摘要：
In iOS we can press the HOME and the POWER button together at any time and a screenshot of what’s currently being displayed will be saved to the Camer 阅读全文
摘要：
1.File's owner 不需要关联，只需关联根view的class 2.如果还是crash，则右击检查File's owner是否还有子view关联着它 PS:初始化方法示例： + (instancetype)initFromNib { NSArray *nib = [[NSBundle ma 阅读全文