m0_37660341的博客

ac = UIAlertController(title: "图片保存失败", message: error.localizedDescription, preferredStyle: .alert)ac =UIAlertController(title:"截图已保存到照片",message:nil,preferredStyle: .alert)//读取选择的图片,info[UIImagePickerController.InfoKey.editedImage]是编辑后的图片。//保存到自己的目录。

具体程序如下：在AppDelegate的加载完成方法中初始化窗口- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{ self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; //在iOS的较高版本中要求增加ro...

IOS开发-swift流程控制使用if和switch来生成条件语句，使用for-in、while和repeat-while来生成循环。条件或循环变量周围的圆括号是可选的。主体外面的大括号是必须的。let individualScores = [75, 43, 103, 87, 12]var teamScore = 0for score in individualScores {if score > 50 {teamScore += 3} else {teamScore