横竖屏切换

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单一控制器的横竖屏切换

if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)]) {

SEL selector = NSSelectorFromString(@"setOrientation:");

NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];

[invocation setSelector:selector];

[invocation setTarget:[UIDevice currentDevice]];

int val = UIInterfaceOrientationPortrait;

[invocation setArgument:&val atIndex:2];

[invocation invoke];

}

横竖屏切换

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原文地址：http://www.cnblogs.com/ritian/p/5600143.html