应用程序仅在 iPhone7 上崩溃：致命异常：CALayerInvalidGeometry CALayer 位置包含 NaN：[nan nan]答案

【问题标题】：App crashes on iPhone7 only: Fatal Exception: CALayerInvalidGeometry CALayer position contains NaN: [nan nan]应用程序仅在 iPhone7 上崩溃：致命异常：CALayerInvalidGeometry CALayer 位置包含 NaN：[nan nan]
【发布时间】：2018-03-07 06:48:40
【问题描述】：

我的应用程序在 iPhone6 上运行良好，但是当我在 iPhone7 上测试它时，当我尝试将点调整到图像时它崩溃了。

致命异常：CALayerInvalidGeometry CALayer位置包含NaN：[nan nan]

- (void)adjustPointsToFaceModel {

FaceFeatures *features = self.faceFeaturesModel.features;

CGRect featurePointsBox = [self.view featuresBoundingBox];

[self.view.featurePointsMapping enumerateKeysAndObjectsUsingBlock:^(NSNumber* key, FeaturePointView* view, BOOL *stop) {
    FaceFeaturePoint feature = key.unsignedIntegerValue;
    CGPoint pointCenter = [self.view convertPointFromImage:[features coordinatePointForFeature:feature]];

    if (pointCenter.x < CGRectGetMinX(featurePointsBox)) {
        pointCenter.x = CGRectGetMinX(featurePointsBox);
    }
    if (pointCenter.y < CGRectGetMinY(featurePointsBox)) {
        pointCenter.y = CGRectGetMinY(featurePointsBox);
    }
    if (pointCenter.x > CGRectGetMaxX(featurePointsBox)) {
        pointCenter.x = CGRectGetMaxX(featurePointsBox);
    }
    if (pointCenter.y > CGRectGetMaxY(featurePointsBox)) {
        pointCenter.y = CGRectGetMaxY(featurePointsBox);
    }
    view.center = pointCenter;
}];

[self.view layoutIfNeeded];
}

XCode 说

最后一个异常回溯 (0)

在

[self.view.featurePointsMapping enumerateKeysAndObjectsUsingBlock:^(NSNumber* key, EMFeaturePointView* view, BOOL *stop) {

为此花费了数周时间。欢迎任何帮助！

【问题讨论】：

这个帖子可能会有所帮助：stackoverflow.com/questions/4867968/…

标签： ios objective-c xcode crash

【解决方案1】：

我建议您添加检查以确保 featurePointsBox 矩形不包含任何 NaN 值。

请参阅以下主题： how to check for NaN value in Objective-C (iphone sdk)

【讨论】：