tbxml - parse XML

http://istarelworkshop.com/2011/06/17/using_the_tbxml_library


http://stackoverflow.com/questions/5406424/iphone-tbxml-looping-and-parsing-data


http://ntt.cc/2010/09/05/50-open-source-iphone-apps-for-iphone-developers.html

NSString 是 Object C 中常用的類。在這裡，在網路上搜集整理一些關於 NSString 的操作供參考：

• 添加 '＠' 在字串前變成 NSString

NSString \*t = @"test"

• 連接

字串連接有三種方法：

NSString *string1; NSString\* string2;

1. NString *compose = [NSString initWithFormat:@"%@,%@", string1, string2 ];

2. NString *compose = [string1 stringByAppendingString:string2];

3 . NString *compose = [string stringByAppendingFormat:@"%@,%@",string1, string2];

其中 format 的格式為：

'％＠' 是格式化 NSString 類型

%d, %D, %i 是格式化 32位元有符號整數 (int)

具體見參考手冊

• Format (initWithFormat & stringWithFormat)

NSString *string = [[NSString alloc] initWithFormat:@"%@", otherString];

label.text = string;

[string release];  //使用alloc不要忘記release掉!

myStr = [NSString stringWithFormat:@"%@", otherStr2];

• 轉換(從別的型態轉至NSString)

int 到 NSString: [NSString stringWithFormat:@"%d", myInt];

NSInteger 到 NSString: [NSString stringWithFormat:@"%d", [myNSInt intValue]];

• 比對(兩個字串比對)

if ([textField.text isEqualToString: @""]) {

        textField.text = @"0";

    }

不是用 textField.text! == @"";  來比對喔!  complier會過，但執行不理你!

不同button給不同的tag, 可呼叫同一個action。

myBtn1.tag = 1
[myBtn addTarget...];

myBtn2.tag = 2
[myBtn2 addTarget...];

- (void)clickTest:(id)sender
{
     UIButton* btn = sender;
     switch(btn.tag)
     {
          case 1:
               //
               break;
          case 2:
              //
             break;
     }
}

Objective C 如何使用Dictionary

//create the dictionary
NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] init];


//add keyed data
[dictionary setObject:@"Orange" forKey:@"Peggy"];
[dictionary setObject:@"Purple" forKey:@"Landy"];
[dictionary setObject:@"Red" forKey:@"Ula"];


//write out "Orange" to the log
NSLog(@"%@", [dictionary objectForKey:@"Peggy"]);


// values in foreach loop -1
NSLog(@"%@", dictionary );
NSArray *keys = [dictionary allKeys];
for (NSString *key in keys) {
NSLog(@"%@ is %@",key, [dictionary objectForKey:key]);
}

//values in foreach loop -2
for (id theKey in dictionary ) {
id anObject = [[aDictionary objectForKey:theKey] retain];
}

//release the dictionary
[dictionary release];

convert NSString value to NSData

http://stackoverflow.com/questions/901357/nsstring-to-nsdata

(1)

NSString* str= @"teststring";
NSData* data=[str dataUsingEncoding:NSUTF8StringEncoding];

(2)

NSString* myString= @"testing";
NSData* data=[myString dataUsingEncoding: [NSString defaultCStringEncoding] ];

(3)

NSData* data = [yourString dataUsingEncoding:NSUTF8StringEncoding]; 

data = [data subdataWithRange:NSMakeRange(0, [data length] - 1)];