iPhone 开发技术

UsingBlocksAsContextInfo - Demonstrates how to implement Objective-C "blocks" passed in as the 'contextInfo' to NSAlert, helping to handle the alert result.

// This is a quick tip on how to use the context info as a block parameter.

// You can use this type of pattern for any methods that have a delegate/selector/contextInfo pattern.

- (void)btnShowAlertClicked:(id)sender  {

    NSAlert *alert = [NSAlert alertWithMessageText:@"Alert Message"

                                     defaultButton:@"Default Button"

                                   alternateButton:@"Alternate Button"

                                       otherButton:@"Other Button"

                         informativeTextWithFormat:@"Informative Text"];

    BOOL someLocalVariable = YES;

    // We create a block that can easily access local variables to this method.

    // This is much easier than trying to package them all up into a contextInfo object

    void (^blockCallback)(NSInteger) = ^(NSInteger returnCode) {

        // Inside the block callback we can easily access locals

        if (someLocalVariable) {

            if (returnCode == NSAlertDefaultReturn) {

                [button setTitle:@"Default Return Button Clicked!"];

            } else {

                [button setTitle:@"Something else clicked...try again."];

            }

        }

    };

    // We copy the block, since it needs to stay alive for longer than the current scope

    [alert beginSheetModalForWindow:self.window

                      modalDelegate:[self class]

                     didEndSelector:@selector(alertDidEnd:returnCode:contextInfo:)

                        contextInfo:Block_copy(blockCallback)];

}

+ (void)alertDidEnd:(NSAlert *)alert returnCode:(NSInteger)returnCode contextInfo:(void (^)(NSInteger returnCode))continuationHandler {

    continuationHandler(returnCode);

    // The block must always be retained before the first call. This is the matching release

    Block_release(continuationHandler);

}

static void _processData(AppDelegate *self, NSInteger i) {

    // Notice that the _window can be accessed here, even though it is a private ivar

    // A compiler error (or warning) will happen if this method was outside the @implementation scope of AppDelegate.

    NSLog(@"Processing %d in window %@", i, self->_window);

}

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {

    for (NSInteger i = 0; i < 200; i++) {

        _processData(self, i);

    }

}

NSWindowController

- (id)initWithWindow:(NSWindow *)window

或者使用 - (NSString *)windowNibName

NSWindowController *controller = [[c alloc] init];

    if (_windowControllers == nil) {

        _windowControllers = [NSMutableArray new];

    }

    [_windowControllers addObject:controller];

    [controller showWindow:self];//显示Window,self 为NSWindowController

    [controller release];

注册窗口关闭通知

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_windowClosed:) name:NSWindowWillCloseNotification object:nil];

处理关闭窗口通知，移出不需要的Window

- (void)_windowClosed:(NSNotification *)note {

    NSWindow *window = [note object];

    for (NSWindowController *winController in _windowControllers) {

        if (winController.window == window) {

            [[winController retain] autorelease]; // Keeps the instance alive a little longer so things can unbind from it

            [_windowControllers removeObject:winController];

            break;

        }

    }

}

#pragma mark KVO

- (void)observeValueForKeyPath:(NSString *)keyPath

                      ofObject:(id)object

                        change:(NSDictionary *)change

                       context:(void *)context

{

NSLog(@"dict= %@ obj= %@,keypath=%@",change,object,keyPath);

//    if (object ==xxx) {

//        if ([keyPath isEqualToString:@"title"]) {

//            

//        }else if ([keyPath isEqualToString:@"name"]) {

//            

//        }

//    } else if(object == bbb){

//        

//    }

    if (context == 123) {

    } else if(context == 456){

    }

}

-(void)traceObj:(Entry*)obj

{

[obj addObserver:self

  forKeyPath:@"title"

options:0

context:123];

    [obj addObserver:self

  forKeyPath:@"name"

options:0

context:456];

    [objB addObserver:self

  forKeyPath:@"name"

options:0

context:NULL];

}

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.

-(void)viewDidLoad

{

[super viewDidLoad];

Entry *entry =[[Entry alloc] init];

[self traceObj:entry];

[entry setValue:@"abc" forKey:@"title"];

id msg=[entry valueForKey:@"titl"];

NSLog(@"%@",msg);

[[NSNotificationCenter defaultCenter] addObserver:self 

selector:@selector(keyboardShow:)

name:UIKeyboardWillShowNotification 

  object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self 

selector:@selector(keyboardShow:)

name:UIKeyboardWillHideNotification

  object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self 

selector:@selector(textChanged:)

name:UITextFieldTextDidChangeNotification

  object:nil];

}

-(void)textChanged:(NSNotification*)noti

{

NSLog(@"%@ %@",input.text,[noti userInfo]);

NSString *sTr =input.text;

if ([sTr length] >=10) {

input.text = [sTr substringWithRange:NSMakeRange(0,9)];

UIAlertView *alert=[[[UIAlertView alloc] initWithTitle:@"title" message:@"message" delegate:self cancelButtonTitle:@"ok" otherButtonTitles:@"2",@"cancel",nil] autorelease];

[alert show];

}

NSMutableArray *array=[[NSMutableArray alloc] initWithCapacity:10];

}

-(void)keyboardShow:(NSNotification*)noti

{

if ([[noti name] isEqualToString:UIKeyboardWillShowNotification]) {

input.center = CGPointMake(input.center.x, input.center.y-200);

} else {

input.center = CGPointMake(input.center.x, input.center.y+200);

}

}

######################################

@implementation Entry

@synthesize title;

@synthesize price;

@synthesize image53;

@synthesize image;

-(id)valueForUndefinedKey:(NSString *)key

{

return [NSString stringWithFormat:@"%@ not have value for key %@",self,key];

}

-(void)setValue:(id)value forUndefinedKey:(NSString *)key

{

}

#!/bin/sh

apppath=`xcodebuild |grep Validation|awk '{print $2}'`

sign='iPhone Distribution:Yarshure Kong Healthcare Communications Co., Ltd.'

ipapath=`pwd`'/BlanceBall.ipa'

echo $apppath

/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/PackageApplication  -s "$sign" "$apppath" -o "$ipapath"

scp "$ipapath" macgeeks:~/macgeeks.cn/bbs/apps/

    NSString *path=[[NSBundle mainBundle] pathForResource:@"111.jpg" ofType:nil];

    CIImage *image=[CIImage imageWithData:UIImagePNGRepresentation(imageView.image)];//[CIImage imageWithContentsOfURL:[NSURL fileURLWithPath:path]];

    NSDictionary *pro=[image properties];

    NSLog(@"-- %@",pro);

    CIFilter *filter = [CIFilter filterWithName:@"CIAffineTransform"];//CIBloom

    [filter setDefaults];

    CGAffineTransform a=CGAffineTransformMakeRotation(0.5);

    [filter setValue:[NSValue valueWithCGAffineTransform:a] forKey:@"inputTransform"];

//    [filter setValue:[NSNumber numberWithFloat:0.5] forKey:@"inputRadius"];

    [filter setValue: image forKey: @"inputImage"];

    CIImage *result = [filter valueForKey: @"outputImage"];

    CIContext *context =[CIContext contextWithOptions:nil];

    CGImageRef cgimg=[context createCGImage:result fromRect:[result extent]];

    imageView.image = [UIImage imageWithCGImage:cgimg scale:1.0 orientation:UIImageOrientationUp];

   孔老师你好，那个开源的coverFlow例子，你应该很早就看过，我想问个问题，我们项目里面前段时间用到了这个东西，解决了大多数问题，但还有个问题解决不了。

   我们的项目是在Ipad上面，滑动的图片比较大，在滑动时，如果手指滑动的时间快于动画的时间，连续这样，就会出现图片绘制错位的情况，在模拟器上面不存在这种表况，我估计是跟设备有关系，处理器不够好，不知道这个有没有解决的办法。然后就是在Ipad1上面滑动的流畅度远不如在Ipad2上面的，已经试过一些优化的方法了，不知道有没有什么方法可以让图片滑动更加流畅点。

   谢谢！