三十八:各個版本IPHONE分辨率及圖檔的實作原理
desert@2x : iPhone 4s (320 x 420)
desert-568h@2x : iPhones 5, 5C and 5S (320 x 568)
desert-667h@2x : iPhone 6 (375 x 667)
desert-736h@3x : iPhone 6+ (414 x 736)
desert@2x~ipad : iPad (1024 x 768)
iPhone 4S Screen Size: 3.5 Inches Resolution: 640 x 960 (Half: 320 x 480)
iPhone 5 Screen Size: 4.0 Inches Resolution: 640 × 1136 (Half: 320 x 568)
iPhone 5S/5C Screen Size: 4.0 Inches Resolution: 640 x 1136 (Half: 320 x 568)
iPhone 6 Screen Size: 4.7 Inches Resolution: 750 x 1334 (Half: 375 x 667)
iPhone 6 Plus Screen Size: 5.5 Inches Resolution: 1242 x 2208 (1/3: 414 x 736) The size of iPhone 6 Plus is @3x scaling. So, it is divided by 3.
界面大小比例:
圖檔大小實作的原理:
#import <UIKit/UIKit.h>
typedef NS_ENUM(NSInteger, thisDeviceClass) {
thisDeviceClass_iPhone,
thisDeviceClass_iPhoneRetina,
thisDeviceClass_iPhone5,
thisDeviceClass_iPhone6,
thisDeviceClass_iPhone6plus,
// we can add new devices when we become aware of them
thisDeviceClass_iPad,
thisDeviceClass_iPadRetina,
thisDeviceClass_unknown
};
thisDeviceClass currentDeviceClass();
@interface UIImage (DeviceSpecificMedia)
+ (instancetype )imageForDeviceWithName:(NSString *)fileName;
@end
#import "UIImage+DeviceSpecificMedia.h"
thisDeviceClass currentDeviceClass() {
CGFloat greaterPixelDimension = (CGFloat) fmaxf(((float)[[UIScreen mainScreen]bounds].size.height),
((float)[[UIScreen mainScreen]bounds].size.width));
switch ((NSInteger)greaterPixelDimension) {
case 480:
return (( [[UIScreen mainScreen]scale] > 1.0) ? thisDeviceClass_iPhoneRetina : thisDeviceClass_iPhone );
break;
case 568:
return thisDeviceClass_iPhone5;
break;
case 667:
return thisDeviceClass_iPhone6;
break;
case 736:
return thisDeviceClass_iPhone6plus;
break;
case 1024:
return (( [[UIScreen mainScreen]scale] > 1.0) ? thisDeviceClass_iPadRetina : thisDeviceClass_iPad );
break;
default:
return thisDeviceClass_unknown;
break;
}
}
@implementation UIImage (deviceSpecificMedia)
+ (NSString *)magicSuffixForDevice
{
switch (currentDeviceClass()) {
case thisDeviceClass_iPhone:
return @"";
break;
case thisDeviceClass_iPhoneRetina:
return @"@2x";
break;
case thisDeviceClass_iPhone5:
return @"-568h@2x";
break;
case thisDeviceClass_iPhone6:
return @"-667h@2x"; //or some other arbitrary string..
break;
case thisDeviceClass_iPhone6plus:
return @"-736h@3x";
break;
case thisDeviceClass_iPad:
return @"~ipad";
break;
case thisDeviceClass_iPadRetina:
return @"~ipad@2x";
break;
case thisDeviceClass_unknown:
default:
return @"";
break;
}
}
+ (instancetype )imageForDeviceWithName:(NSString *)fileName
{
UIImage *result = nil;
NSString *nameWithSuffix = [fileName stringByAppendingString:[UIImage magicSuffixForDevice]];
result = [UIImage imageNamed:nameWithSuffix];
if (!result) {
result = [UIImage imageNamed:fileName];
}
return result;
}
@end
三十九:其它幾張知識圖檔
1:NSObject繼承類圖
2:sqlite3傳回含義
3:視圖坐标說明
4:生命周期圖
5:UI繼承圖
6:Segue清單跳轉,關于selection跟Accessory的差別
7:IOS6與IOS7界頁的差别
四十:為什麼XCode項目中會有A M這種辨別
如果沒裝過svn,預設是本機 git管理。 M是表示改檔案有改動,A是新增加的檔案。目前是都沒有送出到伺服器狀态,到source control 裡點選commit 送出後就沒這些了,下次再有改動或新增,還會出現該标記。
四十一:MAC 本地進行IP映射域名的操作
1.打開finder, 快捷鍵:shift+command+g 前往檔案夾 “/etc”
2.找到hosts檔案托到桌面修改,再把/etc下源檔案删除,把桌面修改好的拖進/etc。
最後在終端:ping svnserver ,如果能ping通到192.168.1.51,說明映射成功
四十二:arm64 armv7 armv7s arm6
目前ios的指令集有以下幾種:
• armv6 ◦
iPhone
◦ iPhone2
◦ iPhone3G
◦ 第一代和第二代iPod Touch
• armv7
◦ iPhone4
◦ iPhone4S
• armv7s
◦ iPhone5
◦ iPhone5C
• arm64
◦ iPhone5S
機器對指令集的支援是向下相容的,是以armv7的指令集是可以運作在iphone5S的,隻是效率沒那麼高而已~
================================================
Architecture : 指你想支援的指令集。
Valid architectures : 指即将編譯的指令集。
Build Active Architecture Only : 隻是否隻編譯目前适用的指令集。
================================================
現在是2014年初,其實4和4S的使用者還是蠻多的,而iphone3之類的機器幾乎沒有了,是以我們的指令集最低必須基于armv7.
是以,Architecture的值選擇:armv7 armv7s arm64
PS:選arm64時需要最低支援5.1.1:
四十三:真機測試報 TCWeiboSDK 93 duplicate symbols for architecture armv7
這是因為在項目中引用的兩個相同的類庫引起了,在我的項目中是因為引入的兩個不同指令集引起的;
四十四:UINavigationBar的一些屬性的行為發生了變化
self.navigationController.navigationBar.barTintColor = [UIColor blackColor];
self.navigationController.navigationBar.tintColor = [UIColor whiteColor];
[self.navigationController.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor whiteColor]}];
self.navigationController.navigationBar.translucent = NO;