iAd 무작위로 충돌 함

Question

내 앱에서 임의로이 iAd 크래시가 발생했습니다. 수정하려면 어떻게해야합니까? 나는 시뮬레이터에서 결코 일어나지 않기 때문에 그것을 고칠 어떤 힌트도 보지 못한다.

Incident Identifier: CA4CBEB9-A081-459B-BAAA-C7D58A0E0ABC 
CrashReporter Key: e24b9614a897f92ee13ce00b76c71db307c61dcb 
Hardware Model:  iPod2,1 
Process:   FooApp [737] 
Path:   /var/mobile/Applications/F52C7226-7DA9-464B-939E-322394241900/FooApp.app/FooApp 
Identifier:  FooApp 
Version:   ??? (???) 
Code Type:  ARM (Native) 
Parent Process: launchd [1] 

Date/Time:  2010-07-14 16:42:28.135 +0200 
OS Version:  iPhone OS 4.0 (8A293) 
Report Version: 104 

Exception Type: EXC_BAD_ACCESS (SIGBUS) 
Exception Codes: KERN_PROTECTION_FAILURE at 0x00000000 
Crashed Thread: 0 

Thread 0 Crashed: 
0 libobjc.A.dylib     0x000034f8 objc_msgSend + 24 
1 iAd        0x0000b88c -[ADBannerView _adManagerFailedToLoadBanner:withError:] + 68 
2 iAd        0x0000317c -[ADCache _notifyFailureCount:error:] + 160 
3 iAd        0x00003968 -[ADCache _dispatchResponses] + 332 
4 Foundation      0x000932a4 __NSFireTimer + 136 
5 CoreFoundation     0x00074256 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 10 
6 CoreFoundation     0x00076966 __CFRunLoopDoTimer + 1038 
7 CoreFoundation     0x000773ea __CFRunLoopRun + 1178 
8 CoreFoundation     0x0001e0bc CFRunLoopRunSpecific + 220 
9 CoreFoundation     0x0001dfca CFRunLoopRunInMode + 54 
10 GraphicsServices    0x00003f88 GSEventRunModal + 188 
11 UIKit       0x00007b40 -[UIApplication _run] + 564 
12 UIKit       0x00005fb8 UIApplicationMain + 964 
13 FooApp      0x000023b4 main (main.m:11) 
14 FooApp      0x00002384 start + 32 

Thread 1: 
0 libSystem.B.dylib    0x00034e84 kevent + 24 
1 libSystem.B.dylib    0x00102a48 _dispatch_mgr_invoke + 88 
2 libSystem.B.dylib    0x00102494 _dispatch_queue_invoke + 96 
3 libSystem.B.dylib    0x00102634 _dispatch_worker_thread2 + 120 
4 libSystem.B.dylib    0x0008b53c _pthread_wqthread + 392 
5 libSystem.B.dylib    0x00082b6c start_wqthread + 0 

Thread 2: 
0 libSystem.B.dylib    0x00000ab0 mach_msg_trap + 20 
1 libSystem.B.dylib    0x00002f94 mach_msg + 60 
2 CoreFoundation     0x00074b18 __CFRunLoopServiceMachPort + 88 
3 CoreFoundation     0x000770e0 __CFRunLoopRun + 400 
4 CoreFoundation     0x0001e0bc CFRunLoopRunSpecific + 220 
5 CoreFoundation     0x0001dfca CFRunLoopRunInMode + 54 
6 WebCore       0x0000370c RunWebThread(void*) + 552 
7 libSystem.B.dylib    0x0008af80 _pthread_start + 364 
8 libSystem.B.dylib    0x0007d014 thread_start + 0 

Thread 3: 
0 libSystem.B.dylib    0x00000ab0 mach_msg_trap + 20 
1 libSystem.B.dylib    0x00002f94 mach_msg + 60 
2 CoreFoundation     0x00074b18 __CFRunLoopServiceMachPort + 88 
3 CoreFoundation     0x000770e0 __CFRunLoopRun + 400 
4 CoreFoundation     0x0001e0bc CFRunLoopRunSpecific + 220 
5 CoreFoundation     0x0001dfca CFRunLoopRunInMode + 54 
6 Foundation      0x0003c316 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 210 
7 Foundation      0x0000c612 -[NSThread main] + 42 
8 Foundation      0x00092140 __NSThread__main__ + 908 
9 libSystem.B.dylib    0x0008af80 _pthread_start + 364 
10 libSystem.B.dylib    0x0007d014 thread_start + 0 

Thread 4: 
0 libSystem.B.dylib    0x00029f24 select$DARWIN_EXTSN + 20 
1 CoreFoundation     0x0007aa54 __CFSocketManager + 340 
2 libSystem.B.dylib    0x0008af80 _pthread_start + 364 
3 libSystem.B.dylib    0x0007d014 thread_start + 0 

Thread 5: 
0 libSystem.B.dylib    0x0008c3b4 __workq_kernreturn + 8 
1 libSystem.B.dylib    0x0008b718 _pthread_wqthread + 868 
2 libSystem.B.dylib    0x00082b6c start_wqthread + 0 

Thread 6: 
0 libSystem.B.dylib    0x0008c3b4 __workq_kernreturn + 8 
1 libSystem.B.dylib    0x0008b718 _pthread_wqthread + 868 
2 libSystem.B.dylib    0x00082b6c start_wqthread + 0 

Thread 0 crashed with ARM Thread State: 
    r0: 0x002caa60 r1: 0x3522f69a  r2: 0x002f3f30  r3: 0x05658530 
    r4: 0x002e972f r5: 0x00000000  r6: 0x00000003  r7: 0x2fffe9d0 
    r8: 0x339e2ae4 r9: 0x2fffe91c  r10: 0x3522eede  r11: 0x3522da60 
    ip: 0x3e668294 sp: 0x2fffe9a8  lr: 0x35217894  pc: 0x3523a4f8 
    cpsr: 0x20000010 

Binary Images: 
    0x1000 - 0x76fff +FooApp armv6 <5c2227d78f3ac0b30540b97024b286a9> /var/mobile/Applications/F52C7226-7DA9-464B-939E-322394241900/FooApp.app/FooApp 
    0x674000 - 0x675fff dns.so armv6 <d94bf29d2f94f4cac8fb25d075252bc2> /usr/lib/info/dns.so 
0x2fe00000 - 0x2fe28fff dyld armv6 <a2a8d67606c76b315fd9e97b0b023784> /usr/lib/dyld 
0x30021000 - 0x3007dfff libGLImage.dylib armv6 <4d09042d6dfd3c953a5c35fc9d765c7c> /System/Library/Frameworks/OpenGLES.framework/libGLImage.dylib 
0x3009e000 - 0x301c6fff MusicLibrary armv6 <732057b3867dd3f90e600d1bcd217b2e> /System/Library/PrivateFrameworks/MusicLibrary.framework/MusicLibrary 
0x301c7000 - 0x30364fff AudioToolbox armv6 <7ba1695e186fe8f284ab7f33fcd85d1d> /System/Library/Frameworks/AudioToolbox.framework/AudioToolbox 
0x3041e000 - 0x3043cfff libresolv.9.dylib armv6 <806782dbc2e4e7992c26bf32b4df0674> /usr/lib/libresolv.9.dylib 
0x304f4000 - 0x3055afff libBLAS.dylib armv6 <9222c722e8fa6b004565e9f50fb611c4> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libBLAS.dylib 
0x305a7000 - 0x305b6fff OpenGLES armv6 <5f718500ced9ed538f6d70a20ca9e7b8> /System/Library/Frameworks/OpenGLES.framework/OpenGLES 
0x305b7000 - 0x305f9fff CoreLocation armv6 <f851f4f9645c050445185f901c7d1426> /System/Library/Frameworks/CoreLocation.framework/CoreLocation 
0x30659000 - 0x30692fff MobileCoreServices armv6 <d2cb48d8151eeecaac35f425543ed38f> /System/Library/Frameworks/MobileCoreServices.framework/MobileCoreServices 
0x306f0000 - 0x30733fff CoreTelephony armv6 <0a68cba6be455c7c40ab745a02f731c0> /System/Library/Frameworks/CoreTelephony.framework/CoreTelephony 
0x307b2000 - 0x30810fff CoreAudio armv6 <667e016db146b7b685c2df973b4eb1f2> /System/Library/Frameworks/CoreAudio.framework/CoreAudio 
0x30811000 - 0x30817fff MBX2D armv6 <14a44e9271c3e17812a8ae9b690fbee7> /System/Library/PrivateFrameworks/MBX2D.framework/MBX2D 
0x30836000 - 0x309b9fff CoreGraphics armv6 <8fb72c9419ad2991e3883433a56474bd> /System/Library/Frameworks/CoreGraphics.framework/CoreGraphics 
0x309bf000 - 0x309c7fff IAP armv6 <393e2aa3ac1152c278788bdcdfcb0ae6> /System/Library/PrivateFrameworks/IAP.framework/IAP 
0x30aba000 - 0x30b1cfff libsqlite3.dylib armv6 <b08f7531c40c875a00655f20104bacf5> /usr/lib/libsqlite3.dylib 
0x30b69000 - 0x30b69fff vecLib armv6 <9675978ea23f63d6a50ba3e86b51ca97> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/vecLib 
0x30c82000 - 0x30d66fff QuartzCore armv6 <68467edfafbe46cf156a09f981470c4c> /System/Library/Frameworks/QuartzCore.framework/QuartzCore 
0x30d6f000 - 0x30d8ffff libRIP.A.dylib armv6 <096f09bbc077685818857b1b5b778180> /System/Library/Frameworks/CoreGraphics.framework/Resources/libRIP.A.dylib 
0x30d96000 - 0x30de9fff libvDSP.dylib armv6 <d97bf1093b1a64413eca6974fb0f5504> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libvDSP.dylib 
0x30e09000 - 0x30e0bfff libAccessibility.dylib armv6 <f5ef20a0bd9cba04ebc758fe6a23d3b7> /usr/lib/libAccessibility.dylib 
0x30e0c000 - 0x30e0dfff CoreSurface armv6 <0deb7e43538b2322b1393fef1c5a1590> /System/Library/PrivateFrameworks/CoreSurface.framework/CoreSurface 
0x30e29000 - 0x30f43fff libicucore.A.dylib armv6 <32cb97fab65d624434be808e4d7f7fd5> /usr/lib/libicucore.A.dylib 
0x3115c000 - 0x31160fff ApplePushService armv6 <7f70dc415a34acff93861da7eabb7ba4> /System/Library/PrivateFrameworks/ApplePushService.framework/ApplePushService 
0x31162000 - 0x3152ffff libLAPACK.dylib armv6 <9ed24071d90c47c237b42c77a5475efe> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libLAPACK.dylib 
0x315a8000 - 0x315a9fff liblangid.dylib armv6 <8f97ab552c7d6e16f592115d7477245a> /usr/lib/liblangid.dylib 
0x315ae000 - 0x31666fff ImageIO armv6 <00456ab6f056e5cc09947c1583de18bf> /System/Library/Frameworks/ImageIO.framework/ImageIO 
0x3168c000 - 0x3168ffff CrashReporterSupport armv6 <45ad3a409dd6e9d3e7281b05a3819bc0> /System/Library/PrivateFrameworks/CrashReporterSupport.framework/CrashReporterSupport 
0x31759000 - 0x31765fff SpringBoardServices armv6 <acb852df8b8425700f2642c183362b71> /System/Library/PrivateFrameworks/SpringBoardServices.framework/SpringBoardServices 
0x31766000 - 0x3176afff libMobileGestalt.dylib armv6 <0049a3d14c57b4a1ea8d520fab571a92> /usr/lib/libMobileGestalt.dylib 
0x3176b000 - 0x3176dfff IOMobileFramebuffer armv6 <f5356b424bc55d44d4151852098336c9> /System/Library/PrivateFrameworks/IOMobileFramebuffer.framework/IOMobileFramebuffer 
0x317d5000 - 0x3190efff libSystem.B.dylib armv6 <eba90ac7da57bb6cf062d3a6e74b852e> /usr/lib/libSystem.B.dylib 
0x3193c000 - 0x31a10fff WebKit armv6 <3cb517d6a799c4722ace6679f2e85a6d> /System/Library/PrivateFrameworks/WebKit.framework/WebKit 
0x31a2b000 - 0x31a3bfff DataDetectorsUI armv6 <c51cf579ae0d04d140e0714df48b6bae> /System/Library/PrivateFrameworks/DataDetectorsUI.framework/DataDetectorsUI 
0x31a58000 - 0x31c99fff ProtocolBuffer armv6 <16f68d9ce4e4e5bc18b35148d68c369a> /System/Library/PrivateFrameworks/ProtocolBuffer.framework/ProtocolBuffer 
0x31e3a000 - 0x31e3efff IOSurface armv6 <604ec9514f70a84f18a4c020b723ec57> /System/Library/PrivateFrameworks/IOSurface.framework/IOSurface 
0x31e3f000 - 0x31f04fff Celestial armv6 <d67abb27b59e69b05a98322b340e24d1> /System/Library/PrivateFrameworks/Celestial.framework/Celestial 
0x31f3c000 - 0x31f47fff libbz2.1.0.dylib armv6 <ce0a82849bba4a1285bbccf145c02a35> /usr/lib/libbz2.1.0.dylib 
0x31f86000 - 0x31f91fff ITSync armv6 <61f4bfaae86f26d0ff9a30d3fe6eff5f> /System/Library/PrivateFrameworks/ITSync.framework/ITSync 
0x31f93000 - 0x31f9dfff MobileWiFi armv6 <597094bba2fbd7ee1976bd5f38d93f4c> /System/Library/PrivateFrameworks/MobileWiFi.framework/MobileWiFi 
0x31f9e000 - 0x31fdefff ManagedConfiguration armv6 <4c318efb9d60754af1f1ba5eee715880> /System/Library/PrivateFrameworks/ManagedConfiguration.framework/ManagedConfiguration 
0x31ffe000 - 0x3200afff DataDetectorsCore armv6 <0fb4f9f876e49398b15f1350155a0912> /System/Library/PrivateFrameworks/DataDetectorsCore.framework/DataDetectorsCore 
0x3200b000 - 0x3201cfff PersistentConnection armv6 <ac2e94cd758efc73f8b4e9c298eac9d1> /System/Library/PrivateFrameworks/PersistentConnection.framework/PersistentConnection 
0x3216a000 - 0x321b9fff Security armv6 <b36cf795531d1d9e7be364e10d7ed90d> /System/Library/Frameworks/Security.framework/Security 
0x32233000 - 0x32285fff IOKit armv6 <861fd5d810381967e6a4d8c504fddc65> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit 
0x3235c000 - 0x33a75fff UIKit armv6 <6b1e7386ccb9170130465dd66e320a58> /System/Library/Frameworks/UIKit.framework/UIKit 
0x33a76000 - 0x33a8afff libmis.dylib armv6 <d6b74e95f265c651ba519adbd525ab59> /usr/lib/libmis.dylib 
0x33c07000 - 0x33c48fff VideoToolbox armv6 <f599cd31636fd804c2cc820435577f5d> /System/Library/PrivateFrameworks/VideoToolbox.framework/VideoToolbox 
0x33c49000 - 0x33c57fff GraphicsServices armv6 <336ba68fec36155d87dcd5cc93cb69a5> /System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices 
0x341e7000 - 0x34207fff RawCamera armv6 <0d564a0ceaead3ed2c2ca062e6e86a9b> /System/Library/CoreServices/RawCamera.bundle/RawCamera 
0x34209000 - 0x34239fff AppSupport armv6 <fe42b18413be339f6f39abcc94c98a66> /System/Library/PrivateFrameworks/AppSupport.framework/AppSupport 
0x342b2000 - 0x342b9fff liblockdown.dylib armv6 <e4d8805a067c32759705c7f750ae22d5> /usr/lib/liblockdown.dylib 
0x342ba000 - 0x342c0fff MobileKeyBag armv6 <b416e34658bd7794c3bfecefcec15827> /System/Library/PrivateFrameworks/MobileKeyBag.framework/MobileKeyBag 
0x342d7000 - 0x34342fff libstdc++.6.dylib armv6 <c621f921d71ecad04aa90512945460f5> /usr/lib/libstdc++.6.dylib 
0x34387000 - 0x34447fff MediaPlayer armv6 <f56333ca810d4782f7952c0b56b329ae> /System/Library/Frameworks/MediaPlayer.framework/MediaPlayer 
0x34448000 - 0x34449fff DataMigration armv6 <e172aff91163993f5487457a8a7fc481> /System/Library/PrivateFrameworks/DataMigration.framework/DataMigration 
0x3445f000 - 0x34555fff libxml2.2.dylib armv6 <fe03fd73746bb5d1a66283f88af99085> /usr/lib/libxml2.2.dylib 
0x34556000 - 0x3455bfff libGFXShared.dylib armv6 <1fba30d031fdd1d3580a19d0e757f82a> /System/Library/Frameworks/OpenGLES.framework/libGFXShared.dylib 
0x3455e000 - 0x34566fff WebUI armv6 <e02113f7b9eac918971ea0679e8d0e37> /System/Library/PrivateFrameworks/WebUI.framework/WebUI 
0x3456e000 - 0x34573fff AssetsLibraryServices armv6 <82ebe32a298d9a3e2ff42c1fc4ed164b> /System/Library/PrivateFrameworks/AssetsLibraryServices.framework/AssetsLibraryServices 
0x345a8000 - 0x345b1fff AccountSettings armv6 <4933996569c9e94593eece3c59c83b38> /System/Library/PrivateFrameworks/AccountSettings.framework/AccountSettings 
0x345db000 - 0x345e3fff libgcc_s.1.dylib armv6 <480b2ebb3645728b3ddea392718b06f4> /usr/lib/libgcc_s.1.dylib 
0x345f1000 - 0x345f5fff libgermantok.dylib armv6 <118d3d5c40a44d2bc6540579b946f215> /usr/lib/libgermantok.dylib 
0x34638000 - 0x3463bfff ArtworkCache armv6 <094874c28571b2a61958a12d7ac1c909> /System/Library/PrivateFrameworks/ArtworkCache.framework/ArtworkCache 
0x346c4000 - 0x347e5fff Foundation armv6 <f332f35e00567975fd242ed36417e32e> /System/Library/Frameworks/Foundation.framework/Foundation 
0x347e9000 - 0x3498efff MediaToolbox armv6 <7abebed58aafad2637353798796827d3> /System/Library/PrivateFrameworks/MediaToolbox.framework/MediaToolbox 
0x349c6000 - 0x349d8fff libbsm.0.dylib armv6 <890d82cf86a38274a40c7435941825b0> /usr/lib/libbsm.0.dylib 
0x34a2d000 - 0x34a80fff CoreMedia armv6 <791607fdea84db935ec2983b646fd6ae> /System/Library/Frameworks/CoreMedia.framework/CoreMedia 
0x34c47000 - 0x34c89fff AddressBook armv6 <8cdfdb51dfc5859a49e4e62f6f423458> /System/Library/Frameworks/AddressBook.framework/AddressBook 
0x34d57000 - 0x34e5cfff CoreData armv6 <17e10ccdd964bbceebc95ffcb9ad5d5e> /System/Library/Frameworks/CoreData.framework/CoreData 
0x34e5d000 - 0x34f6dfff CFNetwork armv6 <1f59b619ceea0eaf7ba9ec3729c136d4> /System/Library/Frameworks/CFNetwork.framework/CFNetwork 
0x350c0000 - 0x35105fff CoreText armv6 <ccd1c0b6e03bff58b013f9ef494f0ef8> /System/Library/Frameworks/CoreText.framework/CoreText 
0x3510b000 - 0x3512afff Bom armv6 <9f17f2fdf0e7efd5740ff1d8637fc0b6> /System/Library/PrivateFrameworks/Bom.framework/Bom 
0x35172000 - 0x35191fff EAP8021X armv6 <d0c2bd846c2334cd5c9e801a9f466ca8> /System/Library/PrivateFrameworks/EAP8021X.framework/EAP8021X 
0x35192000 - 0x35195fff MobileInstallation armv6 <d2dc5be30f11631cc7b90e48cff0f4e7> /System/Library/PrivateFrameworks/MobileInstallation.framework/MobileInstallation 
0x35196000 - 0x3519afff CertUI armv6 <dc80eb049f3baf955c238589529ab8ff> /System/Library/PrivateFrameworks/CertUI.framework/CertUI 
0x3519b000 - 0x351a7fff libkxld.dylib armv6 <564dcfd62a1a5430ec02feacf6334825> /usr/lib/system/libkxld.dylib 
0x351a8000 - 0x351b6fff libz.1.dylib armv6 <712df47cb008c407ea7b3615d078cfc6> /usr/lib/libz.1.dylib 
0x3520c000 - 0x35233fff iAd armv6 <9fd2305c151fe217c680bb5d92731eec> /System/Library/Frameworks/iAd.framework/iAd 
0x35237000 - 0x352ddfff libobjc.A.dylib armv6 <b55da671f23d1580dc031236c03ca977> /usr/lib/libobjc.A.dylib 
0x352e0000 - 0x352edfff MobileBluetooth armv6 <294e5422ae7533dd6c64fb5fef3b86e8> /System/Library/PrivateFrameworks/MobileBluetooth.framework/MobileBluetooth 
0x35348000 - 0x353e6fff ProofReader armv6 <adaf06c1f87b025b35995394f3cf9c2a> /System/Library/PrivateFrameworks/ProofReader.framework/ProofReader 
0x355bb000 - 0x355bbfff Accelerate armv6 <19360395982776b4e38e5a28acda450b> /System/Library/Frameworks/Accelerate.framework/Accelerate 
0x355bc000 - 0x35719fff libGLProgrammability.dylib armv6 <e13b0847531b60aebfdb276c1eb5623a> /System/Library/Frameworks/OpenGLES.framework/libGLProgrammability.dylib 
0x357e8000 - 0x358d1fff JavaScriptCore armv6 <2c206f26fee7b7a93004b9f4e82b504b> /System/Library/PrivateFrameworks/JavaScriptCore.framework/JavaScriptCore 
0x35966000 - 0x3615dfff WebCore armv6 <d2d1696c608f72e1451e7fe640ff840a> /System/Library/PrivateFrameworks/WebCore.framework/WebCore 
0x362ab000 - 0x362e6fff libCGFreetype.A.dylib armv6 <51e05cea58bdf27356c29658b5b93e6d> /System/Library/Frameworks/CoreGraphics.framework/Resources/libCGFreetype.A.dylib 
0x363a0000 - 0x36477fff CoreFoundation armv6 <0ae5fe97433e816615033fbe19e5cf6e> /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation 
0x36478000 - 0x36484fff CoreVideo armv6 <639962081f133b863b43981e3214c1e9> /System/Library/Frameworks/CoreVideo.framework/CoreVideo 
0x36485000 - 0x364c7fff SystemConfiguration armv6 <9f8575eaec0d1428fe23a40f2f7dd2c5> /System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration 
0x36503000 - 0x36563fff GMM armv6 <8f383b3fb65b1dd4e9e46d6de455ff29> /System/Library/PrivateFrameworks/GMM.framework/GMM 
0x365c4000 - 0x36600fff QuickLook armv6 <d4e3461fd4185a86315ce004e0562382> /System/Library/Frameworks/QuickLook.framework/QuickLook 

Answer 1

기본보기의 dealloc에서 대리인을 nil로 설정했는지 확인하십시오.

- (void)dealloc 
{ 
banner.delegate = nil; 
[banner release]; 
[super dealloc]; 
} 

Answer 2

모든 iAd 속성을 올바르게 전달했는지 확인하십시오. 나는 같은 문제를 가졌지 만, didFailToReceiveAdWithError 메소드를 구현하여 모든 것을 고쳤습니다.

- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError 
*)error { if (bannerIsVisible) 
    { 
     [UIView beginAnimations:@"animateAdBannerOff" context:NULL];  // assumes the banner view is at the bottom of the screen. 
     banner.frame = CGRectOffset(banner.frame, 0, 50); // if the banner is on top of the screen use -50 
     [UIView commitAnimations]; 
     bannerIsVisible = NO; 
    } }