简单的拖动手势控制侧拉view显示

通过 UIPanGestureRecognizer  手势来控制侧拉view的显示

在QHLViewController.m文件中,先添加一些宏定义和参数等等。

#define QHLAnimatingDuration 0.5
#define QHLMainViewMaxOffsetX 250
#define QHLLeftViewOriginX -50

typedef enum{
    QHLViewControllerStateClosed = ,
    QHLViewControllerStateOpening,
    QHLViewControllerStateOpened,
    QHLViewControllerStateClosing
}QHLViewControllerState;

@interface QHLViewController ()<UITableViewDataSource>

@property (nonatomic, assign) CGPoint point;
@property (nonatomic, assign) CGPoint location;
@property (nonatomic, strong) UIView *leftV;
@property (nonatomic, strong) UIView *mainV;

@property (nonatomic, strong) UITapGestureRecognizer *tapGesTureR;
@property (nonatomic, strong) UIPanGestureRecognizer *panGesTureR;
@property (nonatomic, assign) QHLViewControllerState state;
@end

在viewWillAppear:(BOOL)animated方法中，创建需要的leftV和mainV这两个view

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    //创建并设置leftV的属性
    UITableView *leftV = [[UITableView alloc] initWithFrame:CGRectMake(QHLLeftViewOriginX, , self.view.bounds.size.width, self.view.bounds.size.height)];
    leftV.backgroundColor = [UIColor whiteColor];
    leftV.dataSource = self;
    self.leftV = leftV;
    [self.view addSubview:leftV];

    //创建并设置mainView的属性
    UIView *mainV = [[UIView alloc] initWithFrame:self.view.bounds];
    mainV.backgroundColor = [UIColor purpleColor];
    self.mainV = mainV;
    [self.view addSubview:mainV];
}

在viewDidLoad中先设置自身的状态为关闭,创建拖动和点击的手势,并且先添加拖动手势到控制器

- (void)viewDidLoad {
    [super viewDidLoad];
    //设置默认状态下自身控制器的state状态
    self.state = QHLViewControllerStateClosed;

    //添加拖动手势
    self.panGesTureR = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(observePanGestureRecognizer:)];
    [self.view addGestureRecognizer:self.panGesTureR];

    //设置点击手势
    self.tapGesTureR =[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(observeTapGesTureRecognizer:)];
}

根据手势的不同状态来实现手势的触发方法,在不同手势状态下,给自身设置不同的state。

/**
 *  拖动手势的实现方法
 */
- (void)observePanGestureRecognizer:(UIPanGestureRecognizer *)panGestureRecognizer {
    //获取当前拖动手势的状态
    UIGestureRecognizerState state = panGestureRecognizer.state;

    CGPoint location = [panGestureRecognizer locationInView:self.view]; //位置

    CGRect main = self.mainV.frame;
    CGRect left = self.leftV.frame;

    switch (state) {
            //手势开始时候
        case UIGestureRecognizerStateBegan:
            //获取开始位置的point
            self.point = location;

            //根据手势触发之前的自身状态来设置现在的状态
            if (self.state == QHLViewControllerStateClosed) {
                self.state = QHLViewControllerStateOpening;  //opening
            } else {
                self.state = QHLViewControllerStateClosing;  //closing
            }
            break;

            //手势变化时候
        case UIGestureRecognizerStateChanged:
        {
            //偏移量x
            CGFloat offsetX = ;

            //下面2种情况,offsetX都是大于等于0的
            if (self.state == QHLViewControllerStateOpening) { //此时自身状态只有QHLViewControllerStateOpening和QHLViewControllerStateClosing
                offsetX = location.x - self.point.x;
            } else {
                offsetX = QHLMainViewMaxOffsetX - (self.point.x - location.x);
            }

            if (offsetX > QHLMainViewMaxOffsetX) {

                left.origin.x = ;
                main.origin.x = QHLMainViewMaxOffsetX;
            } else if (offsetX < ) {

                left.origin.x = QHLLeftViewOriginX;
                main.origin.x = ;
            }else {

                main.origin.x = offsetX;
                left.origin.x = QHLLeftViewOriginX - offsetX * QHLLeftViewOriginX / QHLMainViewMaxOffsetX;
            }
            self.mainV.frame = main;
            self.leftV.frame = left;
            break;
        }
            //手势结束时候
        case UIGestureRecognizerStateEnded:
        {  //结束之前的那一刻,只会有2种状态 QHLViewControllerStateOpening 和 QHLViewControllerStateClosing
            CGFloat endX = main.origin.x;

            if (self.state == QHLViewControllerStateOpening) {  // x 取值 >= 0

                if (endX == QHLMainViewMaxOffsetX) { // 结束时候的 x  取最大值

                    self.state = QHLViewControllerStateOpened;
                } else if (endX > QHLMainViewMaxOffsetX / ) { // 结束时候的 x  大于 最大值的 1/2

                    [self animatingOpen];
                } else { // 结束时候的 x  小于 最大值的 1/2

                    [self animatingClose];
                }

            } else { // x 取值 0 ~ 250

                if (endX > QHLMainViewMaxOffsetX / ) {
                    [self animatingOpen];
                } else {
                    [self animatingClose];
                }
            }
            break;
        }
    }
}

点击手势要等mainV偏移量达到最大的时候才添加进去！！！

/**
 *  点击手势的实现方法
 */
- (void)observeTapGesTureRecognizer:(UITapGestureRecognizer *)tapGestureRecognizer {
    [UIView animateWithDuration:QHLAnimatingDuration animations:^{
        self.mainV.frame = [UIScreen mainScreen].bounds;
        self.leftV.frame = CGRectMake(QHLLeftViewOriginX, , self.view.frame.size.width, self.view.frame.size.height);
    } completion:^(BOOL finished) {
        self.state = QHLViewControllerStateClosed;
    }];
}

当mainV的偏移量达到一定要求后就会调用下面2个方法

当以动画形式打开 在完成时候,添加点击手势

当以动画形式关闭 在完成时候,移除点击手势

/**
 *  以动画形式打开
 */
- (void)animatingOpen {
    CGRect main = self.mainV.frame;

    [UIView animateWithDuration:0.5 delay: usingSpringWithDamping:0.7 initialSpringVelocity:0.7 options:UIViewAnimationOptionAllowAnimatedContent animations:^{
        self.mainV.frame = CGRectMake(QHLMainViewMaxOffsetX, , main.size.width, main.size.height);
        self.leftV.frame = self.view.bounds;
    } completion:^(BOOL finished) {
        //设置state状态
        self.state = QHLViewControllerStateOpened;
        //添加点击手势
        [self.mainV addGestureRecognizer:self.tapGesTureR];
    }];
}

/**
 *  以动画形式关闭
 */
- (void)animatingClose {
    CGRect main = self.mainV.frame;

    [UIView animateWithDuration:0.5 delay: usingSpringWithDamping:1.0 initialSpringVelocity:0.7 options:UIViewAnimationOptionAllowAnimatedContent animations:^{
        self.mainV.frame = self.view.bounds;
        self.leftV.frame =CGRectMake(QHLLeftViewOriginX, , main.size.width, main.size.height);
    } completion:^(BOOL finished) {
        //设置state状态
        self.state = QHLViewControllerStateClosed;
        //移除点击手势
        [self.mainV removeGestureRecognizer:self.tapGesTureR];
    }];
}

侧拉leftV的dataSource方法

#pragma mark - table view delegate & data source
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return ;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *ID = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];

    if (!cell) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:ID];
    }

    cell.textLabel.text = [NSString stringWithFormat:@"Message - %ld",(long)indexPath.row];

    return cell;
}

对于QQ左上角按钮点击之后弹出的设置页面   导航控制器的bar和底部的tabBar会跟随着移动，有知道的大牛给点思路！！！！

渣渣已经脑细胞死光了v_v