Open Radar

 
Summary:
Any UIScreenEdgePanGestureRecognizer only fires from time to time, when an edge-pan is performed from the right edge of the device and the device is currently in the interrface orientation landscape left.

Steps to Reproduce:
1. Create a new UIScreenEdgePanGestureRecognizer
2. set "edges" to UIRectEdgeRight
3. Run
4. Rotate the device to landscape left
5. Perform an edge-pan from the right edge of the device
6. the gesture recognizer only fires sporadically

Expected Results:
The gesture recognizer fires every time an edge pan is performed

Actual Results:
The gesture recognizer only fires sporadically, even though an edge-pan from the right edge is performed

Version:
iOS 7.1

Notes:
There is no gesture recognizer dependency or delegate set up, a similar gesture recognizer with "edges" set to UIRectEdgeLeft fires as expected. Here's a sample code to illustrate the problem, when run on device:

- (void)viewDidLoad {
    [super viewDidLoad];

    UIScreenEdgePanGestureRecognizer *edgePanLeft = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(handleEdgePanLeft:)];
    edgePanLeft.edges = UIRectEdgeLeft;
    [self.view addGestureRecognizer:edgePanLeft];

    UIScreenEdgePanGestureRecognizer *edgePanRight = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(handleEdgePanRight:)];
    edgePanRight.edges = UIRectEdgeRight;
    [self.view addGestureRecognizer:edgePanRight];
}

- (void)handleEdgePanLeft:(UIScreenEdgePanGestureRecognizer *)edgePan {
    NSLog(@"left");
}

- (void)handleEdgePanRight:(UIScreenEdgePanGestureRecognizer *)edgePan {
    NSLog(@"right");
}

Configuration:
Tested on iPad 3/4 on iOS 7.0 - iOS 7.1