Question

我使用的代码显示某个xib文件，具体取决于设备，目前为3 xibs，一个用于iPhone4，一个用于iPhone5，一个用于iPad。

自从iOS8 / iPhone 6以来，由于xib不知道要加载什么，该应用程序无法处理高于5s的任何内容;

- (IBAction)btnTapForStart:(id)sender {

    fromOtherClass=YES;

    if([[UIScreen mainScreen]bounds].size.height == 568)
    {
        PlayMusicViewController *pmvc = [[PlayMusicViewController alloc]initWithNibName:@"XibForIPhone5" bundle:[NSBundle mainBundle]];

        [self.navigationController pushViewController:pmvc animated:YES];

    }
    else
    {
        PlayMusicViewController *pmvc = [[PlayMusicViewController alloc]init];

        [self.navigationController pushViewController:pmvc animated:YES];
    }

    [appObject.audioPlayer stop];
}

如果我将568的值更改为更高它会起作用，但有没有办法将它组合起来，例如，高度是568或iPhone6尺寸还是iPhone 6加上尺寸等？

Answer 1

您可能应该使用像Maddy所说的自动布局，但是如果您想拥有适用于特定设备的代码，那么您可能希望实现此实用程序方法。然后，您可以根据需要创建任意数量的xib，并将它们定位到特定设备。 e.g。

if ([[Utilities deviceType] isEqualToString:@"iPhone Retina4"] || [[Utilities deviceType] isEqualToString:@"iPhone Retina35"] ) {
   -- do something specific for these phones
}

我将此方法放在Utilities类中。

+ (NSString *)deviceType {
    NSString *device = nil;
    CGSize screenSize = [[UIScreen mainScreen] bounds].size;
    CGFloat deviceScale = [UIScreen mainScreen].scale;

    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
        device = @"iPhone Classic"; // Just in case it doesn't make it through the conditionals
        // Classic has a resolution of 480 × 320
        if( (screenSize.height == 480 || screenSize.width == 480) && deviceScale == 1.0f ) {
            device = @"iPhone Classic";
        // Retina has a resolution of 960 × 640
        } else if( (screenSize.height == 480 || screenSize.width == 480) && deviceScale == 2.0f ) {
            device = @"iPhone Retina35";
        // Retina 4" has a resolution of 1136 x 640
        } else if (screenSize.height == 568 || screenSize.width == 568 ) {
            device = @"iPhone Retina4";
        // iPhone 6 has a resolution of 1334 by 750
        } else if (screenSize.height == 667 || screenSize.width == 667 ) {
            device = @"iPhone 6";
        // iPhone 6 Plus has an actual size of 2208 × 1242 and resolution of 1920 by 1080
        // Reported size is 736 x 414
        } else if (screenSize.height == 736 || screenSize.width == 736 ) {
            device = @"iPhone 6 Plus";
        }

    } else if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
        device = @"iPad Classic"; // Just in case it doesn't make it through the conditionals
        if(deviceScale == 1.0f) {
            device = @"iPad Classic";
        } else if (deviceScale == 2.0f) {
            device = @"iPad Retina";
        }
    }
    //NSLog(@"The device is %@ scale is %f and the height is %f and width is %f", device, deviceScale, screenSize.height, screenSize.width);

    return device;
}

Answer 2

我对枚举做了一些研究，他们很好。它们使代码更具可读性，但大多数情况下它们允许编译器帮助您键入和捕获错误。 Xcode会为您自动填充您的deviceType，如果您尝试使用未定义的值，则会给您错误：使用未声明的标识符。这是重写为枚举的代码。我用LF作为前缀，但你应该使用适合你项目的任何东西。

这是我的头文件

// Devices as of Fall 2014
typedef NS_ENUM(NSInteger, LFdeviceType) {
    LFDeviceTypePhoneClassic,
    LFDeviceTypePhoneRetina3_5,
    LFDeviceTypePhoneRetina4,
    LFDeviceTypePhone6,
    LFDeviceTypePhone6Plus,
    LFDeviceTypePadClassic,
    LFDeviceTypePadRetina,
};

这是在我的.m文件中。

m+ (NSInteger)deviceType {
    CGSize screenSize = [[UIScreen mainScreen] bounds].size;
    CGFloat deviceScale = [UIScreen mainScreen].scale;
    LFdeviceType device = LFDeviceTypePhoneClassic;

    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
        device = LFDeviceTypePhoneClassic; // Just in case it doesn't make it through the conditionals
        // Classic has a resolution of 480 × 320
        if( (screenSize.height == 480 || screenSize.width == 480) && deviceScale == 1.0f ) {
            device = LFDeviceTypePhoneClassic;
        // Retina has a resolution of 960 × 640
        } else if( (screenSize.height == 480 || screenSize.width == 480) && deviceScale == 2.0f ) {
            device = LFDeviceTypePhoneRetina3_5;
        // Retina 4" has a resolution of 1136 x 640
        } else if (screenSize.height == 568 || screenSize.width == 568 ) {
            device = LFDeviceTypePhoneRetina4;
        // iPhone 6 has a resolution of 1334 by 750
        } else if (screenSize.height == 667 || screenSize.width == 667 ) {
            device = LFDeviceTypePhone6;
        // iPhone 6 Plus has an actual size of 2208 × 1242 and resolution of 1920 by 1080
        // Reported size is 736 x 414
        } else if (screenSize.height == 736 || screenSize.width == 736 ) {
            device = LFDeviceTypePhone6Plus;
        }

    } else if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
        device = LFDeviceTypePadClassic; // Just in case it doesn't make it through the conditionals
        if(deviceScale == 1.0f) {
            device = LFDeviceTypePadClassic;
        } else if (deviceScale == 2.0f) {
            device = LFDeviceTypePadRetina;
        }
    }
    //NSLog(@"The device is %@ scale is %f and the height is %f and width is %f", device, deviceScale, screenSize.height, screenSize.width);

    return device;
}

这样称呼：

if ( (   [Utilities deviceType] == LFDeviceTypePhoneClassic 
      || [Utilities deviceType] == LFDeviceTypePhoneRetina3_5) &&
        numberOfFoilsOnScreen > 7 ) {
        numberOfFoilsOnScreen = 7;
}

定义大于iPhone 6的屏幕尺寸？

2 个答案: