始坐标 = 偏移量)
        CGFloat offsetX = currentPosition.x - _originalPoint.x;
        CGFloat offsetY = currentPosition.y - _originalPoint.y;
        
        //移动后的按钮中心坐标
        CGFloat centerX = self.center.x + offsetX;
        CGFloat centerY = self.center.y + offsetY;
        self.center = CGPointMake(centerX, centerY);
        
        //父试图的宽高
        CGFloat superViewWidth = self.superview.frame.size.width;
        CGFloat superViewHeight = self.superview.frame.size.height;
        CGFloat btnX = self.frame.origin.x;
        CGFloat btnY = self.frame.origin.y;
        CGFloat btnW = self.frame.size.width;
        CGFloat btnH = self.frame.size.height;
        
        //x轴左右极限坐标
        if (btnX > superViewWidth){
            //按钮右侧越界
            CGFloat centerX = superViewWidth - btnW/2;
            self.center = CGPointMake(centerX, centerY);
        }else if (btnX < 0){
            //按钮左侧越界
            CGFloat centerX = btnW * 0.5;
            self.center = CGPointMake(centerX, centerY);
        }
        
        //默认都是有导航条的，有导航条的，父试图高度就要被导航条占据，固高度不够
        CGFloat defaultNaviHeight = 64;
        CGFloat judgeSuperViewHeight = superViewHeight - defaultNaviHeight;
        
        //y轴上下极限坐标
        if (btnY <= 0){
            //按钮顶部越界
            centerY = btnH * 0.7;
            self.center = CGPointMake(centerX, centerY);
        }
        else if (btnY > judgeSuperViewHeight){
            //按钮底部越界
            CGFloat y = superViewHeight - btnH * 0.5;
            self.center = CGPointMake(btnX, y);
        }
    }else if (pan.state == UIGestureRecognizerStateEnded){
        CGFloat btnWidth = self.frame.size.width;
        CGFloat btnHeight = self.frame.size.height;
        CGFloat btnY = self.frame.origin.y;
        //        CGFloat btnX = self.frame.origin.x;
        //按钮靠近右侧
        switch (_type) {
                
            case WQSuspendViewTypeNone:{
                //自动识别贴边
                if (self.center.x >= self.superview.frame.size.width/2) {
                    
                    [UIView animateWithDuration:0.5 animations:^{
                        //按钮靠右自动吸边
                        CGFloat btnX = self.superview.frame.size.width - btnWidth;
                        self.frame = CGRectMake(btnX, btnY, btnWidth, btnHeight);
                    }];
                }else{
                    
                    [UIView animateWithDuration:0.5 animations:^{
                        //按钮靠左吸边
                        CGFloat btnX = 0;
                        self.frame = CGRectMake(btnX, btnY, btnWidth, btnHeight);
                    }];
                }
                break;
            }
            case WQSuspendViewTypeLeft:{
                [UIView animateWithDuration:0.5 animations:^{
                    //按钮靠左吸边
                    CGFloat btnX = 0;
                    self.frame = CGRectMake(btnX, btnY, btnWidth, btnHeight);
                }];
                break;
            }
            case WQSuspendViewTypeRight:{
                [UIView animateWithDuration:0.5 animations:^{
                    //按钮靠右自动吸边
                    CGFloat btnX = self.superview.frame.size.width - btnWidth;
                    self.frame = CGRectMake(btnX, btnY, btnWidth, btnHeight);
                }];
            }
        }
    }
    
}

NS_ASSUME_NONNULL_BEGIN


@property (nonatomic, copy) void (^tapBlock)(void);

/** 显示 默认为 WQSuspendViewTypeNone*/
+ (void)show;
/** 显示 + 显示的位置*/
+ (void)showWithType:(WQSuspendViewType)type;
/** 显示 + 位置 + 点击的事件 */
+ (void)showWithType:(WQSuspendViewType)type tapBlock:(void (^)(void))tapBlock;
/** 移除 */
+ (void)remove;


NS_ASSUME_NONNULL_END

详细请看demo
附上demo WQSuspendView