如何比较版本格式的两个字符串?这样:
version_compare("2.5.1", "2.5.2") => -1 (smaller)
version_compare("2.5.2", "2.5.2") => 0 (equal)
version_compare("2.5.5", "2.5.2") => 1 (bigger)
version_compare("2.5.11", "2.5.2") => 1 (bigger, eleven is bigger than two)
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如上图所示...... lineHeight是橙色框的高度.如何获得蓝色框的高度(即lineHeight+行间距高度)?谢谢!
更新:我发现lineHeight行为的不同取决于内容中的字符.如果内容全部是英文,则lineHeight是正确的(例如,在默认的UITextView中为21).但是,当内容与汉字混合时,UIFont lineHeight仍然报告为21,而self.textView.contentSize.height增加的则不同:
English - adding 21 points for each line
Chinese - adding 24 points for each line
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更新(sizeWithFont:)
CGSize constrainedRect = CGSizeMake(1000, 1000);
CGSize rectEnglish = [@"hello\nworld" sizeWithFont:self.textView.font constrainedToSize:constrainedRect lineBreakMode:UILineBreakModeWordWrap];
NSLog(@"width: %.2f height: %.2f", rectEnglish.width, rectEnglish.height);
CGSize rectChinese = [@"?\n??" sizeWithFont:self.textView.font constrainedToSize:constrainedRect lineBreakMode:UILineBreakModeWordWrap];
NSLog(@"width: %.2f height: %.2f", rectChinese.width, rectChinese.height);
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输出:
width: 41.00 height: 42.00
width: 34.00 height: 42.00
Run Code Online (Sandbox Code Playgroud) 我正在构建相册应用程序并找到一些图像缓存库,即:
您推荐的是什么(或列表中没有的其他库)?我在寻找:
谢谢
添加几个本地化后:

并本地化(AppName)-info.plist文件:

并检查了Bundle Resources(也尝试从Copy Resources Bundle列表中删除Go-info.plist :

和文件属性:

Xcode(4.6.3)给出错误:
错误:无法从'.../Go/Go/Go-Info.plist'读取数据:无法打开文件"Go-Info.plist",因为没有这样的文件.
看起来Xcode忽略了路径中的本地化文件夹.它试图找到info.plist:
.../Go/Go/Go-Info.plist
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代替:
.../Go/Go/(Localization)/Go-Info.plist
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我该如何解决?
在将PHP从5.1升级到5.2.10之后,我在以下情况下收到以下警告php -v:
# php -v
PHP Warning: PHP Startup: fileinfo: Unable to initialize module
Module compiled with module API=20050922, debug=0, thread-safety=0
PHP compiled with module API=20060613, debug=0, thread-safety=0
These options need to match
in Unknown on line 0
PHP Warning: PHP Startup: mcrypt: Unable to initialize module
Module compiled with module API=20050922, debug=0, thread-safety=0
PHP compiled with module API=20060613, debug=0, thread-safety=0
These options need to match
in Unknown on line 0
PHP Warning: PHP Startup: memcache: Unable to …Run Code Online (Sandbox Code Playgroud) 后:
brew install mysql
mysql_install_db
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我尝试stopMySQL服务器:
$ mysql.server stop
Shutting down MySQL
.. ERROR! Manager of pid-file quit without updating file.
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我该如何解决上述错误?谢谢!
信息:
$ mysql -v
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.1.51 Source distribution
Run Code Online (Sandbox Code Playgroud) 有没有办法告诉是否有一个模态UIViewController已经提出,比如说,在调用之前dismissModalViewControllerAnimated?
我想find和convert一个CSV文件十进制,例如,所有的科学记数法字符串:
1.0e-05 to 0.00001
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我怎么能在红宝石中做到这一点?
我想更新updated_at一些记录:
users = User.in_mailing_list
users.update_all(:updated_at => Time.now)
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是否有一个快捷方式,比如users.touch_all方法?
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