//iOS规定不允许强制用代码切换横竖屏
if([[UIDevicecurrentDevice]respondsToSelector:@selector(setOrientation:)]) {
SELselector =NSSelectorFromString(@"setOrientation:");
NSInvocation*invocation = [NSInvocationinvocationWithMethodSignature:[UIDeviceinstanceMethodSignatureForSelector:selector]];
[invocationsetSelector:selector];
[invocationsetTarget:[UIDevicecurrentDevice]];
intval =UIInterfaceOrientationPortrait;
if(UIDeviceOrientationIsPortrait([UIDevicecurrentDevice].orientation)) {
val =UIInterfaceOrientationLandscapeRight;
}
[invocationsetArgument:&valatIndex:2];
[invocationinvoke];
}
