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OBJECTIVE C summary

Sun, 01 Feb 2015 18:18:00 GMT

- Primitive

Basic C primitive type are available in objective C

char/bool/int/long int/float/double/

BOOL defines yes/true/1 and no/false/0

- Additional Class

NSInteger, NSUInteger, NSFloat, NSNumber

for 64bit and 32bit CPU, the size of long, int may different, objective has additional class for these problem

-Special

id: id is a pointer which points to a object derived from NSObject.îî

nil: nil == NULL in c. nil means a NSObject point to a null object/ nothing

Nil: null class

SEL: is type from selector, define a method name.

NSString(@), BOOL (yes, no)

[OOP]

@interface: define the class, method declaration

@implementation: detail the interface

uppercast/downcast

[Memery]

Stack

Heap

@import url(http://www.shnenglu.com/CuteSoft_Client/CuteEditor/Load.ashx?type=style&file=SyntaxHighlighter.css);@import url(/css/cuteeditor.css);

攀�?/a> 2015-02-02 02:18 发表评论

iPad, PC, Mac Connect to a mac ox lion

Thu, 10 Nov 2011 06:22:00 GMT

Three accounts, test1 on iPad using Mocha VNC Lite, test2 on PC run VNC View, test3 on Mac using Screen sharing, remotely login in to a osx lion 10.7, and simultaneously run the different program.
Which indicates that osx lion supports multip-user login in, meanwhile, it allocates specific session and space for individual user.

攀�?/a> 2011-11-10 14:22 发表评论

机经

Tue, 08 Nov 2011 15:11:00 GMT

/Files/iuranus/test.pdf

攀�?/a> 2011-11-08 23:11 发表评论

UIView, UITouch, UIEvent 关系

Wed, 13 Apr 2011 03:54:00 GMT

攀�?/a> 2011-04-13 11:54 发表评论

mac 上看�|�络数据

Tue, 29 Mar 2011 08:59:00 GMT

packet peeper

http://sourceforge.net/projects/packetpeeper/

攀�?/a> 2011-03-29 16:59 发表评论

[webView loadHTMLString: baseURL:�Ҏ��使用问题

Tue, 22 Mar 2011 12:02:00 GMT

解析某网��HTML得到了此��文章的标题和正文内容，�q�用loadHTMLString:baseURL:�Ҏ��?span class=t_tag style="CURSOR: pointer; LINE-HEIGHT: normal; BORDER-BOTTOM: rgb(255,0,0) 1px solid; WHITE-SPACE: nowrap; WORD-WRAP: break-word" onclick=tagshow(event) href="tag.php?name=UIWebView">UIWebView中显�C�出来，但没有�Q何样式�?br style="LINE-HEIGHT: normal; WORD-WRAP: break-word">把CSS也加到工�E�里面，然后

[webView loadHTMLString:html baseURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] resourcePath]]];

复制代码

�q�样baseURL��指向了�E�序的资源�\径，�q�样Html代码��和css是一个�\径的。当然baseURL也可以写一个网�l��\径，�q�样��可以用�|�络上的CSS了�?br style="LINE-HEIGHT: normal; WORD-WRAP: break-word">
Javascript也是一��L��道理�Q�但是要注意�Q?js文�g默认会被当作代码�Q�所以把js文�g加入工程后，需要到XCode左栏的资源树�Q�找到Targerts->(你的�E�序名字)->Compile Sources那里�Q�找到新加入的js文�g�Q�把它们拖到Targerts->(你的�E�序名字)->Copy Bundle Resources里面去，��可以了�?br style="LINE-HEIGHT: normal; WORD-WRAP: break-word">
加入文�g到项目的时候有两个选项�Q�一个叫�?#8220;Recursively create groups for any added folders”一个叫�?#8220;Create Folder References for any added folders”。我们一般用前者，�q�样所有加�q�来的文仉��在资源目录的根目录。如果你需要你的JS或者CSS有目录结构，不跟HTML在一��P��而是有相对�\径关�pȝ��话，你可以用�W�二个选项�Q�加入一个目录进来，目录里面的文件进入资源的时候会保持相对路径关系�?/span>

攀�?/a> 2011-03-22 20:02 发表评论

xCode 4.0 issue list

Tue, 22 Mar 2011 11:57:00 GMT

1. iOS 4.3 documentation can not found in xCode 4.0, please going into XCode | Preferences, under the Documentation tab, get iOS4.3 Library(458M)

攀�?/a> 2011-03-22 19:57 发表评论

iOS书籍随笔

Thu, 10 Mar 2011 04:53:00 GMT

- [iPhone开发书�c�大全].Programming.in.Objective-C.2.0.2nd(Addison.Wesley.2009)
关于深浅拯��讲的透彻
- Programming.in.Objective-C.2.0.2nd(Addison.Wesley.2009)
归档�Q�NSCopying�Q�NSCoding

攀�?/a> 2011-03-10 12:53 发表评论

Wed, 09 Mar 2011 09:51:00 GMT

一 �pȝ��内置对象��d��x��?span>

- If your objects are of type NSString,NSDictionary,NSArray,NSDate,NSData, or NSNumber, you can use the writeToFile:atomically: method implemented in these classes to write your data to a file. In the case of writing out a dictionary or an array, this method writes the data to the file in the format of an XML property list. Program 19.1 shows how the dictionary you created as a simple glossary in Chapter 15,“Numbers, Strings, and Collections,” can be written to a file as a property list.

Program 19.1

#import

int main (int argc, char *argv[])

{

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

NSDictionary *glossary =

[NSDictionary dictionaryWithObjectsAndKeys:

@”A class defined so other classes can inherit from it.”, @”abstract class”,

@”To implement all the methods defined in a protocol”, @”adopt”,

@”Storing an object for later use. “, @”archiving”,

nil

];

if ([glossary writeToFile: @”glossary” atomically: YES] == NO)

NSLog (@”Save to file failed!”);

[pool drain];

return 0;

}

- To read an XML property list from a file into your program, you use the dictionaryWithContentsOfFile: or arrayWithContentsOfFile: methods.To read back data, use the dataWithContentsOfFile: method; to read back string objects, use the stringWithContentsOfFile:method. Program 19.2 reads back the glossary written in Program 19.1 and then displays its contents.

#import

int main (int argc, char *argv[])

{

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

NSDictionary *glossary;

glossary = [NSDictionary dictionaryWithContentsOfFile: @”glossary”];

for ( NSString *key in glossary )

NSLog (@”%@: %@”, key, [glossary objectForKey: key]);

[pool drain];

return 0;

}

�?自定义对象读写至文�g

- A more flexible approach enables you to save any type of objects to a file, not just strings, arrays, and dictionaries.This is done by creating a keyed archive using the NSKeyedArchiver class.
This implies that you can’t directly archive your AddressBook using this technique because the Objective-C system doesn’t know how to archive an AddressBook object. If you tried to archive it by inserting a line such as NSKeyedArchiver archiveRootObject: myAddressBook toFile: @”addrbook.arch”]; into your program, you’d get the following message displayed if you ran the program:

*** -[AddressBook encodeWithCoder:]: selector not recognized
*** Uncaught exception:
*** -[AddressBook encodeWithCoder:]: selector not recognized
archiveTest: received signal: Trace/BPT trap
To archive objects other than those listed, you must tell the system how to archive, or encode, your objects, and also how to unarchive, or decode, them.This is done by adding encodeWithCoder: and initWithCoder: methods to your class definitions, according to the protocol. For our address book example, you’d have to add these methods to both the AddressBook and AddressCard classes.

The encodeWithCoder: method is invoked each time the archiver wants to encode an object from the specified class, and the method tells it how to do so. In a similar manner, the initWithCoder: method is invoked each time an object from the specified class is to be decoded.

Program 19.5 Addresscard.h Interface File
#import
#import
#import
@interface AddressCard: NSObject
{
NSString *name;
NSString *email;
}
@property (copy, nonatomic) NSString *name, *email;
-(void) setName: (NSString *) theName andEmail: (NSString *) theEmail;
-(NSComparisonResult) compareNames: (id) element;
-(void) print;
// Additional methods for NSCopying protocol
-(AddressCard *) copyWithZone: (NSZone *) zone;
-(void) retainName: (NSString *) theName andEmail: (NSString *) theEmail;

@end

-(void) encodeWithCoder: (NSCoder *) encoder
{
[encoder encodeObject: name forKey: @”AddressCardName”];
[encoder encodeObject: email forKey: @”AddressCardEmail”];
}
-(id) initWithCoder: (NSCoder *) decoder
{
name = [[decoder decodeObjectforKey: @”AddressCardName”] retain];
email = [[decoder decodeObjectforKey: @”AddressCardEmail”] retain];
return self;
}

#import “AddressBook.h”
#import
int main (int argc, char *argv[])
{
NSString *aName = @”Julia Kochan”;
NSString *aEmail = @”jewls337@axlc.com”;
NSString *bName = @”Tony Iannino”;
NSString *bEmail = @”tony.iannino@techfitness.com”;
NSString *cName = @”Stephen Kochan”;
NSString *cEmail = @”steve@steve_kochan.com”;
NSString *dName = @”Jamie Baker”;
NSString *dEmail = @”jbaker@hitmail.com”;
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
AddressCard *card1 = [[AddressCard alloc] init];
AddressCard *card2 = [[AddressCard alloc] init];
AddressCard *card3 = [[AddressCard alloc] init];
AddressCard *card4 = [[AddressCard alloc] init];
AddressBook *myBook = [AddressBook alloc];
// First set up four address cards
[card1 setName: aName andEmail: aEmail];
[card2 setName: bName andEmail: bEmail];
[card3 setName: cName andEmail: cEmail];
[card4 setName: dName andEmail: dEmail];
myBook = [myBook initWithName: @”Steve’s Address Book”];
// Add some cards to the address book
[myBook addCard: card1];
[myBook addCard: card2];
[myBook addCard: card3];
[myBook addCard: card4];
[myBook sort];
if ([NSKeyedArchiver archiveRootObject: myBook toFile: @”addrbook.arch”] == NO)
NSLog (@”archiving failed”);
[card1 release];
[card2 release];
[card3 release];
[card4 release];
[myBook release];
[pool drain];
return 0;
}

Program 19.7 shows how you can read the archive into memory to set up the address
book from a file.
Program 19.7
#import “AddressBook.h”
#import
int main (int argc, char *argv[])
{
AddressBook         *myBook;
NSAutoreleasePool   * pool = [[NSAutoreleasePool alloc] init];
myBook = [NSKeyedUnarchiver unarchiveObjectWithFile: @”addrbook.arch”];
[myBook list];
[pool drain];
return 0;
}

�?使用NSData��d��文�g

- You might not want to write your object directly to a file using the archiveRootObject:ToFile: method, as was done in the previous program examples.For example, perhaps you want to collect some or all of your objects and store them in a single archive file.You can do this in Objective-C using the general data stream object class called NSData.

int main (int argc, char *argv[])
{
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
Foo               *myFoo1 = [[Foo alloc] init];
Foo               *myFoo2;
NSMutableData     *dataArea;
NSKeyedArchiver   *archiver;
AddressBook       *myBook;
// Insert code from Program 19.7 to create an Address Book
// in myBook containing four address cards
[myFoo1 setStrVal: @”This is the string”];
[myFoo1 setIntVal: 12345];
[myFoo1 setFloatVal: 98.6];
// Set up a data area and connect it to an NSKeyedArchiver object
dataArea = [NSMutableData data];
archiver = [[NSKeyedArchiver alloc]
initForWritingWithMutableData: dataArea];
// Now we can begin to archive objects
[archiver encodeObject: myBook forKey: @”myaddrbook”];
[archiver encodeObject: myFoo1 forKey: @”myfoo1”];
[archiver finishEncoding];
// Write the archived data are to a file
if ( [dataArea writeToFile: @”myArchive” atomically: YES] == NO)
NSLog (@”Archiving failed!”);
[archiver release];
[myFoo1 release];
[pool drain];
return 0;
}

- Restoring the data from your archive file is simple:You just do things in reverse. First, you need to allocate a data area like before.Next, you need to read your archive file into the data area; then you have to create an SKeyedUnarchiver object and tell it to decode data from the specified area.You must invoke decode methods to extract and decode your archived objects.When you’re finished, you send a finishDecoding message to the NSKeyedUnarchiver object.

#import
#import
#import
#import
#import
#import
#import “AddressBook.h”
#import “Foo.h”
int main (int argc, char *argv[])
{
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
NSData            *dataArea;
NSKeyedUnarchiver *unarchiver;
Foo               *myFoo1;
AddressBook       *myBook;
// Read in the archive and connect an
// NSKeyedUnarchiver object to it
dataArea = [NSData dataWithContentsOfFile: @”myArchive”];
if (! dataArea) {
NSLog (@“Can’t read back archive file!”);
Return (1);
}
unarchiver = [[NSKeyedUnarchiver alloc]
initForReadingWithData: dataArea];
// Decode the objects we previously stored in the archive
myBook = [unarchiver decodeObjectForKey: @”myaddrbook”];
myFoo1 = [unarchiver decodeObjectForKey: @”myfoo1”];
[unarchiver finishDecoding];
[unarchiver release];
// Verify that the restore was successful
[myBook list];
NSLog (“%@\n%i\n%g”, [myFoo1 strVal],
[myFoo1 intVal], [myFoo1 floatVal]);
[pool release];
return 0;
}

参考：Programming.in.Objective-C.2.0.2nd(Addison.Wesley.2009)
�?

攀�?/a> 2011-03-09 17:51 发表评论

Thu, 06 Jan 2011 03:58:00 GMT

今天调查了下IOS 4.0 支持的多��d��的事宜，�pȝ��?/span>4.2�Q?/span> 初步�l�果如下�Q?/span>

Ios 4.0 多�Q务不是传�l�意义上的多��d��。只是把�E�序的状态保存�v来，�E�序挂�v。因�?/span>Apple�q�没准备好多��d��同时�q�行�Q?/span>

主要是因�?/span>battery�?/span>memory�q�两个问题还没有解决�?/span>

现在IOS 4多�Q务支持的�c�d��Q�官�|�）�Q?/span>

§ Background audio

§ Voice over IP

§ Background location

§ Push notifications

§ Local notifications

§ Task finishing - If your app is in mid-task when your customer leaves it, the app can now keep running to finish the task.

§ Fast app switching - All developers should take advantage of fast app switching, which allows users to leave your app and come right back to where they were when they left - no more having to reload the app.

我��用的�?/font>Task finishing�Q?/span> 既当用户挂�v�E�序�Ӟ��如果�q�有task没完成，可以把改task完成�?/span>

但这个是有限制的�Q�时间的限制�Q�就是说你的后台�E�序不能执行��过某个旉��?/span>

我刚才打log看了�Q�系�l�返�?/span>500s�Q�既�?/span>8分钟�Q?/span>8分钟如果�q�没执行完，��׃��自动把我们程序结束�?/span>

代码如下

#pragma mark -

#pragma mark Background Task Handle

- (void)applicationDidEnterBackground:(UIApplication *)application {

// Request permission to run in the background. Provide an

// expiration handler in case the task runs long.

NSAssert(self->bgTask == UIBackgroundTaskInvalid, nil);

self->bgTask = [application beginBackgroundTaskWithExpirationHandler: ^{

// Synchronize the cleanup call on the main thread in case

// the task catully finished at around the same time.

dispatch_async(dispatch_get_main_queue(), ^{

if (UIBackgroundTaskInvalid != self->bgTask) {

[application endBackgroundTask:self->bgTask];

self->bgTask = UIBackgroundTaskInvalid;

}

});

}];

// Start the long-running task and return immediately.

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0),

// Do the work assoicated with the task.

for(int i = 0; i < 1000; i++) {

//request network.

NSLog(@"hahah %d, Time Remain = %f", i, [application backgroundTimeRemaining]);

}

// Synchronize the cleanup all on the main thread in case

// the task catully finished at around the same time.

dispatch_async(dispatch_get_main_queue(), ^{

if (UIBackgroundTaskInvalid != self->bgTask) {

[application endBackgroundTask:self->bgTask];

self->bgTask = UIBackgroundTaskInvalid;

}

});

}

#pragma mark -

#pragma mark Local Notifications

- (void)scheduleAlarmForDate:(NSDate *)theDate {

UIApplication *app = [UIApplication sharedApplication];

NSArray *oldNotifications = [app scheduledLocalNotifications];

// Clear out the old notification before scheduling a new one.

if (0 < [oldNotifications count]) {

[app cancelAllLocalNotifications];

}

// Create a new notification

UILocalNotification *alarm = [[UILocalNotification alloc] init];

if (alarm) {

alarm.fireDate = theDate;

alarm.timeZone = [NSTimeZone defaultTimeZone];

alarm.repeatInterval = 0;

alarm.soundName = @"ping.caf";//@"default";

alarm.alertBody = [NSString stringWithFormat:@"Time to wake up!Now is\n[%@]",

[NSDate dateWithTimeIntervalSinceNow:10]];

[app scheduleLocalNotification:alarm];

[alarm release];

}

有问题留�a��Q�或者微�?http://t.sina.com.cn/passionuranus

攀�?/a> 2011-01-06 11:58 发表评论

objective c实现配置文�g+反射工厂创徏

Thu, 16 Dec 2010 03:00:00 GMT

1. 先写plist配置文�g

plist写到resouce里面�?/p>

通过NSBundle把数据取plist��d��?/p>

2. 通过NSClassFromString创徏�c?/span>

NSClassFromString

NSSelectorFromString

正常来说�Q?/p>

id myObj = [[NSClassFromString(@"MySpecialClass") alloc] init];

�?/strong>

id myObj = [[MySpecialClass alloc] init];

是一��L��。但是，如果你的�E�序中�ƈ不存在MySpecialClass�q�个�c�，下面的写法会出错�Q�而上面的写法只是�q�回一个空对象而已�?/p>

因此�Q�在某些情况下，可以使用NSClassFromString来进行你不确定的�cȝ��初始化�?/p>

比如在iPhone中，NSTask可能��׃��出现�q�种情况�Q�所以在你需要��用NSTask�Ӟ��最好��用：

[[NSClassFromString(@"NSTask") .....]]

而不要直接��用[NSTask ...]�q�种写法�?/p>

NSClassFromString的好处是�Q?/font>

1 弱化�q�接�Q?font color="#000000" style="line-height: normal; ">因此�q�不会把没有的Framework也link到程序中�?/font>

2 不需要��用import�Q?font color="#000000" style="line-height: normal; ">因�ؓ�c�L��动态加载的�Q�只要存在就可以加蝲�?/font>

for (int c=0; c<[classNames count]; c++) {
NSString *className=[classNames objectAtIndex:c];
id class=[[NSClassFromString(className) alloc] init];
for (int i=0; i<[params count]; i++) {
[class performSelector:NSSelectorFromString([NSString stringWithFormat:@"setA%i",i])];
}
}

有问题，��L��a�

新浪微博�Q�Passionuranus

攀�?/a> 2010-12-16 11:00 发表评论

Objective C基本数据�c�d��

Tue, 14 Dec 2010 10:48:00 GMT
�׃��U?

1. int
输出格式�W�：%i, %d, %o %x,

2. float
输出格式�W�：%f, %e, %g

3. double
输出格式�W�：%f, %e, %g

4. char
输出格式�W�：%c

限定�W�：

1. long
long int: %li
long double: %Lf
形成long int通过在数字后面加L.
long int number = 123324123234123L;

2. long long
long long int: %lli

3. short
short int: %hi

4. unsigned

short

unsigned

signed

攀�?/a> 2010-12-14 18:48 发表评论

Tue, 14 Dec 2010 10:33:00 GMT
没时间写blog�Q�但我发两个官方文档大家可以作�ؓ参�?
1. 如何�~�译distribution�Q?adhoc�{�版�?/div>
http://wenku.baidu.com/view/ba98defff705cc175527094c.html

2. 上传前的准备,既是使用itunes connect

http://wenku.baidu.com/view/949a954de518964bcf847c7c.html

有问题，��L��a�

新浪微博�Q�Passionuranus

攀�?/a> 2010-12-14 18:33 发表评论