摘要：-(void)tryRun { tryTimes++; id obj = [ASODataManager getAppleAccount]; if (obj) { __block FirstViewController* sf = self; //有账号，可以开始获取数据 [[ASODataMana 阅读全文

摘要：?: 变量在使用过程中可能存在空值，则需要用？标记，否则赋空值会报错 ? 1 2 var mustNoNilValue: String = "Swift" var canNilValue: String? = nil ? 1 2 var mustNoNilValue: String = "Swift 阅读全文

摘要：NSBundle* bundle = [NSBundle bundleWithPath:[[NSBundle mainBundle].resourcePath stringByAppendingPathComponent:@"bundleName"]]; UIImage* img = [UIImag 阅读全文