摘要： 1 下载2 解压依次安装里面的3个文件mysql5.5.xxx.pkgMySQLstartupitem.pkgMySQLPrefPane3. 从系统属性那里可以点击启动“Start MySQL Server”，或者Terminalsudo /usr/local/mysql/support-files/mysql.server start 4. 查看安装好的版本/usr/local/mysql/bin/mysql -v"\q" 退出。5. 添加快捷方式1）进入主目录cd ;2）编辑 ".bash_profile" 文件，如果没有就创建一个nano .bas 阅读全文

摘要： // look for binary path.# which mysql_install_db/usr/local/bin/mysql_install_db// look for binary path.# which my_print_defaults/usr/local/bin/my_print_defaults// set basedir to /usr/local/usr/local/bin/mysql_install_db --basedir=/usr/local 阅读全文

摘要： 如果你brew install mysql 之后出现问题要卸载：brew remove mysqlbrew cleanuplaunchctl unload -w ~/Library/LaunchAgents/com.mysql.mysqld.plistrm ~/Library/LaunchAgents/com.mysql.mysqld.plistsudo rm -rf /usr/local/var/mysql然后重新开始installed mysql withbrew install mysqlran the commands brew suggested:unset TMPDIRmysql_ 阅读全文

摘要： NSMutableArray *ar = [self.navigationItem.leftBarButtonItems mutableCopy];[ar removeObject:backItem];[self.navigationItem setLeftBarButtonItems:ar]; 阅读全文

摘要： 你可能会这样@interfaceFoo:NSObject{ id delegate;}@property(weak) id delegate;但是会出现错误，说要用__weak, 那就加上@interfaceFoo:NSObject{ __weak id delegate;}@property(weak) id delegate;这样就可以了，注意的是如果property声明的是weak，那么变量也要作为weak来存储。 阅读全文

摘要： networksetup -listallnetworkservices得到所有接口（interfaces）.networksetup -setdnsservers {INTERFACE NAME} {YOUR DNS SERVER}设置DNS.networksetup -setdnsservers {INTERFACE NAME} {YOUR DNS SERVER} {YOUR DNS SERVER}如果有多个DNS，那么用空格隔开。之后就可以用ifconfig查看修改了。 阅读全文

摘要： 1 FBRequestConnection *connection = [[FBRequestConnection alloc] init];2 [connection addRequest:[FBRequest requestForMyFriends] completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {3 4 }]; 阅读全文

摘要： - (void) searchDisplayControllerWillBeginSearch:(UISearchDisplayController *)controller{ [searchBar setShowsCancelButton:YES]; for (UIView *v in searchBar.subviews) { if ([v isKindOfClass:[UIButton class]]) { [(UIButton *)v setTitle:@"返回" forState:UIControlStateNormal]; ... 阅读全文

摘要： 1 选择工程的Target -> Build Settings -> Preprocessor Macros.如图，默认 Debug项，是“DEBUG＝1”.2 在程序中设置全局宏定义在程序的 ApplicationName-Prefix.pch 文件中，加入如下，很简单#ifdef DEBUG#define DLog( s, ... ) NSLog( @"<%p %@:(%d)> %@", self, [[NSString stringWithUTF8String:__FILE__] lastPathComponent], __LINE__, [N 阅读全文