Copy_N_Paste

parsing HTML on the iPhone

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[上午 10:17:04] _RTN 神奇傑克:  object-c的html parser 這裡有解答 http://stackoverflow.com/questions/405749/parsing-html-on-the-iphone

libxml2.2 comes in the SDK, and libxml/HTMLparser.h claims the following:

    This module implements an HTML 4.0 non-verifying parser with API compatible with the XML parser ones. It should be able to parse "real world" HTML, even if severely broken from a specification point of view.

[MEMO/TIPS] iPhone class / method / instance naming convention

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class  : 大寫開頭

method / instance : 小寫

Property List / SQLite 寫法 sample

類似 printf 的寫法

NSString *debugMsg = [NSString stringWithFormat:@"Process %d", 1];

取亂數

定義:
#define RANDOM_SEED() srandom(time(NULL))
#define RANDOM_INT(__MIN__, __MAX__) ((__MIN__) + random() % ((__MAX__+1) - (__MIN__)))

// --- 這樣用
    NSLog(@"%d" , RANDOM_INT(0,9) );

取 unixtime :

    NSDate *past = [NSDate date];
    NSTimeInterval oldTime = [past timeIntervalSinceDate:[NSDate dateWithNaturalLanguageString:@"01/01/1970"]];
    NSString *unixTime = [[NSString alloc] initWithFormat:@"%0.0f", oldTime];
    NSLog(@"%@" , unixTime);

印出 debug message / popup alert 的寫法:

// ---
-(void) printdebug:(id)msg {
	NSLog(@"%@", msg);
}

// ---
-(void) displayAlertMessage:(id)msg {
	// Display AlertView
	UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"___Alert___" message:msg
                        delegate:self cancelButtonTitle:@"Close" otherButtonTitles: nil];
	[alert show];
	[alert release];
}

Objective-C 奇怪的 null detect!

	if ( (NSNull *)[item objectForKey:@"nick"]==[NSNull null] ) {
		// FOR GUEST DATA
		cell.textLabel.text = @"Guest";
	} else {
		// FOR MEMBER DATA
		cell.textLabel.text = [item objectForKey:@"nick"];
	}

ASYNC network 寫法:

http://mobile.tutsplus.com/tutorials/iphone/iphone-json-twitter-api/

—-

[URL] iPhone programming bookmarks / reference

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★ Your First iOS Application
http://developer.apple.com/iphone/library/documentation/iPhone/Conceptual/iPhone101/Articles/00_Introduction.html

中文 :  http://icodeblog.com/category/iphone-programming-tutorials/

★★ iOS Reference Library : http://developer.apple.com/iphone/library/navigation/index.html

iPhone Dev Center : http://developer.apple.com/iphone/index.action

Using iPhone Simulator

iPhone Human Interface Guidelines :  http://developer.apple.com/iphone/library/documentation/UserExperience/Conceptual/MobileHIG/Introduction/Introduction.html

objective-c 的基本認識 , 參考 URL :  http://www.otierney.net/objective-c.html.zh-tw.big5

有趣的 iPad iPhone development video 教學 : http://www.rorylewis.com/docs/02_iPad_iPhone/05_iPhoneTutorials.htm

給初接觸 objective-c 的介紹 : http://maciku.blogspot.com/2009/12/iphone-objective-c.html

包裝好給 iPhone 用的 http 元件/framework – ASIHTTPRequest
http://allseeing-i.com/ASIHTTPRequest/

—-

7/31 iPhone dev 課程 outline :

iPhone spec. / Objective-c intro.

intro. xcode / iPhone 開發限制 / 應用軟體架構 / 記憶體管理

first App. – HelloWorld

程式語法 – simple

Interface Builder基本操作

字串與資料結構 / UI Catalog

second App. – Location base App.

upload to real iPhone – use Apple

★ init , copy , retain 要記得 release memory

★ didReceiveMemoryWarning , viewDidUnload 暫時釋放 memmory

★ IBOutlet 引用到的 InterfaceBuilder 元件建議作 release , 但要注意到不要重覆 release

★ InterfaceBuilder : 事件與程式碼配合 – IBAction , 物件關聯 – IBOutlet , Delegate 指定.

A simple Objective-C Method Declaration and Definition

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定義

- (void) sayHello: (NSString*) name;

implementation :

- (void) sayHello: (NSString*) name {
  NSMutableString *message = [[NSMutableString alloc] initWithString:@"Hello there "];
  [message appendString:name];
  NSLog(message);
  [message release];
}
//

simple.m 宣告 sayHello method:

#import "Simple.h"
@implementation Simple
- (void) sayHello: (NSString *) name {
  NSMutableString *message = [[NSMutableString alloc] initWithString:@"Hello there "];
  [message appendString:name];
  NSLog(message);
  [message release];
}
@end
//

simple.h

#import 
@interface Simple : NSObject {
}
-(void) sayHello: (NSString *) name;
@end
//

main 呼叫 sayHello method:

#import 
#import "Simple.h"
int main(int argc, char *argv[]) {
  NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
  Simple * mySimple = [[Simple alloc] init];
  [mySimple sayHello:@"James"];
  [mySimple release];
  int retVal = UIApplicationMain(argc, argv, nil, nil);
  [pool release];
  return retVal;
}
//

objective-c-intreface

iphone / hello world 2 / single rows in the table view

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// --
// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return 1;
}


// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    }

    [cell.textLabel setText:@"Hello World!"];
    return cell;
}
// --
// --