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如何从info.plist获取和使用uiInterfaceOrientation项?

info.plist uiinterfaceorientation ios

0

cmii · 技术社区 · 6 年前

我想在info.plist中获取支持的接口方向的项0。

为了得到这样的东西:

- (UIInterfaceOrientationMask)supportedInterfaceOrientations {

     NSArray *supportedOrientations = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"UISupportedInterfaceOrientations"];

     return supportedOrientations[0];

}

但我当然有一个不兼容类型错误: Incompatible pointer to integer conversion returning 'id' from a function with result type

如何解决这个问题?

1 回复 | 直到 6 年前

1

2

Adeel Miraj 6 年前

正如@mats在他的评论中提到的,信息字典包含支持方向的字符串值。您需要将字符串值转换为期望值 UIInterfaceOrientationMask 键入。可以使用字符串类别来执行此操作。

nsstring+ui设备定向.h

static NSString *kUIInterfaceOrientationPortrait           = @"UIInterfaceOrientationPortrait";
static NSString *kUIInterfaceOrientationLandscapeLeft      = @"UIInterfaceOrientationLandscapeLeft";
static NSString *kUIInterfaceOrientationLandscapeRight     = @"UIInterfaceOrientationLandscapeRight";
static NSString *kUIInterfaceOrientationPortraitUpsideDown = @"UIInterfaceOrientationPortraitUpsideDown";

@interface NSString (UIDeviceOrientation)

- (UIInterfaceOrientationMask)deviceOrientation;

@end

nsstring+ui设备定向.m

@implementation NSString (UIDeviceOrientation)

- (UIInterfaceOrientationMask)deviceOrientation {
    UIInterfaceOrientationMask mask = UIInterfaceOrientationMaskAll;

    if ([self isEqualToString:kUIInterfaceOrientationPortrait]) {
        mask = UIInterfaceOrientationMaskPortrait;
    }
    else if ([self isEqualToString:kUIInterfaceOrientationLandscapeLeft]) {
        mask = UIInterfaceOrientationMaskLandscapeLeft;
    }
    else if ([self isEqualToString:kUIInterfaceOrientationLandscapeRight]) {
        mask = UIInterfaceOrientationMaskLandscapeRight;
    }
    else if ([self isEqualToString:kUIInterfaceOrientationPortraitUpsideDown]) {
        mask = UIInterfaceOrientationMaskPortraitUpsideDown;
    }

    return mask;
}

SWIFT版本

extension String {
private var kUIInterfaceOrientationPortrait: String {
    return "UIInterfaceOrientationPortrait"
}

private var kUIInterfaceOrientationLandscapeLeft: String {
    return "UIInterfaceOrientationLandscapeLeft"
}

private var kUIInterfaceOrientationLandscapeRight: String {
    return "UIInterfaceOrientationLandscapeRight"
}

private var kUIInterfaceOrientationPortraitUpsideDown: String {
    return "UIInterfaceOrientationPortraitUpsideDown"
}

public var deviceOrientation: UIInterfaceOrientationMask {

    switch self {
    case kUIInterfaceOrientationPortrait:
        return .portrait

    case kUIInterfaceOrientationLandscapeLeft:
        return .landscapeLeft

    case kUIInterfaceOrientationLandscapeRight:
        return .landscapeRight

    case kUIInterfaceOrientationPortraitUpsideDown:
        return .portraitUpsideDown

    default:
        return .all
    }
}
}