ios学习小结1.

选择界面

self.window=[[[UIWindow allow] initWithFrame [[UIScreen mainScreen] bounds]] autorelease];

self.viewController=[[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease]

self.winow.rootViewController=self.viewController'

[self.window makeKeyAndVisible];

return YES;

app尺寸，去掉状态栏

CGRect r = [ UIScreen mainScreen ].applicationFrame;

r=0，20，320，460

屏幕尺寸

CGRect rx = [ UIScreen mainScreen ].bounds;

r=0，0，320，480

状态栏尺寸

进入新界面

[self xxController:preplePicker animted:YES completion:nil];

关闭本界面

[self dismissViewControllerAnimated:YES completion:^{xxxxxxx}]

应用的生命周期：

Not Running 

Inactive

active 

Background

Suspenede

主要方法：

application:didFinishLaunchingWithOption:     UIAp...Notification

app.....DidBecomeActive:

app.....WillResignActive:

app.....licationDidEnterBackground:

app...WillEnterForeground:

app.....WillTerminate:

视图生命周期

viewDidLoad

viewWillAppear

viewDidAppear

viewWillDisappear

viewDidDisappear

didReceiveMeoryWarning

viewDidUnload

java中@synchronized的ios 

static dispatch_once_t once;

dispatch_once(&once,^{对象实例化});

协议 id<协议> delegate;

timer=[NSTimer scheduledTimerWithTimeInteral:3.0 target:self selector:@selector(handle:) userInfo:nil repeats:YES];

广播

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(hehe:) name:@"haha" object:nil];

[[NSNotificationCenter defaultCenter] postNotificationName:@"haha" object:nil userInfo:dataDict] 

-(void)hehe:(NSNotication*) notifcation

{

NSDictionary *he=[dataDict userInfo];

}

隐藏键盘.

- (IBAction)TextField_DidEndOnExit:(id)sender {

    // 

    [sender resignFirstResponder];

}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{

    [self.tltle resignFirstResponder];

    [self.content resignFirstResponder];

}

视图随键盘整体移动

-(void)textFieldDidBeginEditing:(UITextField *)textField

{

    

    CGRect frame = textField.frame;

    int offset = frame.origin.y + 32 - (self.view.frame.size.height - 216.0);//键盘高度216

    

    NSTimeInterval animationDuration = 0.30f;

    [UIView beginAnimations:@"ResizeForKeyboard" context:nil];

    [UIView setAnimationDuration:animationDuration];

    

    //将视图的Y坐标向上移动offset个单位，以使下面腾出地方用于软键盘的显示

    if(offset > 0)

        self.view.frame = CGRectMake(0.0f, -offset, self.view.frame.size.width, self.view.frame.size.height);

    

    [UIView commitAnimations];

}

-(void)textFieldDidEndEditing:(UITextField *)textField

{

    self.view.frame =CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);

}

键盘显示通知

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(received) name:UIKeyboardDidShowNotification object:nil];//键盘显示通知

路径显示

[[NSBundle mainBundle] pathForReource:  ofType]

日期格式

NSDate *theData=[NSDate date];

NSDateForMatter *dateFormatter=[[NSDateForMatter alloc] init];

[dateFormatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"];

NSString  *dateString=[dateFormatter stringFromDate:theDate];

在plist获取资源

NSBundle *bundle=[NSBundle mainBundle];

NSString *path=[bundle pathForResource:@"name" ofType:@"type"];

NSDictionary *dict=[[NSDictionary alloc] initWithContentsofFine:path]; 

//类似于getView

Cell *cell=[collectionView dequeResableCellWithReuseInentifier:@"Cell" forIndexPath:indexPath];

cell.label.text=.....;

cell.imageView.image=[UIImage imageNamed:[event objectForKey:@"image"]];

//设置值 类似于SharePreference

NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];

 [defaults setObject:@"123456abc" forKey:@"password_preference"]; 

self.password.text = [defaults stringForKey:@"password_preference"];