我刚刚升级到Xcode 4.5 GM，发现你现在可以将“4英寸视网膜”大小应用到故事板中的视图控制器上。
现在，如果我想创建一个同时在iPhone 4和5上运行的应用程序，当然我必须构建每个窗口两次，但我还必须检测用户的iPhone屏幕是3.5英寸还是4英寸，然后应用视图。
我该怎么做呢?
当前回答
这里是正确的测试设备，不依赖于方向
- (BOOL)isIPhone5
{
CGSize size = [[UIScreen mainScreen] bounds].size;
if (MIN(size.width,size.height) == 320 && MAX(size.width,size.height == 568)) {
return YES;
}
return NO;
}
其他回答
这是我们的代码，在ios7/ios8上测试通过，适用于iphone4、iphone5、ipad、iphone6、iphone6p，无论在设备上还是模拟器上:
#define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) // iPhone and iPod touch style UI
#define IS_IPHONE_5_IOS7 (IS_IPHONE && [[UIScreen mainScreen] bounds].size.height == 568.0f)
#define IS_IPHONE_6_IOS7 (IS_IPHONE && [[UIScreen mainScreen] bounds].size.height == 667.0f)
#define IS_IPHONE_6P_IOS7 (IS_IPHONE && [[UIScreen mainScreen] bounds].size.height == 736.0f)
#define IS_IPHONE_4_AND_OLDER_IOS7 (IS_IPHONE && [[UIScreen mainScreen] bounds].size.height < 568.0f)
#define IS_IPHONE_5_IOS8 (IS_IPHONE && ([[UIScreen mainScreen] nativeBounds].size.height/[[UIScreen mainScreen] nativeScale]) == 568.0f)
#define IS_IPHONE_6_IOS8 (IS_IPHONE && ([[UIScreen mainScreen] nativeBounds].size.height/[[UIScreen mainScreen] nativeScale]) == 667.0f)
#define IS_IPHONE_6P_IOS8 (IS_IPHONE && ([[UIScreen mainScreen] nativeBounds].size.height/[[UIScreen mainScreen] nativeScale]) == 736.0f)
#define IS_IPHONE_4_AND_OLDER_IOS8 (IS_IPHONE && ([[UIScreen mainScreen] nativeBounds].size.height/[[UIScreen mainScreen] nativeScale]) < 568.0f)
#define IS_IPHONE_5 ( ( [ [ UIScreen mainScreen ] respondsToSelector: @selector( nativeBounds ) ] ) ? IS_IPHONE_5_IOS8 : IS_IPHONE_5_IOS7 )
#define IS_IPHONE_6 ( ( [ [ UIScreen mainScreen ] respondsToSelector: @selector( nativeBounds ) ] ) ? IS_IPHONE_6_IOS8 : IS_IPHONE_6_IOS7 )
#define IS_IPHONE_6P ( ( [ [ UIScreen mainScreen ] respondsToSelector: @selector( nativeBounds ) ] ) ? IS_IPHONE_6P_IOS8 : IS_IPHONE_6P_IOS7 )
#define IS_IPHONE_4_AND_OLDER ( ( [ [ UIScreen mainScreen ] respondsToSelector: @selector( nativeBounds ) ] ) ? IS_IPHONE_4_AND_OLDER_IOS8 : IS_IPHONE_4_AND_OLDER_IOS7 )
针对SDK和OS的任何组合进行测试和设计:
斯威夫特
增加了iPad类型。iPad 2和iPad mini是非视网膜iPad。而iPad Mini 2及以上，iPad 3,4, iPad Air, Air 2, Air 3和iPad Pro 9.7具有相同的1024逻辑分辨率。iPad Pro的maxLength为1366。参考
import UIKit
public enum DisplayType {
case unknown
case iphone4
case iphone5
case iphone6
case iphone6plus
case iPadNonRetina
case iPad
case iPadProBig
static let iphone7 = iphone6
static let iphone7plus = iphone6plus
}
public final class Display {
class var width:CGFloat { return UIScreen.main.bounds.size.width }
class var height:CGFloat { return UIScreen.main.bounds.size.height }
class var maxLength:CGFloat { return max(width, height) }
class var minLength:CGFloat { return min(width, height) }
class var zoomed:Bool { return UIScreen.main.nativeScale >= UIScreen.main.scale }
class var retina:Bool { return UIScreen.main.scale >= 2.0 }
class var phone:Bool { return UIDevice.current.userInterfaceIdiom == .phone }
class var pad:Bool { return UIDevice.current.userInterfaceIdiom == .pad }
class var carplay:Bool { return UIDevice.current.userInterfaceIdiom == .carPlay }
class var tv:Bool { return UIDevice.current.userInterfaceIdiom == .tv }
class var typeIsLike:DisplayType {
if phone && maxLength < 568 {
return .iphone4
}
else if phone && maxLength == 568 {
return .iphone5
}
else if phone && maxLength == 667 {
return .iphone6
}
else if phone && maxLength == 736 {
return .iphone6plus
}
else if pad && !retina {
return .iPadNonRetina
}
else if pad && retina && maxLength == 1024 {
return .iPad
}
else if pad && maxLength == 1366 {
return .iPadProBig
}
return .unknown
}
}
看看它的实际应用 https://gist.github.com/hfossli/bc93d924649de881ee2882457f14e346
注意:例如，如果iPhone 6处于放大模式，UI就是放大版的iPhone 5。这些功能不是决定设备类型，而是决定显示模式，因此iPhone 5是本例中的理想结果。
objective - c
#define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
#define IS_RETINA ([[UIScreen mainScreen] scale] >= 2.0)
#define SCREEN_WIDTH ([[UIScreen mainScreen] bounds].size.width)
#define SCREEN_HEIGHT ([[UIScreen mainScreen] bounds].size.height)
#define SCREEN_MAX_LENGTH (MAX(SCREEN_WIDTH, SCREEN_HEIGHT))
#define SCREEN_MIN_LENGTH (MIN(SCREEN_WIDTH, SCREEN_HEIGHT))
#define IS_ZOOMED (IS_IPHONE && SCREEN_MAX_LENGTH == 736.0)
#define IS_IPHONE_4_OR_LESS (IS_IPHONE && SCREEN_MAX_LENGTH < 568.0)
#define IS_IPHONE_5 (IS_IPHONE && SCREEN_MAX_LENGTH == 568.0)
#define IS_IPHONE_6 (IS_IPHONE && SCREEN_MAX_LENGTH == 667.0)
#define IS_IPHONE_6P (IS_IPHONE && SCREEN_MAX_LENGTH == 736.0)
用法:http://pastie.org/9687735
注意:例如，如果iPhone 6处于放大模式，UI就是放大版的iPhone 5。这些功能不是决定设备类型，而是决定显示模式，因此iPhone 5是本例中的理想结果。
这个问题已经得到了上百次的回答，但这个解决方案对我来说是最好的，并且在引入新设备时帮助解决了这个问题，而我没有定义一个大小。
Swift 5助手:
extension UIScreen {
func phoneSizeInInches() -> CGFloat {
switch (self.nativeBounds.size.height) {
case 960, 480:
return 3.5 //iPhone 4
case 1136:
return 4 //iPhone 5
case 1334:
return 4.7 //iPhone 6
case 2208:
return 5.5 //iPhone 6 Plus
case 2436:
return 5.8 //iPhone X
case 1792:
return 6.1 //iPhone XR
case 2688:
return 6.5 //iPhone XS Max
default:
let scale = self.scale
let ppi = scale * 163
let width = self.bounds.size.width * scale
let height = self.bounds.size.height * scale
let horizontal = width / ppi, vertical = height / ppi
let diagonal = sqrt(pow(horizontal, 2) + pow(vertical, 2))
return diagonal
}
}
}
这是因为记住手机的英寸大小很容易，比如“5.5英寸”或“4.7英寸”，但很难记住准确的像素大小。
if UIScreen.main.phoneSizeInInches() == 4 {
//do something with only 4 inch iPhones
}
这也给了你这样做的机会:
if UIScreen.main.phoneSizeInInches() < 5.5 {
//do something on all iPhones smaller than the plus
}
默认值:尝试使用屏幕大小和比例来尝试计算对角线英寸。这是为了防止出现一些新的设备大小，它将尽力确定和代码，如最后一个例子，应该仍然工作。
如果项目是用Xcode 6创建的，那么使用下面提到的代码来检测设备。
printf("\nDetected Resolution : %d x %d\n\n",(int)[[UIScreen mainScreen] nativeBounds].size.width,(int)[[UIScreen mainScreen] nativeBounds].size.height);
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone){
if ([[UIScreen mainScreen] respondsToSelector: @selector(scale)])
{
if([[UIScreen mainScreen] nativeBounds].size.height == 960 || [[UIScreen mainScreen] nativeBounds].size.height == 480){
printf("Device Type : iPhone 4,4s ");
}else if([[UIScreen mainScreen] nativeBounds].size.height == 1136){
printf("Device Type : iPhone 5,5S/iPod 5 ");
}else if([[UIScreen mainScreen] nativeBounds].size.height == 1334){
printf("Device Type : iPhone 6 ");
}else if([[UIScreen mainScreen] nativeBounds].size.height == 2208){
printf("Device Type : iPhone 6+ ");
}
}
}else{
printf("Device Type : iPad");
}
如果项目是在Xcode 5中创建并在Xcode 6中打开的，那么使用下面提到的代码来检测设备。(如果没有为iPhone 6,6+分配启动图像，此代码有效)
printf("\nDetected Resolution : %d x %d\n\n",(int)[[UIScreen mainScreen] nativeBounds].size.width,(int)[[UIScreen mainScreen] nativeBounds].size.height);
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone){
if ([[UIScreen mainScreen] respondsToSelector: @selector(scale)])
{
if([[UIScreen mainScreen] nativeBounds].size.height == 960 || [[UIScreen mainScreen] nativeBounds].size.height == 480){
printf("Device Type : iPhone 4,4s");
appType=1;
}else if([[UIScreen mainScreen] nativeBounds].size.height == 1136 || [[UIScreen mainScreen] nativeBounds].size.height == 1704){
printf("Device Type : iPhone 5,5S,6,6S/iPod 5 ");
appType=3;
}
}
}else{
printf("Device Type : iPad");
appType=2;
}
如果你仍然在使用Xcode 5，那么使用下面的代码来检测设备(iPhone 6和6+将不会被检测到)
printf("\nDetected Resolution : %d x %d\n\n",(int)[[UIScreen mainScreen] bounds].size.width,(int)[[UIScreen mainScreen] bounds].size.height);
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone){
if ([[UIScreen mainScreen] respondsToSelector: @selector(scale)])
{
CGSize result = [[UIScreen mainScreen] bounds].size;
CGFloat scale = [UIScreen mainScreen].scale;
result = CGSizeMake(result.width * scale, result.height * scale);
if(result.height == 960 || result.height == 480){
printf("Device Type : iPhone 4,4S ");
}else if(result.height == 1136){
printf("Device Type : iPhone 5s/iPod 5");
}
}
}else{
printf("Device Type : iPad");
}
CGFloat height = [UIScreen mainScreen].bounds.size.height;
NSLog(@"screen soze is %f",height);
if (height>550) {
// 4" screen-do some thing
}
else if (height<500) {
// 3.5 " screen- do some thing
}
推荐文章
- 如何删除默认的导航栏空间在SwiftUI导航视图
- 如何在iOS中使用Swift编程segue
- Swift -整数转换为小时/分钟/秒
- Swift:声明一个空字典
- 为什么ARC仍然需要@autoreleasepool ?
- 在成功提交我的应用程序后，“太多符号文件”
- 首先添加一个UIView，甚至是导航栏
- 我如何改变UIButton标题颜色?
- 在Swift中如何调用GCD主线程上的参数方法?
- NSLayoutConstraints是可动画的吗?
- iOS -构建失败，CocoaPods无法找到头文件
- Xcode 4挂在“附加到(应用程序名称)”
- CFNetwork SSLHandshake iOS 9失败
- 请求失败:不可接受的内容类型:文本/html使用AFNetworking 2.0
- 缺少推荐的图标文件-该包不包含iPhone / iPod Touch的应用程序图标，像素为“120x120”，png格式
