先放效果图：

-概览

首先放上xib界面图

-改界面名字

建项目的过程中一开始不小心取了个没有远见的名字“考研倒计时”，后来改成了倒计时。怎么改呢？我是这样改的：（比如程序的window，上面的menuitem类同）

顺手把Resize的钩钩去掉

把Full Screen改成Primary Window蛮有意思的。（试试把Resize勾上再全屏）

-拖入控件

这里我一开始只拖进去这5句话（NSTextField），双击控件先把文字改个样子做个效果。在右边顺便把字体改了。

后来如图又加入了一个NSImageView 以作背景

在Attribute Inspector中改成我事先找好的图，并把Scaling改成AxesIndependently 这样图片就可以适当的放缩了。

-代码&优化

一开始我的代码是这样的，后来又加了纪念日、软考等，代码是直接“拷贝”复用的。

#pragma mark - 设置 -

NSDateComponents *components=[[NSDateComponents alloc]init];//创建组件

#pragma mark 考研

  \[components setMonth:1\];

  \[components setDay:4\];

  \[components setYear:2015\];

  \[components setHour:7\];

  NSDate \*targetDate = \[\[NSCalendar currentCalendar\] dateFromComponents:components\];

  NSTimeInterval targetInteval = \[targetDate timeIntervalSinceNow\];

// NSLog(@"%f",KYinteval);

NSLog(@"%d",(int)targetInteval/60/60/24);

\[\_KYLabel setStringValue:\[NSString stringWithFormat:@"距离考研还有%d天！",(int)targetInteval/60/60/24\]\];

.csharpcode, .csharpcode pre

{

font-size: small;

color: black;

font-family: consolas, "Courier New", courier, monospace;

background-color: #ffffff;

/white-space: pre;/

}

.csharpcode pre { margin: 0em; }

.csharpcode .rem { color: #008000; }

.csharpcode .kwrd { color: #0000ff; }

.csharpcode .str { color: #006080; }

.csharpcode .op { color: #0000c0; }

.csharpcode .preproc { color: #cc6633; }

.csharpcode .asp { background-color: #ffff00; }

.csharpcode .html { color: #800000; }

.csharpcode .attr { color: #ff0000; }

.csharpcode .alt

{

background-color: #f4f4f4;

width: 100%;

margin: 0em;

}

.csharpcode .lnum { color: #606060; }

v2版把倒计时计算抽成了一个类，提高程序的复用性。

用法如下：（使用了Delegate思想和静态实例化思想）

ZZYDateCounter*dc=[ZZYDateCounter CounterWithTargetYear:2015mounth:1day:4hour:7andSentence:@"距离考研还有%d天！"];

dc.textDelegate=\_KYLabel;

\[dc say\];

.csharpcode, .csharpcode pre

{

font-size: small;

color: black;

font-family: consolas, "Courier New", courier, monospace;

background-color: #ffffff;

/white-space: pre;/

}

.csharpcode pre { margin: 0em; }

.csharpcode .rem { color: #008000; }

.csharpcode .kwrd { color: #0000ff; }

.csharpcode .str { color: #006080; }

.csharpcode .op { color: #0000c0; }

.csharpcode .preproc { color: #cc6633; }

.csharpcode .asp { background-color: #ffff00; }

.csharpcode .html { color: #800000; }

.csharpcode .attr { color: #ff0000; }

.csharpcode .alt

{

background-color: #f4f4f4;

width: 100%;

margin: 0em;

}

.csharpcode .lnum { color: #606060; }

ZZYDateCounter源代码如下：（提供了使用NSDate初始化和直接使用年月日小时直接初始化的两个接口，为以后的扩展预留接口）

//

// ZZYDateCounter.h

// 考研倒计时

//

// Created by 张泽阳 on 3/14/14.

// Copyright (c) 2014 张泽阳. All rights reserved.

//

#import

@interface ZZYDateCounter : NSObject

@property NSTextField* textDelegate;

-(void)say;

+(ZZYDateCounter*)CounterWithTargetDate:(NSDate*)targetDate andTargetSentence:(NSString*)targetSentence;

+(ZZYDateCounter*)CounterWithTargetYear:(int)y mounth:(int)m day:(int)d hour:(int)h andSentence:(NSString*)targetSentence;

@end

//

// ZZYDateCounter.m

// 考研倒计时

//

// Created by 张泽阳 on 3/14/14.

// Copyright (c) 2014 张泽阳. All rights reserved.

//

#import "ZZYDateCounter.h"

@implementation ZZYDateCounter{

NSDateComponents \*components;

NSString\* counterSentence;

NSTimeInterval targetInteval;

NSDate \*targetDate ;

}

-(id)init{

if (self=\[super init\]) {

    components=\[\[NSDateComponentsalloc\]init\];//创建组件

}

returnself;

}

-(id)initWithDate:(NSDate*)date andSentence:(NSString*)sentence{

if ((self=self.init)) {

// form http://blog.sina.com.cn/s/blog_8732f19301010fxd.html

// NSDate 相互转换

//

// NSDateComponents *comps = [[NSDateComponents alloc] init];

//

// [comps setDay:6];

//

// [comps setMonth:5];

//

// [comps setYear:2004];

//

// NSCalendar *gregorian = [[NSCalendar alloc]

//

// initWithCalendarIdentifier:NSGregorianCalendar];

//

// NSDate *date = [gregorian dateFromComponents:comps];

//

// [comps release];

//

// NSDateComponents *weekdayComponents =

//

// [gregorian components:NSWeekdayCalendarUnit fromDate:date];

//

// int weekday = [weekdayComponents weekday];

    NSCalendar \*gregorian = \[\[NSCalendar alloc\]

                            initWithCalendarIdentifier:NSGregorianCalendar\];

    components=\[gregorian components:NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit |NSHourCalendarUnitfromDate:date\];

    counterSentence=\[NSString stringWithString:sentence\];

        } ;

returnself;

}

-(void)say{

targetDate = \[\[NSCalendarcurrentCalendar\] dateFromComponents:components\];

targetInteval = \[targetDatetimeIntervalSinceNow\];

if (targetInteval<0) {

    targetInteval=-targetInteval;

}

\[\_textDelegatesetStringValue:\[NSStringstringWithFormat:counterSentence,(int)targetInteval/60/60/24\]\];

}

-(id)initWithYear:(int)y mounth:(int)m day:(int)d hour:(int)hour andSentence:(NSString*)sentence{

 if ((self=self.init)) {

     \[components setMonth:m\];

         \[components setDay:d\];

        \[components setYear:y\];

     \[components setHour:hour\];

      counterSentence=\[NSString stringWithString:sentence\];

 }

returnself;

}

+(ZZYDateCounter *)CounterWithTargetDate:(NSDate *)targetDate andTargetSentence:(NSString *)targetSentence{

    ZZYDateCounter\* counter = \[\[ZZYDateCounteralloc\] init\];

return \[counter initWithDate:targetDate andSentence:targetSentence\];

}

+(ZZYDateCounter*)CounterWithTargetYear:(int)y mounth:(int)m day:(int)d hour:(int)h andSentence:(NSString *)targetSentence{

ZZYDateCounter\* counter = \[\[ZZYDateCounteralloc\] init\];

return \[counter initWithYear:y mounth:m day:d hour:h andSentence:targetSentence\];

 }

@end

.csharpcode, .csharpcode pre

{

font-size: small;

color: black;

font-family: consolas, "Courier New", courier, monospace;

background-color: #ffffff;

/white-space: pre;/

}

.csharpcode pre { margin: 0em; }

.csharpcode .rem { color: #008000; }

.csharpcode .kwrd { color: #0000ff; }

.csharpcode .str { color: #006080; }

.csharpcode .op { color: #0000c0; }

.csharpcode .preproc { color: #cc6633; }

.csharpcode .asp { background-color: #ffff00; }

.csharpcode .html { color: #800000; }

.csharpcode .attr { color: #ff0000; }

.csharpcode .alt

{

background-color: #f4f4f4;

width: 100%;

margin: 0em;

}

.csharpcode .lnum { color: #606060; }

在AppDelegate中添加下面两个方法：

//关闭Window后退出程序

-(BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender{

NSLog(@"ttt");

returnYES;

}

//当然少不了彩蛋了！

- (IBAction)onAboutClicked:(NSMenuItem *)sender {

NSAlert \*alert = \[NSAlertalertWithMessageText:@"关于这个软件"defaultButton:@"我也爱你" alternateButton:nilotherButton:nilinformativeTextWithFormat:@"为我家亲爱的编写，祝我们都能考上好研究生，一辈子在一起！\\n永远爱我家文儿！"\];

\[alert beginSheetModalForWindow:\_windowcompletionHandler:nil\];

}

.csharpcode, .csharpcode pre

{

font-size: small;

color: black;

font-family: consolas, "Courier New", courier, monospace;

background-color: #ffffff;

/white-space: pre;/

}

.csharpcode pre { margin: 0em; }

.csharpcode .rem { color: #008000; }

.csharpcode .kwrd { color: #0000ff; }

.csharpcode .str { color: #006080; }

.csharpcode .op { color: #0000c0; }

.csharpcode .preproc { color: #cc6633; }

.csharpcode .asp { background-color: #ffff00; }

.csharpcode .html { color: #800000; }

.csharpcode .attr { color: #ff0000; }

.csharpcode .alt

{

background-color: #f4f4f4;

width: 100%;

margin: 0em;

}

.csharpcode .lnum { color: #606060; }

最后，别忘了

设置为开机自启:)

心得体会：

Mac下开发果然特别舒服，和IOS一脉相承。了解了NSImageView和NSTextView和NSWindow 等控件。

计划以后继续深入了解如：

改变部分字体颜色和文字大小、

改进NSWindow的外观、

使用快捷键进出全屏

等。

还有，感觉排版很渣。。。MarsEdit还不是很熟。。继续努力！