轉(zhuǎn)載:http://www.cnblogs.com/lear/p/5051818.html
1、屏蔽AppDelegate下面的屏幕旋轉(zhuǎn)方法#pragma mark - 屏幕旋轉(zhuǎn)的//- (UIInterfaceOrientationMask)application:(UIApplication*)application supportedInterfaceOrientationsForWindow:(UIWindow*)window//{//? ? return UIInterfaceOrientationMaskPortrait;//}2、對UINavigationController和UITabBarController寫兩個擴展類別,此東西不需要在具體的ViewController中引用UINavigationController+Autorotate.h復制代碼////? UINavigationController+Autorotate.h//? fitmiss////? Created by bill on 15/12/16.//? Copyright ? 2015年 lear. All rights reserved.//#import@interface UINavigationController (Autorotate)@end復制代碼UINavigationController+Autorotate.m復制代碼////? UINavigationController+Autorotate.m//? fitmiss////? Created by bill on 15/12/16.//? Copyright ? 2015年 lear. All rights reserved.//#import "UINavigationController+Autorotate.h"@implementation UINavigationController (Autorotate)- (BOOL)shouldAutorotate{? ? return [self.topViewController shouldAutorotate];}- (NSUInteger)supportedInterfaceOrientations{? ? return [self.topViewController supportedInterfaceOrientations];}- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{? ? return [self.topViewController preferredInterfaceOrientationForPresentation];}@end復制代碼UITabBarController+Autorotate.h復制代碼////? UITabBarController+Autorotate.h//? fitmiss////? Created by bill on 15/12/16.//? Copyright ? 2015年 lear. All rights reserved.//#import@interface UITabBarController (Autorotate)
@end
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UITabBarController+Autorotate.m
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//
//? UITabBarController+Autorotate.m
//? fitmiss
//
//? Created by bill on 15/12/16.
//? Copyright ? 2015年 lear. All rights reserved.
//
#import "UITabBarController+Autorotate.h"
@implementation UITabBarController (Autorotate)
- (BOOL)shouldAutorotate
{
return [self.selectedViewController shouldAutorotate];
}
- (NSUInteger)supportedInterfaceOrientations
{
return [self.selectedViewController supportedInterfaceOrientations];
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return [self.selectedViewController preferredInterfaceOrientationForPresentation];
}
@end
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3.在使用的ViewController中的再次重寫這三個方法,可以在根ViewController中重寫如下方法,就能實現(xiàn)豎屏,子ViewController再重寫實現(xiàn)旋轉(zhuǎn)
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- (BOOL)shouldAutorotate{
//是否允許轉(zhuǎn)屏
return NO;
}
- (UIInterfaceOrientationMask)supportedInterfaceOrientations
{
//viewController所支持的全部旋轉(zhuǎn)方向
return UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight;
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
//viewController初始顯示的方向
return UIInterfaceOrientationPortrait;
}
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注意:在使用的時候發(fā)現(xiàn)在ios9以下的版本出現(xiàn)一個奇怪的問題,就是編譯出來的app默認是橫的,解決辦法是看app.plist下面Supported interface orientations里的列表中,正屏的是不是排在第一個。
摘自網(wǎng)上網(wǎng)友的回復內(nèi)容,如下:
以下方法僅對deploy target大于等于iOS6的工程有效,如果題主的應用需要支持iOS5(默哀),請pass。
在info.plist中設置方向,包含你需要的所有方向,以題中意,UpSideDown和LandScapeLeft;
繼承UITabBarController,override以下三個方法
- (BOOL)shouldAutorotate
{
return [self.selectedViewController shouldAutorotate];
}
- (NSUInteger)supportedInterfaceOrientations
{
return [self.selectedViewController supportedInterfaceOrientations];
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return [self.selectedViewController preferredInterfaceOrientationForPresentation];
}
繼承UINavigationController,override和UITabBarController中相同的方法,將selectedViewController改為topViewController
- (BOOL)shouldAutorotate
{
return [self.topViewController shouldAutorotate];
}
- (NSUInteger)supportedInterfaceOrientations
{
return [self.topViewController supportedInterfaceOrientations];
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return [self.topViewController preferredInterfaceOrientationForPresentation];
}
在真正實現(xiàn)界面的ViewController里,override上面這三個方法,override規(guī)則如下:
preferredInterfaceOrientationForPresentation表示viewController初始顯示時的方向;
supportedInterfaceOrientations是在該viewController中支持的所有方向;
shouldAutorotate表示是否允許旋屏。
流程說明
首先,對于任意一個viewController,iOS會以info.plist中的設置和當前viewController的preferredInterfaceOrientationForPresentation和supportedInterfaceOrientations三者支持的方法做一個交運算,若交集不為空,則以preferredInterfaceOrientationForPresentation為初始方向,交集中的所有方向均支持,但僅在shouldAutorotate返回YES時,允許從初始方向旋轉(zhuǎn)至其他方向。若交集為空,進入viewController時即crash,錯誤信息中會提示交集為空。
其次,UINavigationController稍有些特別,難以用常規(guī)API做到同一個naviVC中的ViewController在不同方向間自如地切換。(如果去SO之類的地方搜索,會找到一個present empty viewController and then dismiss it之類的hacky trick,不太建議使用),如果要在橫豎屏間切換,建議使用presentXXX方法。
再次,AppDelegate中有一個委托方法可以動態(tài)的設置應用支持的旋轉(zhuǎn)方向,且此委托的返回值會覆蓋info.plist中的固定設置。使用該方法的便利之處不言自明,但缺點是搞明白當前哪個ViewController即將要被顯示,很可能會導致耦合增加;
最后,以上均為個人在iOS8 SDK下得到的實踐結(jié)果,請題主結(jié)合工程實際參考使用。