NSDateFormatter拾掇 - 惯用的宏定义

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▪NSDateFormatter拾掇 NSDateFormatter整理NSDate对象包含两个部分，日期（Date）和时间（Time）。格式化的时间字符串主要也是针对日期和时间的 1、基础用法 NSDate* now = [NSDate date]; NSDateFormatter* fmt = [[NSDateFormatter alloc] i.........

▪ 惯用的宏定义常用的宏定义#pragma mark ===============常用的宏定义================ #define kScreenHeight [[UIScreen mainScreen] bounds].size.height #define kScreenWidth [[UIScreen mainScreen] bounds].size.width #define kStateBarHeight 20 #define kMai.........

▪ 障蔽系统鼠标按键屏蔽系统鼠标按键在一些系统开发中(例如机顶盒)有可能遇到需求不响应鼠标按键,在开发中怎么解决呢?下面我来给大家演示: 1.系统中按键的响应都是通过在ViewRootImpl中传递给View的,所以要想.........

[1]NSDateFormatter拾掇

来源: 互联网发布时间: 2014-02-18

NSDateFormatter整理
NSDate对象包含两个部分，日期（Date）和时间（Time）。格式化的时间字符串主要也是针对日期和时间的
1、基础用法
NSDate* now = [NSDate date];
NSDateFormatter* fmt = [[NSDateFormatter alloc] init];
fmt.dateStyle = kCFDateFormatterShortStyle;
fmt.timeStyle = kCFDateFormatterShortStyle;
fmt.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"];
NSString* dateString = [fmt stringFromDate:now];
NSLog(@"%@", dateString);
[fmt release];
打印输出：10/29/12, 2:27 PM
这使用的系统提供的格式化字符串，通过 fmt.dateStyle 和 fmt.timeStyle 进行的设置。实例中使用的参数是 kCFDateFormatterShortStyle，此外还有：
typedef CF_ENUM(CFIndex, CFDateFormatterStyle) {    // date and time format styles
    kCFDateFormatterNoStyle = 0,       // 无输出
    kCFDateFormatterShortStyle = 1,    // 10/29/12, 2:27 PM
    kCFDateFormatterMediumStyle = 2,   // Oct 29, 2012, 2:36:59 PM
    kCFDateFormatterLongStyle = 3,     // October 29, 2012, 2:38:46 PM GMT+08:00
    kCFDateFormatterFullStyle = 4      // Monday, October 29, 2012, 2:39:56 PM China Standard Time
};

自己写的date转换成nsstring:

2. 自定义区域语言
如上实例中，我们使用的是区域语言是 en_US，指的是美国英语。如果我们换成简体中文，则代码是：
fmt.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];
则对应的输出为：
typedef CF_ENUM(CFIndex, CFDateFormatterStyle) {    // date and time format styles
    kCFDateFormatterNoStyle = 0,       // 无输出
    kCFDateFormatterShortStyle = 1,    // 12-10-29 下午2:52
    kCFDateFormatterMediumStyle = 2,   // 2012-10-29 下午2:51:43
    kCFDateFormatterLongStyle = 3,     // 2012年10月29日 GMT+0800下午2时51分08秒
    kCFDateFormatterFullStyle = 4      // 2012年10月29日星期一中国标准时间下午2时46分49秒
};
世界通用的区域语言代码，详见 International Components for Unicode (ICU),  http://userguide.icu-project.org/formatparse/datetime
3. 自定义日期时间格式
NSDateFormatter提供了自定义日期时间的方法，主要是通过设置属性 dateFormat，常见的设置如下：
NSDate* now = [NSDate date];
NSDateFormatter* fmt = [[NSDateFormatter alloc] init];
fmt.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];
fmt.dateFormat = @"yyyy-MM-dd'T'HH:mm:ss";
NSString* dateString = [fmt stringFromDate:now];
NSLog(@"%@", dateString);
[fmt release];
打印输出：2012-10-29T16:08:40

除了上面列出的，还可以指定很多格式，详见http://userguide.icu-project.org/formatparse/datetime。
结合设置Locale，还可以打印出本地化的字符串信息。
NSDate* now = [NSDate date];
NSDateFormatter* fmt = [[NSDateFormatter alloc] init];
fmt.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];
fmt.dateFormat = @"yyyy-MM-dd a HH:mm:ss EEEE";
NSString* dateString = [fmt stringFromDate:now];
NSLog(@"\n%@", dateString);
[fmt release];
打印输出：2012-10-29 下午 16:25:27 星期一

4. 自定义月份星期等字符
NSDateFormatter中同样提供了相应的方式，去修改这些字符。一般情况下，使用相应区域语言下面的默认字符就OK了。但是你的确有这个需求，那么也是可以办到的。相应的方法非常多，如下：

Managing AM and PM Symbols

– AMSymbol
– setAMSymbol:
– PMSymbol
– setPMSymbol:
Managing Weekday Symbols

– weekdaySymbols
– setWeekdaySymbols:
– shortWeekdaySymbols
– setShortWeekdaySymbols:
– veryShortWeekdaySymbols
– setVeryShortWeekdaySymbols:
– standaloneWeekdaySymbols
– setStandaloneWeekdaySymbols:
– shortStandaloneWeekdaySymbols
– setShortStandaloneWeekdaySymbols:
– veryShortStandaloneWeekdaySymbols
– setVeryShortStandaloneWeekdaySymbols:
Managing Month Symbols

– monthSymbols
– setMonthSymbols:
– shortMonthSymbols
– setShortMonthSymbols:
– veryShortMonthSymbols
– setVeryShortMonthSymbols:
– standaloneMonthSymbols
– setStandaloneMonthSymbols:
– shortStandaloneMonthSymbols
– setShortStandaloneMonthSymbols:
– veryShortStandaloneMonthSymbols
– setVeryShortStandaloneMonthSymbols:
Managing Quarter Symbols

– quarterSymbols
– setQuarterSymbols:
– shortQuarterSymbols
– setShortQuarterSymbols:
– standaloneQuarterSymbols
– setStandaloneQuarterSymbols:
– shortStandaloneQuarterSymbols
– setShortStandaloneQuarterSymbols:
Managing Era Symbols

– eraSymbols
– setEraSymbols:
– longEraSymbols
– setLongEraSymbols:

date转换成nsstring方法：
- (NSString *)dateFromString:(NSString *)dateString
{
    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
    [dateFormat setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    NSDate *date = [dateFormat dateFromString:dateString];
    [dateFormat setDateFormat:@"yyyy-MM-dd"];
    NSString *srting = [dateFormat stringFromDate:date];
    [dateFormat release];
    return srting;
}
带样式的时间转换
- (NSString *)dateFromStringWithDateStyle:(NSDateFormatterStyle)dateStyle
{
    NSDate* now = [NSDate date];
    NSDateFormatter* fmt = [[NSDateFormatter alloc] init];
    fmt.dateStyle = dateStyle;
    fmt.timeStyle = dateStyle;
    fmt.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];
    NSString* dateString = [fmt stringFromDate:now];
    [fmt release];
    return dateString;

}

[2] 惯用的宏定义

来源: 互联网发布时间: 2014-02-18

常用的宏定义

#pragma mark ===============常用的宏定义================

#define kScreenHeight [[UIScreen mainScreen] bounds].size.height

#define kScreenWidth [[UIScreen mainScreen] bounds].size.width

#define kStateBarHeight 20

#define kMainHeight (ScreenHeight - StateBarHeight)

#define kMainWidth ScreenWidth

#define kIsIPhone5 ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 1136), [[UIScreen mainScreen] currentMode].size) : NO)

#define BACKGROUND_CORLOR [UIColor colorWithRed:222.0/255 green:222.0/255 blue:222.0/255 alpha:1]

#define kUserDefault [NSUserDefaults standardUserDefaults]

#define kApplication [UIApplication sharedApplication]

#define kDataEnv [DataEnvironment sharedDataEnvironment]

#define kDegreesToRadian(x) (M_PI * (x) / 180.0)

#define kRadianToDegrees(radian) (radian*180.0)/(M_PI)

#define kRgbColor(r,g,b) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:1]

#define kRgbColor2(r,g,b,a) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:(a)]

/* 根据名称加载有缓存图片 */

#define kImageNamed(name) [UIImage imageNamed:name]

//判断系统的当然版本。

#define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)

#pragma mark ===============不常用的宏定义================

#define kSystemError @"系统繁忙，请稍后再试！"

/* 获取系统目录 */

#define kGetDirectory(NSSearchPathDirectory) [NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory, NSUserDomainMask, YES)lastObject]

/* 获取NSFILEMANAGER对象 */

#define kFileManager [NSFileManager defaultManager]

/* 获取程序代理 */

#define kAppdelegate ((AppDelegate *)[[UIApplication sharedApplication] delegate])

/* 获取任意WINDOW对象 */

#define kWindow [[[UIApplication sharedApplication] windows] lastObject]

/* 获取KEYWINDOW对象 */

#define kKeyWindow [[UIApplication sharedApplication] keyWindow]

/* 获取USERDEFAULTS对象 */

#define kNotificactionCenter [NSNotificationCenter defaultCenter]

/* 获取当前控制器的navigationBar */

#define kNavigationBar [[self navigationController] navigationBar]

/* 简单提示框 */

#define kAlert(title, msg) [[[UIAlertView alloc] initWithTitle:title message:msg delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil]show]

/*------------------------------------加载图片---------------------------------------*/

/* 根据名称加载无缓存图片 */

#define kNoCacheImagewithName(name, ext) [UIImage imageWithContentsOfFile:[[NSBundle mainBundle]pathForResource:name ofType:ext]]

/* 根据路径加载无缓存图片 */

#define kNoCacheImagewithPath(path) [UIImage imageWithContentsOfFile:path]

/*------------------------------------视图------------------------------------------*/

/* 根据TAG获取视图 */

#define kViewWithTag(PARENTVIEW, TAG, CLASS) ((CLASS *)[PARENTVIEW viewWithTag:TAG])

/* 加载NIB文件 */

#define kLOADNIBWITHNAME(CLASS, OWNER) [[[NSBundle mainBundle] loadNibNamed:CLASS owner:OWNER options:nil] lastObject]

/* 异步 */

#define kGCDAsync(block) dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), block)

/* 同步 */

#define kGCDMain(block) dispatch_async(dispatch_get_main_queue(),block)

/*-----------------------------------界面尺寸--------------------------------------*/

/* 导航栏高度 */

#define kNavigationBarHeight 44

/* 工具栏高度 */

#define kTabBarHeight 49

/* 是否IPad */

#define kIsIpad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

/* 是否IPhone */

#define kIsIphone (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)

/* 获取系统信息 */

#define kSystemVersion [[UIDevice currentDevice] systemVersion]

/* 获取当前语言环境 */

#define kCurrentLanguage [[NSLocale preferredLanguages] objectAtIndex:0]

/* 获取当前APP版本 */

#define kAppVersion [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleVersion"]

/*-----------------------------------调试相关--------------------------------------*/

#ifdef DEBUG

#define XLOG(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);

#else

#define XLOG(...);

#endif

[3] 障蔽系统鼠标按键

来源: 互联网发布时间: 2014-02-18

屏蔽系统鼠标按键

在一些系统开发中(例如机顶盒)有可能遇到需求不响应鼠标按键,在开发中怎么解决呢?下面我来给大家演示:

1.系统中按键的响应都是通过在ViewRootImpl中传递给View的,所以要想屏蔽按键就要在ViewRootImpl.java中寻找;

2.在setView中sWindowSession.add(mWindow, mSeq, mWindowAttributes,getHostVisibility(), mAttachInfo.mContentInsets,mInputChannel);建立View与WMS的联系这样WMS就能把消息传递给View了,但是怎么传递的呢?答案是:mInputChannel.

 if (mInputChannel != null) {
                    if (mInputQueueCallback != null) {
                        mInputQueue = new InputQueue(mInputChannel);
                        mInputQueueCallback.onInputQueueCreated(mInputQueue);
                    } else {
                        InputQueue.registerInputChannel(mInputChannel, mInputHandler,
                                Looper.myQueue());
                    }
                }

响应回掉处理:

    private final InputHandler mInputHandler = new InputHandler() {
        public void handleKey(KeyEvent event, InputQueue.FinishedCallback finishedCallback) {
            startInputEvent(finishedCallback);
            dispatchKey(event, true);//处理按键
        }

        public void handleMotion(MotionEvent event, InputQueue.FinishedCallback finishedCallback) {
            startInputEvent(finishedCallback);
            dispatchMotion(event, true);//处理触摸,鼠标,摇杆等消息
        }
    };

3.下面看dispatchMotion函数:

private void dispatchMotion(MotionEvent event, boolean sendDone) {
        int source = event.getSource();
        if ((source & InputDevice.SOURCE_CLASS_POINTER) != 0) {
            Log.d(TAG,"----dispatchPointer----");
            dispatchPointer(event, sendDone);//在有鼠标点击事件时会调用
        } else if ((source & InputDevice.SOURCE_CLASS_TRACKBALL) != 0) {
            dispatchTrackball(event, sendDone);
            Log.d(TAG,"----dispatchTrackball----");
        } else {
            dispatchGenericMotion(event, sendDone);
            Log.d(TAG,"----dispatchGenericMotion----");
        }
    }

看dispatchPointer函数,其实里面就是发送了DISPATCH_POINTER消息真正处理是在deliverPointerEvent函数;所以只需要在deliverPointerEvent函数中处理,具体代码:

finishMotionEvent(event, sendDone, true);
return;