获取iOS设备的型号（iPhone4，iphone5，iPhone5s......）

　　做自定义键盘，首先要适配所有的设备，所以在这里就要知道用户使用的是哪一款手机，下面总结了几种获取设备型号的方法；

　　PS：这些也是我在网上自己找的，以防不时之需。

　　方法一：

 1 //***宏定义
 2 /*[UIScreen instancesRespondToSelector:@selector(currentMode)];
 3 判断UIScreen 类中是否包含currentMode这个方法，
 4 若存在则调用CGSizeEqualToSize比较2个size大小是否相同，
 5 若相同返回yes，否则返回no。
 6 */
 7 #define iPhone5 ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 1136), [[UIScreen mainScreen] currentMode].size) : NO)
 8 然后：
 9 if（iPhone5）{
10 //***具体操作
11 }else{
12
13 //***具体操作
14
15 }

　　方法二：

1 #define Screen_height   [[UIScreen mainScreen] bounds].size.height
2 #define Screen_width    [[UIScreen mainScreen] bounds].size.width 

　　方法三：

　　PS：注意，需要#import "sys/utsname.h"

 1  + (NSString*)deviceString
 2 {
 3     // 需要#import "sys/utsname.h"
 4     struct utsname systemInfo;
 5     uname(&systemInfo);
 6     NSString *deviceString = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
 7
 8     if ([deviceString isEqualToString:@"iPhone1,1"])    return @"iPhone 1G";
 9     if ([deviceString isEqualToString:@"iPhone1,2"])    return @"iPhone 3G";
10     if ([deviceString isEqualToString:@"iPhone2,1"])    return @"iPhone 3GS";
11     if ([deviceString isEqualToString:@"iPhone3,1"])    return @"iPhone 4";
12     if ([deviceString isEqualToString:@"iPhone4,1"])    return @"iPhone 4S";
13     if ([deviceString isEqualToString:@"iPhone5,2"])    return @"iPhone 5";
14     if ([deviceString isEqualToString:@"iPhone3,2"])    return @"Verizon iPhone 4";
15     if ([deviceString isEqualToString:@"iPod1,1"])      return @"iPod Touch 1G";
16     if ([deviceString isEqualToString:@"iPod2,1"])      return @"iPod Touch 2G";
17     if ([deviceString isEqualToString:@"iPod3,1"])      return @"iPod Touch 3G";
18     if ([deviceString isEqualToString:@"iPod4,1"])      return @"iPod Touch 4G";
19     if ([deviceString isEqualToString:@"iPad1,1"])      return @"iPad";
20     if ([deviceString isEqualToString:@"iPad2,1"])      return @"iPad 2 (WiFi)";
21     if ([deviceString isEqualToString:@"iPad2,2"])      return @"iPad 2 (GSM)";
22     if ([deviceString isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";
23     if ([deviceString isEqualToString:@"i386"])         return @"Simulator";
24     if ([deviceString isEqualToString:@"x86_64"])       return @"Simulator";
25     NSLog(@"NOTE: Unknown device type: %@", deviceString);
26     return deviceString;
27 }  

 1  + (NSString*)deviceString
 2  2 {
 3  3     // 需要#import "sys/utsname.h"
 4  4     struct utsname systemInfo;
 5  5     uname(&systemInfo);
 6  6     NSString *deviceString = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
 7  7
 8  8     if ([deviceString isEqualToString:@"iPhone1,1"])    return @"iPhone 1G";
 9  9     if ([deviceString isEqualToString:@"iPhone1,2"])    return @"iPhone 3G";
10 10     if ([deviceString isEqualToString:@"iPhone2,1"])    return @"iPhone 3GS";
11 11     if ([deviceString isEqualToString:@"iPhone3,1"])    return @"iPhone 4";
12 12     if ([deviceString isEqualToString:@"iPhone4,1"])    return @"iPhone 4S";
13 13     if ([deviceString isEqualToString:@"iPhone5,2"])    return @"iPhone 5";
14 14     if ([deviceString isEqualToString:@"iPhone3,2"])    return @"Verizon iPhone 4";
15 15     if ([deviceString isEqualToString:@"iPod1,1"])      return @"iPod Touch 1G";
16 16     if ([deviceString isEqualToString:@"iPod2,1"])      return @"iPod Touch 2G";
17 17     if ([deviceString isEqualToString:@"iPod3,1"])      return @"iPod Touch 3G";
18 18     if ([deviceString isEqualToString:@"iPod4,1"])      return @"iPod Touch 4G";
19 19     if ([deviceString isEqualToString:@"iPad1,1"])      return @"iPad";
20 20     if ([deviceString isEqualToString:@"iPad2,1"])      return @"iPad 2 (WiFi)";
21 21     if ([deviceString isEqualToString:@"iPad2,2"])      return @"iPad 2 (GSM)";
22 22     if ([deviceString isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";
23 23     if ([deviceString isEqualToString:@"i386"])         return @"Simulator";
24 24     if ([deviceString isEqualToString:@"x86_64"])       return @"Simulator";
25 25     NSLog(@"NOTE: Unknown device type: %@", deviceString);
26 26     return deviceString;
27 27 }