VictorZhang

转载： https://www.cnblogs.com/wizardface/archive/2012/02/02/2335843.html 最近要写一些hvm虚拟机windows调用xen中hypercall的代码，发现一个问题就是unsigned long在windows中和linux中代表的位数不同，因此想调查一下。 使用测试程序： #include <stdio.h> int main() { printf("unsigned long long: %d\n", si.

原文： http://www.skyfox.org/cocoa-sandbox-app-launch-at-login.html macOS app 开机自启动虽然有很多种方法,但是在需要上架APPStore的情况下,访问沙盒外的文件会被拒绝. 苹果官方提供了两种方式: Service Management framework 和 shared file list There are two ways to add a login item: using the Service Management .

%1$@ %2$@ %1$d %2$d 一段OC代码, 其他语言也类似 NSString *total = @"10"; NSString *sub = @"3"; NSString *enStr = @"%@ of %@"; NSString *chStr = @"%2$@ 个中的 %1$@ 个"; NSString *egLishString = [NSString str...

文章目录1. 二维数组声明 1. 二维数组声明 People *p00 = [[People alloc]initWithName:@"00"]; People *p01 = [[People alloc]initWithName:@"01"]; People *p02 = [[People alloc]initWithName:@"02"]; ...

创建一个完整的单例： #import "SearchDelegate.h" @interface SearchDelegate() <NSCopying,NSMutableCopying> @end static SearchDelegate *sharedSearchDelegate = nil; @implementation SearchDelegate + (inst...

Is it possible to make the -init method private in Objective-C? NS_UNAVAILABLE - (instancetype)init NS_UNAVAILABLE; This is a the short version of the unavailable attribute. It first appeared in ...