- (id)init;	// designated initializer
- (id)initWithTarget:(id)target selector:(SEL)selector object:(id)argument;

+ (void)detachNewThreadSelector:(SEL)aSelector toTarget:(id)aTarget withObject:(id)anArgument

- (void)start;

//  SellTicketsAppDelegate.h
import <UIKit/UIKit.h>
 
@interface SellTicketsAppDelegate : NSObject <UIApplicationDelegate> {
     int tickets;
     int count;
     NSThread* ticketsThreadone;
     NSThread* ticketsThreadtwo;
     NSCondition* ticketsCondition;
     UIWindow *window;
 }
@property (nonatomic, retain) IBOutlet UIWindow *window;
@end

//  SellTicketsAppDelegate.m
import "SellTicketsAppDelegate.h"
 
@implementation SellTicketsAppDelegate
@synthesize window;
 
- (void)applicationDidFinishLaunching:(UIApplication *)application {
     tickets = 100;
     count = 0;
     // 锁对象
     ticketCondition = [[NSCondition alloc] init];
     ticketsThreadone = [[NSThread alloc] initWithTarget:self selector:@selector(run) object:nil];
     [ticketsThreadone setName:@"Thread-1"];
     [ticketsThreadone start];  
 
 
     ticketsThreadtwo = [[NSThread alloc] initWithTarget:self selector:@selector(run) object:nil];
     [ticketsThreadtwo setName:@"Thread-2"];
     [ticketsThreadtwo start];
     //[NSThread detachNewThreadSelector:@selector(run) toTarget:self withObject:nil];
      // Override point for customization after application launch
     [window makeKeyAndVisible]; 
 
 }
 
- (void)run{
     while (TRUE) {
     	// 上锁
         [ticketsCondition lock];
         if(tickets > 0){
             [NSThread sleepForTimeInterval:0.5];
             count = 100 - tickets;
             NSLog(@"当前票数是:%d,售出:%d,线程名:%@",tickets,count,[[NSThread currentThread] name]);
             tickets--;
         }else{
             break;
         }
         [ticketsCondition unlock];
     }
 }
 
- (void)dealloc {
	[ticketsThreadone release];
     [ticketsThreadtwo release];
     [ticketsCondition release]; 
     [window release];
     [super dealloc];
}
@end

- (void)performSelectorOnMainThread:(SEL)aSelector withObject:(id)arg waitUntilDone:(BOOL)wait

- (void)startTheBackgroundJob {
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    // to do something in your thread job
    ...
    [self performSelectorOnMainThread:@selector(makeMyProgressBarMoving) withObject:nil waitUntilDone:NO];
    [pool release];
}

#import
#import “SQLitePersistentObject.h”
//Person.m的生成略，大家都应该知道的
@interface Person : SQLitePersistentObject {
NSString *iName;
int iAge;
}
@property (nonatomic, retain) NSString * iName;
@property (nonatomic) int iAge;
@end

Person *person = [[Person alloc] init];
person.iName = @”leeguoli”;
person.iAge = 20;

[person save];

NSArray *people = [Person findByIName:@"'lee%'"];//这里实际有点像like语句，where iName like 'lee%'

Person *leeguoli = [Person findFirstByCriteria:@"WHERE i_name = 'leeguoli' AND i_age = 20];

   CFBundleName="中文名";   
   CFBundleDisplayName="中文名";

   CFBundleName="EnglishName";   
   CFBundleDisplayName="EnglishName";

-(void)viewDidLoad{
 [super viewDidLoad];
 self.pic = [UIImage imageNamed:@"snow.png"];//初始化图片
 //启动定时器，实现飘雪效果
 [NSTimer scheduledTimerWithTimeInterval:(0.2) target:self selector:@selector(ontime) userInfo:nil repeats:YES];
}

-(void)ontime{
 UIImageView *view = [[UIImageView alloc] initWithImage:pic];//声明一个UIImageView对象，用来添加图片
 view.alpha = 0.5;//设置该view的alpha为0.5，半透明的
 int x = round(random()%320);//随机得到该图片的x坐标
 int y = round(random()%320);//这个是该图片移动的最后坐标x轴的
 int s = round(random()%15)+10;//这个是定义雪花图片的大小
 int sp = 1/round(random()%100)+1;//这个是速度
 view.frame = CGRectMake(x, -50, s, s);//雪花开始的大小和位置
 [self.view addSubview:view];//添加该view
 [UIView beginAnimations:nil context:view];//开始动画
 [UIView setAnimationDuration:10*sp];//设定速度
 view.frame = CGRectMake(y, 500, s, s);//设定该雪花最后的消失坐标
 [UIView setAnimationDelegate:self];
 [UIView commitAnimations];
}

NSString *urlString = [NSString stringWithFormat:@"http://www.voland.com.cn:8080/weather/weatherServlet?city=%@",kcityID];
NSURL *url = [NSURL URLWithString:urlString];
NSMutableURLRequest *request = [NSMutableURLRequest  requestWithURL:url];
NSURLConnection *aUrlConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:true];
self.urlConnection = aUrlConnection;//这里的urlConnection在头文件中定义的变量
[self.urlConnection start];//开始连接网络
[aUrlConnection release];
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response  {
NSLog(@"接收完响应:%@",response);
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data  {
NSLog(@"接收完数据:");
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error  {
NSLog(@"数据接收错误:%@",error);
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection  {
NSLog(@"连接完成:%@",connection);
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
}

NSString *content=[[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding];
[request setHTTPBody: content];  
[request setHTTPMethod: @"POST"];  
[request setValue:@"Close" forHTTPHeaderField:@"Connection"];  
[request setValue:@"www.voland.com.cn" forHTTPHeaderField:@"Host"];  
[request setValue:[NSString stirngWithFormat@"%d",[content length]] forHTTPHeaderField:@"Content-Length"];

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; 
NSArray *languages = [defaults objectForKey:@"AppleLanguages"]; 
NSLog(@"%@", languages);

//括号里第一个参数是要显示的内容,与各Localizable.strings中的id对应
//第二个是对第一个参数的注释,一般可以为空串
[_alertView setTitle:NSLocalizedString(@"Submitted successfully",@"")];

genstrings -o English.lproj  ./classes/*.m
genstrings -o zh.lproj  ./classes/*.m

"Submitted successfully" = "提交成功"

[UIView beginAnimations:@"Curl"context:nil];//动画开始
[UIView setAnimationDuration:0.75];
[UIView setAnimationDelegate:self];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:myview cache:YES];
[myview removeFromSuperview];
[UIView commitAnimations];

CATransition *animation = [CATransition animation];
[animation setDuration:1.25f];
[animation setTimingFunction:[CAMediaTimingFunction
functionWithName:kCAMediaTimingFunctionEaseIn]];
[animation setType:kCATransitionReveal];
[animation setSubtype: kCATransitionFromBottom];
[self.view.layer addAnimation:animation forKey:@"Reveal"];

setType:可以返回四种类型：
kCATransitionFade淡出
kCATransitionMoveIn覆盖原图
kCATransitionPush推出
kCATransitionReveal底部显出来
setSubtype:也可以有四种类型：
kCATransitionFromRight；
kCATransitionFromLeft(默认值)
kCATransitionFromTop；
kCATransitionFromBottom

[animation setType:@"suckEffect"];

pageCurl   向上翻一页
pageUnCurl 向下翻一页
rippleEffect 滴水效果
suckEffect 收缩效果，如一块布被抽走
cube 立方体效果
oglFlip 上下翻转效果

// Curl the image up or down
CATransition *animation = [CATransition animation];
[animation setDuration:0.35];
[animation setTimingFunction:UIViewAnimationCurveEaseInOut];
if (!curled){
//animation.type = @"mapCurl";
animation.type = @"pageCurl";
animation.fillMode = kCAFillModeForwards;
animation.endProgress = 0.99;
} else {
//animation.type = @"mapUnCurl";
animation.type = @"pageUnCurl";
animation.fillMode = kCAFillModeBackwards;
animation.startProgress = 0.01;
}
[animation setRemovedOnCompletion:NO];
[view exchangeSubviewAtIndex:0 withSubviewAtIndex:1];
[view addAnimation:animation forKey"pageCurlAnimation"];
// Disable user interaction where necessary
if (!curled) {
 
} else {
 
}
curled = !curled;

// add target/action for particular event. you can call this multiple times and you can specify multiple target/actions for a particular event.
// passing in nil as the target goes up the responder chain. The action may optionally include the sender and the event in that order
// the action cannot be NULL.
- (void)addTarget:(id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents;

//第一步,对组件增加监听器
[textField addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
...
//第二步,实现回调函数
- (void) textFieldDidChange:(id) sender {
	UITextField *_field = (UITextField *)sender;
	NSLog(@"%@",[_field text]);
}

//NSString+URLEncoding.h
#import 
 
@interface NSString (URLEncodingAdditions)
- (NSString *)URLEncodedString;
- (NSString *)URLDecodedString;
@end

//NSString+URLEncoding.m
#import "NSString+URLEncoding.h"
@implementation NSString (OAURLEncodingAdditions)
 
- (NSString *)URLEncodedString
{
    NSString *result = (NSString *)
       CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
                                                  (CFStringRef)self,
                                                  NULL,
                                                  CFSTR("!*'();:@&=+$,/?%#[] "),
                                                  kCFStringEncodingUTF8);
    [result autorelease];
    return result;
}
 
- (NSString*)URLDecodedString
{
    NSString *result = (NSString *)
       CFURLCreateStringByReplacingPercentEscapesUsingEncoding(kCFAllocatorDefault,
						(CFStringRef)self,
				 		CFSTR(""),
	  					kCFStringEncodingUTF8);
    [result autorelease];
    return result;
}
@end