iOS开发（iPad/iPhone)设置app界面 默认横向显示的两种方法

方法一：

用文本编辑工具　打开工程属性文件，也就是那个 xx-info.plist文件，把下面蓝色的部分复制进去，保存。重新编译下，OK。

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<plist version="1.0">

<dict>

<key>UIInterfaceOrientation</key>

<string>UIInterfaceOrientationLandscapeRight</string>

<key>UISupportedInterfaceOrientations</key>

<array>

<string>UIInterfaceOrientationLandscapeRight</string>

<string>UIInterfaceOrientationLandscapeLeft</string>

</array>

</dict>

</plist>

方法二：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {

// Return YES for supported orientations

//return (interfaceOrientation == UIInterfaceOrientationPortrait);

//只支持横屏

if(UIInterfaceOrientationIsLandscape(interfaceOrientation))

{

return YES;

}

/*else//只支持竖屏

if(UIInterfaceOrientationIsPortrait(interfaceOrientation))

{

return YES;

}

*/

return NO;

}