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UIScreen学习记录

 
阅读更多

 

UIScreen学习记录

转载自 http://blog.csdn.net/fww330666557/article/details/11918539

A UIScreen object contains the bounding rectangle of the device’s entire screen. When setting up your application’s user interface, you should use the properties of this object to get the recommended frame rectangles for your application’s window.

UIScreen对象包含了整个屏幕的边界矩形。当构造应用的用户界面接口时，你应该使用该对象的属性来获得推荐的矩形大小，用以构造你的程序窗口。

以下列出的属性和操作是我用过的。

 
+ mainScreen        Returns the screen object representing the device’s screen.

bounds  property    Contains the bounding rectangle of the screen, measured in points. (read-only)
applicationFrame  property  The frame rectangle for the app window. (read-only)
scale  property   The natural scale factor associated with the screen. (read-only) 
CGRect bound = [[UIScreen mainScreen] bounds];  // 返回的是带有状态栏的Rect
CGRect frame = [[UIScreen mainScreen] applicationFrame];  // 返回的是不带有状态栏的Rect
float scale = [[UIScreen mainScreen] scale]; // 得到设备的自然分辨率
 备注：状态栏高度为20
 

 
根据不同设备获取到的参数数据：
 1. iphone 6s plus
//设备类型
    NSString* deviceType = @"iphone 6s plus";
    //显示分辨率
    UIScreen* mainScreen = [UIScreen mainScreen];
    //bounds:只读属性，返回整个屏幕的rect (包含顶部的状态栏)
    NSLog(@"[%@] mainScreen.bounds:%@",deviceType,NSStringFromCGRect(mainScreen.bounds));
    //applicationFrame:只读属性，返回状态栏之下的屏幕的rect （不包含顶部的状态栏）
    NSLog(@"[%@] mainScreen.applicationFrame:%@",deviceType,NSStringFromCGRect(mainScreen.applicationFrame));
    //设备的分辨率：只读属性
    NSLog(@"[%@] mainScreen.scale:%f",deviceType,mainScreen.scale);
    //屏幕亮度：取值范围为0-1.0
    NSLog(@"[%@] mainScreen.brightness:%f",deviceType,mainScreen.brightness);
 输出结果：
[iphone 6s plus] mainScreen.bounds:{{0, 0}, {414, 736}}
 [iphone 6s plus] mainScreen.applicationFrame:{{0, 20}, {414, 716}}
 [iphone 6s plus] mainScreen.scale:3.000000
 [iphone 6s plus] mainScreen.brightness:0.500000
 
 2. iphone 6s 
//设备类型
    NSString* deviceType = @"iphone 6s";
    //显示分辨率
    UIScreen* mainScreen = [UIScreen mainScreen];
    //bounds:只读属性，返回整个屏幕的rect (包含顶部的状态栏)
    NSLog(@"[%@] mainScreen.bounds:%@",deviceType,NSStringFromCGRect(mainScreen.bounds));
    //applicationFrame:只读属性，返回状态栏之下的屏幕的rect （不包含顶部的状态栏）
    NSLog(@"[%@] mainScreen.applicationFrame:%@",deviceType,NSStringFromCGRect(mainScreen.applicationFrame));
    //设备的分辨率：只读属性
    NSLog(@"[%@] mainScreen.scale:%f",deviceType,mainScreen.scale);
    //屏幕亮度：取值范围为0-1.0
    NSLog(@"[%@] mainScreen.brightness:%f",deviceType,mainScreen.brightness);
  输出结果：
 [iphone 6s] mainScreen.bounds:{{0, 0}, {375, 667}}
 [iphone 6s] mainScreen.applicationFrame:{{0, 20}, {375, 647}}
 [iphone 6s] mainScreen.scale:2.000000
 [iphone 6s] mainScreen.brightness:0.500000
 
 3. iphone 6 plus
    //设备类型
    NSString* deviceType = @"iphone 6 plus";
    //显示分辨率
    UIScreen* mainScreen = [UIScreen mainScreen];
    //bounds:只读属性，返回整个屏幕的rect (包含顶部的状态栏)
    NSLog(@"[%@] mainScreen.bounds:%@",deviceType,NSStringFromCGRect(mainScreen.bounds));
    //applicationFrame:只读属性，返回状态栏之下的屏幕的rect （不包含顶部的状态栏）
    NSLog(@"[%@] mainScreen.applicationFrame:%@",deviceType,NSStringFromCGRect(mainScreen.applicationFrame));
    //设备的分辨率：只读属性
    NSLog(@"[%@] mainScreen.scale:%f",deviceType,mainScreen.scale);
    //屏幕亮度：取值范围为0-1.0
    NSLog(@"[%@] mainScreen.brightness:%f",deviceType,mainScreen.brightness);
   输出结果：
 [iphone 6 plus] mainScreen.bounds:{{0, 0}, {414, 736}}
 [iphone 6 plus] mainScreen.applicationFrame:{{0, 20}, {414, 716}}
 [iphone 6 plus] mainScreen.scale:3.000000
 [iphone 6 plus] mainScreen.brightness:0.500000
  4. iphone 6
 
    //设备类型
    NSString* deviceType = @"iphone 6";
    //显示分辨率
    UIScreen* mainScreen = [UIScreen mainScreen];
    //bounds:只读属性，返回整个屏幕的rect (包含顶部的状态栏)
    NSLog(@"[%@] mainScreen.bounds:%@",deviceType,NSStringFromCGRect(mainScreen.bounds));
    //applicationFrame:只读属性，返回状态栏之下的屏幕的rect （不包含顶部的状态栏）
    NSLog(@"[%@] mainScreen.applicationFrame:%@",deviceType,NSStringFromCGRect(mainScreen.applicationFrame));
    //设备的分辨率：只读属性
    NSLog(@"[%@] mainScreen.scale:%f",deviceType,mainScreen.scale);
    //屏幕亮度：取值范围为0-1.0
    NSLog(@"[%@] mainScreen.brightness:%f",deviceType,mainScreen.brightness);
 输出：
 [iphone 6] mainScreen.bounds:{{0, 0}, {375, 667}}
 [iphone 6] mainScreen.applicationFrame:{{0, 20}, {375, 647}}
 [iphone 6] mainScreen.scale:2.000000
 [iphone 6] mainScreen.brightness:0.500000
 
  5. iphone 5s
 
    //设备类型
    NSString* deviceType = @"iphone 5s";
    //显示分辨率
    UIScreen* mainScreen = [UIScreen mainScreen];
    //bounds:只读属性，返回整个屏幕的rect (包含顶部的状态栏)
    NSLog(@"[%@] mainScreen.bounds:%@",deviceType,NSStringFromCGRect(mainScreen.bounds));
    //applicationFrame:只读属性，返回状态栏之下的屏幕的rect （不包含顶部的状态栏）
    NSLog(@"[%@] mainScreen.applicationFrame:%@",deviceType,NSStringFromCGRect(mainScreen.applicationFrame));
    //设备的分辨率：只读属性
    NSLog(@"[%@] mainScreen.scale:%f",deviceType,mainScreen.scale);
    //屏幕亮度：取值范围为0-1.0
    NSLog(@"[%@] mainScreen.brightness:%f",deviceType,mainScreen.brightness);
   输出：
 [iphone 5s] mainScreen.bounds:{{0, 0}, {320, 568}}
 [iphone 5s] mainScreen.applicationFrame:{{0, 20}, {320, 548}}
 [iphone 5s] mainScreen.scale:2.000000
 [iphone 5s] mainScreen.brightness:0.500000
   6. iphone 5 
    //设备类型
    NSString* deviceType = @"iphone 5";
    //显示分辨率
    UIScreen* mainScreen = [UIScreen mainScreen];
    //bounds:只读属性，返回整个屏幕的rect (包含顶部的状态栏)
    NSLog(@"[%@] mainScreen.bounds:%@",deviceType,NSStringFromCGRect(mainScreen.bounds));
    //applicationFrame:只读属性，返回状态栏之下的屏幕的rect （不包含顶部的状态栏）
    NSLog(@"[%@] mainScreen.applicationFrame:%@",deviceType,NSStringFromCGRect(mainScreen.applicationFrame));
    //设备的分辨率：只读属性
    NSLog(@"[%@] mainScreen.scale:%f",deviceType,mainScreen.scale);
    //屏幕亮度：取值范围为0-1.0
    NSLog(@"[%@] mainScreen.brightness:%f",deviceType,mainScreen.brightness);
 输出：
 [iphone 5] mainScreen.bounds:{{0, 0}, {320, 568}}
 [iphone 5] mainScreen.applicationFrame:{{0, 20}, {320, 548}}
 [iphone 5] mainScreen.scale:2.000000
 [iphone 5] mainScreen.brightness:0.500000
    7. iphone 4s
 
    //设备类型
    NSString* deviceType = @"iphone 4s";
    //显示分辨率
    UIScreen* mainScreen = [UIScreen mainScreen];
    //bounds:只读属性，返回整个屏幕的rect (包含顶部的状态栏)
    NSLog(@"[%@] mainScreen.bounds:%@",deviceType,NSStringFromCGRect(mainScreen.bounds));
    //applicationFrame:只读属性，返回状态栏之下的屏幕的rect （不包含顶部的状态栏）
    NSLog(@"[%@] mainScreen.applicationFrame:%@",deviceType,NSStringFromCGRect(mainScreen.applicationFrame));
    //设备的分辨率：只读属性
    NSLog(@"[%@] mainScreen.scale:%f",deviceType,mainScreen.scale);
    //屏幕亮度：取值范围为0-1.0
    NSLog(@"[%@] mainScreen.brightness:%f",deviceType,mainScreen.brightness);
 输出：
 [iphone 4s] mainScreen.bounds:{{0, 0}, {320, 480}}
 [iphone 4s] mainScreen.applicationFrame:{{0, 20}, {320, 460}}
 [iphone 4s] mainScreen.scale:2.000000
 [iphone 4s] mainScreen.brightness:0.500000
 
 
 
 
 
 

 

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