IOS开发代码分享之获取启动画面图片的string

本代码支持 iphone 6 以下. 支持 iphone 及 ipad

+(nsstring*)getlaunchimagename
{
     
    nsarray* images= @[@"launchimage.png", @"[e-mail]",@"[e-mail]",@"[e-mail]",@"[e-mail]",@"launchimage-700-portrait@2x~ipad.png",@"launchimage-portrait@2x~ipad.png",@"launchimage-700-portrait~ipad.png",@"launchimage-portrait~ipad.png",@"launchimage-landscape@2x~ipad.png",@"launchimage-700-landscape@2x~ipad.png",@"launchimage-landscape~ipad.png",@"launchimage-700-landscape~ipad.png"];
     
    uiimage *splashimage;
     
    if ([self isdeviceiphone])
    {
        if ([self isdeviceiphone4] && [self isdeviceretina])
        {
            splashimage = [uiimage imagenamed:images[1]];
            if (splashimage.size.width!=0)
                return images[1];
            else
                return images[2];
        }
        else if ([self isdeviceiphone5])
        {
            splashimage = [uiimage imagenamed:images[1]];
            if (splashimage.size.width!=0)
                return images[3];
            else
                return images[4];
        }
        else
            return images[0]; //non-retina iphone
    }
    else if ([[uidevice currentdevice] orientation]==uideviceorientationportrait || [[uidevice currentdevice] orientation] == uideviceorientationportraitupsidedown)//ipad portrait
    {
        if ([self isdeviceretina])
        {
            splashimage = [uiimage imagenamed:images[5]];
            if (splashimage.size.width!=0)
                return images[5];
            else
                return images[6];
        }
        else
        {
            splashimage = [uiimage imagenamed:images[7]];
            if (splashimage.size.width!=0)
                return images[7];
            else
                return images[8];
        }
         
    }
    else
    {
        if ([self isdeviceretina])
        {
            splashimage = [uiimage imagenamed:images[9]];
            if (splashimage.size.width!=0)
                return images[9];
            else
                return images[10];
        }
        else
        {
            splashimage = [uiimage imagenamed:images[11]];
            if (splashimage.size.width!=0)
                return images[11];
            else
                return images[12];
        }
    }
}
 
+(bool)isdeviceiphone
{
    if (ui_user_interface_idiom() == uiuserinterfaceidiomphone)
    {
        return true;
    }
     
    return false;
}
 
+(bool)isdeviceiphone4
{
    if ([[uiscreen mainscreen] bounds].size.height==480)
        return true;
     
    return false;
}
 
 
+(bool)isdeviceretina
{
    if ([[uiscreen mainscreen] respondstoselector:@selector(displaylinkwithtarget:selector:)] &&
        ([uiscreen mainscreen].scale == 2.0))        // retina display
    {
        return true;
    }
    else                                          // non-retina display
    {
        return false;
    }
}
 
 
+(bool)isdeviceiphone5
{
    if (ui_user_interface_idiom() == uiuserinterfaceidiomphone && [[uiscreen mainscreen] bounds].size.height>480)
    {
        return true;
    }
    return false;
}