2.28学习内容，android，dialog自定义宽高、ios判断网络可用性

android设定dialog宽高读：

http://blog.csdn.net/true100/article/details/43982763

mDialog = new Dialog(getActivity(), R.style.IsDelDialog);//自定义的样式，没有贴出代码来
mDialog.setContentView(view);
Window dialogWindow = mDialog.getWindow();
WindowManager m = getActivity().getWindowManager();
Display d = m.getDefaultDisplay(); // 获取屏幕宽、高度
WindowManager.LayoutParams p = dialogWindow.getAttributes(); // 获取对话框当前的参数值
p.height = (int) (d.getHeight() * 0.8); // 高度设置为屏幕的0.6，根据实际情况调整
p.width = (int) (d.getWidth() * 0.8); // 宽度设置为屏幕的0.65，根据实际情况调整
dialogWindow.setAttributes(p);
mDialog.show();

iphone判断网络可用性

http://blog.csdn.net/chadeltu/article/details/43983259

#include<netinet/in.h>
#import<SystemConfiguration/SCNetworkReachability.h>

//判断当前网络连接状态
-(BOOL)isNetworkAvailable
{
//创建零地址，0.0.0.0的地址表示查询本机的网络连接状态
struct sockaddr_in zeroAddress;
bzero(&zeroAddress, sizeof(zeroAddress));
zeroAddress.sin_len = sizeof(zeroAddress);
zeroAddress.sin_family = AF_INET;

// Recover reachability flags
SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress);
SCNetworkReachabilityFlags flags;

//获得连接的标志
BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);
CFRelease(defaultRouteReachability);

//如果不能获取连接标志，则不能连接网络，直接返回
if (!didRetrieveFlags)
{
return NO;
}

//根据获得的连接标志进行判断
BOOL isReachable = flags & kSCNetworkFlagsReachable;
BOOL needsConnection = flags & kSCNetworkFlagsConnectionRequired;
return (isReachable && !needsConnection) ? YES : NO;

}

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