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摘要： Provider Communication with Apple Push Notification ServiceThis chapter describes the interfaces(接口) that providers use for communication with Apple Push Notification service (APNs) and discusses some of the functions that providers are expected to fulfill（满足、实行）.General Provider RequirementsAs a pr 阅读全文

摘要： 参考代码：UIImage *oriImage = [UIImage imageNamed:@"xxx.png"];NSString *imagePath = @"/Documents/01.png";NSData* imageData = UIImagePNGRepresentation(oriImage);[imageData writeToFile:imagePath atomically:YES];保存一个Image到一个指定的路径 阅读全文