This generally means that another instance of this process was already running or is hung in the debugger

今天在測式時　crash之後
再編譯時就一直出現Error

This generally means that another instance of this process was already running or is hung in the debugger

實體機上沒有看到在跑任何程式丫～

但就是重編不了～

最後是裝置關機重開才行～

iOS設備內存硬體

	設備	CPU	螢幕顯示	內存
	1代	412MHz	480X320	128MB
	iPhone3G	412MHz	480X320	128MB
	iPod Touch	532MHz	480X320	128MB
	iPhone3GS	600MHz	480X320	256MB
	iPad	1GHz	1024X768	256MB
	iPhone4	1GHz	960X640	512MB
	ipad2	1GHz 雙核心 Apple A5	1024X768	512MB

如果要寫iphone程式，最好以128MB內存來思考，而且還要扣iOS系統佔用的
除非放棄iPhone3G、iPod Touch ~
而iPad程式呢～就要以256MB來思考，沒錯～iPad1的畫面比較大
，但可用就的內存就是比iPhone4來的少～～～～冏～～

真機調試 Received memory warning. Level= …

OSMemoryNotification.h

typedef enum {
OSMemoryNotificationLevelAny = -1,
OSMemoryNotificationLevelNormal = 0,
OSMemoryNotificationLevelWarning = 1,
OSMemoryNotificationLevelUrgent = 2,
OSMemoryNotificationLevelCritical = 3
} OSMemoryNotificationLevel;



How the levels are triggered is not documented. SpringBoard is configured to do the following in each memory level:

1.Warning (not-normal) — Relaunch, or delay auto relaunch of nonessential background apps e.g. Mail.
2.Urgent — Quit all background apps, e.g. Safari and iPod.
3.Critical and beyond — The kernel will take over, probably killing SpringBoard or even reboot.
4.Killing the active app (jetsam) is not handled by SpringBoard, but launchd.


參考文章

在cocos2d呢
1 .Received memory warning. Level= 1
會觸發 [[CCDirector sharedDirector] purgeCachedData];

- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application {
[[CCDirector sharedDirector] purgeCachedData];
}


此時會把目前沒用到的 材質釋放掉~~
~
理論上ios系統會把不必要的背景程式關掉~


遇到這個情形呢~ 先查查leak吧
如果都沒有~就就就就…砍需求or改需求or改code~~~
減少在同一畫面下的內存使用量了


2 .Received memory warning. Level= 2


目前遇到的都crash 掉了~

還是乖乖查leak …





其他的還沒遇過~哈

內存管理筆記

retainCount 是 objective-c  內存管理的唯一依據.  release 後自動  retainCount 減 1 ，  到 0 時  對象 的dealloc 會被觸發。

     所以永遠不該呼叫 對象的 dealloc 方法

 

1，alloc, allocWithZone,new(帶初始化)
   為對象分配內存，retainCount為“1”，並返回此實例
2，release
   retainCount 減“1”，減到“0”時調用此對象的dealloc方法
3，retain
   retainCount 加“1”
4，copy,mutableCopy
   複製一個實例，retainCount數為“1”，返回此實例。所得到的對像是與其它上下文無關的，獨立的對象(乾淨對象)。
5，autorelease
   在當前上下​​文的AutoreleasePool棧頂的autoreleasePool實例添加此對象，由於它的引入使Objective-C（非GC管理環境）由全手動內存管理上升到半自動化。

詳細參考文章:參考文章

CCLayer CCFadeOut unrecognized selector sent to instance !!~~~~

//目前使用的是 cocos2d 2.0 rc2 版
//
//在CCLayer 淡出效果時
[self runAction:[CCFadeOut actionWithDuration:0.8f]];
//會出現
[classXX setOpacity:]: unrecognized selector sent to instance 0xXXXXXXX !!

似呼有被回呼某 selector
所以必順實做 setOpacity 讓他變更

// Set the opacity of all of our children that support it
-(void) setOpacity: (GLubyte) opacity
{
for( CCNode *node in [self children] )
{
if( [node conformsToProtocol:@protocol( CCRGBAProtocol)] )
{
[(id) node setOpacity: opacity];
}
}
}


限定只有某CCLayer 觸發 touch

網路上片斷 +試驗
原理還沒詳細研究~先記錄囉~

//================================================================
-(void) registerWithTouchDispatcher
{
[[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:INT_MIN+1 swallowsTouches:YES];
}
- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{

return YES;
}



NSMutableArray sort NSString , NSNumber

//內容都是nsstring的
//


NSLog(@"**************************************************");
//內容都是nsstring的
NSMutableArray *arrData = [NSMutableArray new];
[arrData addObject:@"A4"];
[arrData addObject:@"A2"];
[arrData addObject:@"a2"];
[arrData addObject:@"A2"];
[arrData addObject:@"A1"];

NSLog(@"------------- original:");
for (id obj in arrData) NSLog(@"arrData:%@", obj);

NSLog(@"------------- sorted:");
NSArray * sortedData =
[arrData sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
for (id obj in sortedData) NSLog(@"sortedData:%@", obj);
NSLog(@"------------- sorted:");
NSArray * sortedData2 =
[arrData sortedArrayUsingSelector:@selector(localizedCompare:)];
for (id obj in sortedData2) NSLog(@"sortedData2:%@", obj);

output:
2011-07-02 11:38:29.906 testCode[449:207] **************************************************
2011-07-02 11:38:29.907 testCode[449:207] ------------- original:
2011-07-02 11:38:29.908 testCode[449:207] arrData:A4
2011-07-02 11:38:29.908 testCode[449:207] arrData:A2
2011-07-02 11:38:29.908 testCode[449:207] arrData:a2
2011-07-02 11:38:29.909 testCode[449:207] arrData:A2
2011-07-02 11:38:29.909 testCode[449:207] arrData:A1
2011-07-02 11:38:29.910 testCode[449:207] ------------- sorted:
2011-07-02 11:38:29.910 testCode[449:207] sortedData:A1
2011-07-02 11:38:29.911 testCode[449:207] sortedData:A2
2011-07-02 11:38:29.911 testCode[449:207] sortedData:a2
2011-07-02 11:38:29.911 testCode[449:207] sortedData:A2
2011-07-02 11:38:29.911 testCode[449:207] sortedData:A4
2011-07-02 11:38:29.912 testCode[449:207] ------------- sorted:
2011-07-02 11:38:29.914 testCode[449:207] sortedData2:A1
2011-07-02 11:38:29.914 testCode[449:207] sortedData2:a2
2011-07-02 11:38:29.915 testCode[449:207] sortedData2:A2
2011-07-02 11:38:29.915 testCode[449:207] sortedData2:A2
2011-07-02 11:38:29.915 testCode[449:207] sortedData2:A4



//內容都是NSNumber的

NSLog(@"**************************************************");
//內容都是NSNumber的
NSMutableArray *arrNum = [NSMutableArray new];
[arrNum addObject:[[NSNumber alloc] initWithInt:5]];
[arrNum addObject:[[NSNumber alloc] initWithInt:1]];
[arrNum addObject:[[NSNumber alloc] initWithInt:3]];
[arrNum addObject:[[NSNumber alloc] initWithInt:2]];
NSLog(@"------------- original:");
for (id obj in arrNum) NSLog(@"arrNum:%@", obj);
NSLog(@"------------- sorted:");
NSArray * sortedNum = [arrNum sortedArrayUsingSelector:@selector(compare:)];
for (id obj in sortedNum) NSLog(@"sortedNum:%@", obj);



output:
2011-07-02 11:38:29.915 testCode[449:207] **************************************************
2011-07-02 11:38:29.929 testCode[449:207] ------------- original:
2011-07-02 11:38:29.929 testCode[449:207] arrNum:5
2011-07-02 11:38:29.930 testCode[449:207] arrNum:1
2011-07-02 11:38:29.930 testCode[449:207] arrNum:3
2011-07-02 11:38:29.930 testCode[449:207] arrNum:2
2011-07-02 11:38:29.931 testCode[449:207] ------------- sorted:
2011-07-02 11:38:29.931 testCode[449:207] sortedNum:1
2011-07-02 11:38:29.931 testCode[449:207] sortedNum:2
2011-07-02 11:38:29.931 testCode[449:207] sortedNum:3
2011-07-02 11:38:29.932 testCode[449:207] sortedNum:5