摘要：
ViewController生命周期alloc -> initWithNibName -> loadView -> viewDidLoad -> viewWillAppear -> viewDidAppear -> viewWillDisappear -> viewDidDisappear -> d... 阅读全文
摘要：
// 点击“相册”按钮-(void)openAlbum{ //打开之前最好判断应用是否拥有打开系统“照片”的权限，同理，扫描之前也最好要判断，此处不赘述 if (!_picker) { _picker = [[UIImagePickerController alloc] init]... 阅读全文