Question

我正在研究ios 7＆amp;适用于ios的ios 6 3.5英寸和4英寸屏幕。我正在为这两个版本的闪屏工作。在ios 7 4英寸屏幕上，它显示正确的方式。在具有4英寸屏幕的iOS 6中，它无法正常显示。我有对齐问题。带有3.5英寸的iOS 7也出现了一些对齐问题。但显示3.5英寸的iOS 6。我不知道如何解决对齐问题。这是我的示例代码：

#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v)  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)

if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0"))
{
    splashView=[[UIImageView alloc]initWithFrame:CGRectMake(0, 20, 320, 548)];
    splashView.image=[UIImage imageNamed:@"screens copy.png"];
    [self.view addSubview:splashView];
    splashView.autoresizingMask =  UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin |UIViewAutoresizingFlexibleBottomMargin  | UIViewAutoresizingFlexibleTopMargin;
}
else
{
    splashView=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];
    splashView.image=[UIImage imageNamed:@"small-screen1.PNG"];
    [self.view addSubview:splashView];
    splashView.autoresizingMask =  UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin |UIViewAutoresizingFlexibleBottomMargin  | UIViewAutoresizingFlexibleTopMargin;
}