使用UIScreenEdgePanGestureRecognizer写iOS7侧边栏

使用UIScreenEdgePanGestureRecognizer写iOS7侧边栏

#import "RootViewController.h"

@interface RootViewController ()<UIGestureRecognizerDelegate>

{

CGFloat  _centerX;
CGFloat  _centerY;
UIView  *_backgroundView;

}

@end

@implementation RootViewController

- (void)viewDidLoad
{
[super viewDidLoad];

// 存储坐标
_centerX = self.view.bounds.size.width / 2;
_centerY = self.view.bounds.size.height / 2;
self.view.backgroundColor = [UIColor blackColor];

// 屏幕边缘pan手势(优先级高于其他手势)
UIScreenEdgePanGestureRecognizer *leftEdgeGesture = \
[[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self
action:@selector(handleLeftEdgeGesture:)];
leftEdgeGesture.edges = UIRectEdgeLeft;           // 屏幕左侧边缘响应
[self.view addGestureRecognizer:leftEdgeGesture]; // 给self.view添加上

// 设置一个UIView用来替换self.view,self.view用来当做背景使用
_backgroundView = [[UIView alloc] initWithFrame:self.view.bounds];
_backgroundView.backgroundColor = [UIColor yellowColor];
[self.view addSubview:_backgroundView];

// 展示的view
UIView *showView_01 = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 200)];
showView_01.tag = 0x1;
showView_01.backgroundColor = [UIColor redColor];
[_backgroundView addSubview:showView_01];
}

- (void)handleLeftEdgeGesture:(UIScreenEdgePanGestureRecognizer *)gesture
{
// 获取到当前被触摸的view
UIView *view = [self.view hitTest:[gesture locationInView:gesture.view]
withEvent:nil];

NSLog(@"tag = %ld", (long)view.tag);

if(UIGestureRecognizerStateBegan == gesture.state ||
UIGestureRecognizerStateChanged == gesture.state)
{
// 根据被触摸手势的view计算得出坐标值
CGPoint translation = [gesture translationInView:gesture.view];
NSLog(@"%@", NSStringFromCGPoint(translation));

NSLog(@"进行中");

// 进行设置
_backgroundView.center = CGPointMake(_centerX + translation.x, _centerY);
}
else
{
// 恢复设置
[UIView animateWithDuration:.3 animations:^{
_backgroundView.center = CGPointMake(_centerX, _centerY);

}];
}
}

@end

RootViewController.m


处理手势：



效果如下图：



如果想与其他手势并发操作，实现如下代理即可：

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return YES;
}