Lập trình iPhone part 18

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XLEXQEOI'SGSE8SYGLWMRK-RWLSVX]SYEVIVIEH]XSGLEVX]SYVS[RGSYVWI ;IEVIWSTVSYH7S[LIVIXSRI\X# +IXXMRK9RWXYGO %XMXWGSVITVSKVEQQMRKMWEFSYXTVSFPIQWSPZMRKEFSYXJMKYVMRKXLMRKWSYX -XvWJYRERHMXvWVI[EVHMRKPMOIJI[XLMRKWEVI&YXEXXMQIW]SY[MPPVYRYT EKEMRWXETY^^PIXLEXNYWXWIIQWMRWYVQSYRXEFPIETVSFPIQXLEXNYWXHSIWRSX WIIQXSLEZIEWSPYXMSR 7SQIXMQIWXLIERW[IVNYWXETTIEVWMJ]SYXEOIEFMXSJXMQIE[E]JVSQXLI TVSFPIQ%KSSHRMKLXvWWPIITSVEJI[LSYVWSJHSMRKWSQIXLMRKHMJJIVIRXGER SJXIRFIEPPXLEXMWRIIHIHXSKIX]SYXLVSYKLMX&IPMIZIYW]SYGERWXEVIEX XLIWEQITVSFPIQJSVLSYVWSZIVEREP]^MRKERHKIXXMRK]SYVWIPJWS[SVOIHYT XLEX]SYQMWWERSFZMSYWWSPYXMSR ',%48)6 ;LIVIXS2I\X#  %RHXLIRXLIVIEVIXMQIW[LIRIZIREGLERKISJWGIRIV]HSIWRvXLIPT%RHMRXLSWIWMXYE XMSRWMXvWKSSHXSLEZIJVMIRHWMRLMKLTPEGIW8LIJSPPS[MRKWIGXMSRWSYXPMRIWSQIVIWSYVGIW ]SYGERXYVRXS[LIR]SYvVIMREFMRH %TTPIvW(SGYQIRXEXMSR &IGSQISRI[MXL<GSHIvWHSGYQIRXEXMSRFVS[WIV8LIHSGYQIRXEXMSRFVS[WIVMWEJVSRX IRHXSE[IEPXLSJMRGVIHMFP]ZEPYEFPIWEQTPIWSYVGIGSHIGSRGITXKYMHIW%4-VIJIVIRGIW ZMHISXYXSVMEPWERHE[LSPIPSXQSVI8LIVIEVIJI[EVIEWSJXLIM4LSRIXLEX]SY[SRvXFI EFPIXSPIEVRQSVIEFSYXF]QEOMRK]SYV[E]XLVSYKL%TTPIvWHSGYQIRXEXMSR%RHMJ]SY KIXGSQJSVXEFPI[MXL%TTPIvWHSGYQIRXEXMSRQEOMRK]SYV[E]XLVSYKLYRGLEVXIHXIVVMXS VMIWERHRI[XIGLRSPSKMIWEW%TTPIVSPPWXLIQSYX[MPPFIIEWMIV 238) <GSHIvWHSGYQIRXEXMSRFVS[WIVXEOIW]SYXSXLIWEQIMRJSVQEXMSR]SYGERKIXXSF]KSMRKXS%TTPIvW (IZIPSTIV'SRRIGXMSR[IFWMXIEX LXXTHIZIPSTIVETTPIGSQ  1EMPMRK0MWXW =SYQMKLXEPWS[ERXXSWMKRYTJSVXLIWILERH]QEMPMRKPMWXW LXXTPMWXWETTPIGSQQEMPQERPMWXMRJSGSGSEHIZ 8LMWQSHIVEXIP] LMKLZSPYQIPMWXVYRF]%TTPIMWTVMQEVMP]EFSYX'SGSEJSV1EG37<&IGEYWISJXLI GSQQSRLIVMXEKIWLEVIHF]'SGSEERH'SGSE8SYGLLS[IZIVQER]SJXLITISTPISR XLMWPMWXQE]FIEFPIXSLIPT]SY1EOIWYVIXSWIEVGLXLIPMWXEVGLMZIWFIJSVIEWOMRK]SYV UYIWXMSRXLSYKL LXXTPMWXWETTPIGSQQEMPQERPMWXMRJS\GSHIYWIVW %RSXLIVPMWXQEMRXEMRIH F]%TTPIXLMWSRIMWWTIGMJMGXSUYIWXMSRWERHTVSFPIQWVIPEXIHXS<GSHI LXXTPMWXWETTPIGSQQEMPQERPMWXMRJSUYEVX^HIZ 8LMWMWER%TTPIQEMRXEMRIH QEMPMRKPMWXJSVHMWGYWWMSRSJXLI5YEVX^(ERH'SVI+VETLMGWXIGLRSPSKMIW (MWGYWWMSR*SVYQW 8LIWIHMWGYWWMSRJSVYQWEPPS[]SYXSTSWX]SYVUYIWXMSRWXSE[MHIVERKISJJSVYQVIEHIVW LXXT[[[MTLSRIHIZWHOGSQ 3RXLMW[IFJSVYQM4LSRITVSKVEQQIVWFSXLRI[ ERHI\TIVMIRGIHLIPTIEGLSXLIVSYX[MXLTVSFPIQWERHEHZMGI LXXTHMWGYWWMSRWETTPIGSQGEXIKSV]NWTE#GEXIKSV]-(! 8LMWPMROGSR RIGXW]SYXS%TTPIvWGSQQYRMX]JSVYQWJSV1EGERHM4LSRIWSJX[EVIHIZIPSTIVW ',%48)6 ;LIVIXS2I\X#  LXXTHMWGYWWMSRWETTPIGSQGEXIKSV]NWTE#GEXIKSV]-(! 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27'SHIV2MKLXWEVI[IIOP]SVKERM^IHQIIXMRKW[LIVI 'SGSETVSKVEQQIVWKIXXSKIXLIVXSGSHIERHWSGMEPM^I0MOI'SGSE,IEHWQIIXMRKW 27'SHIV2MKLXWEVIMRHITIRHIRXP]SVKERM^IHPSGEPIZIRXW LXXTGSGSEFPSKWGSQ 8LMWTSVXEPGSRXEMRWPMROWXSEKVIEXQER]FPSKWVIPEXIHXS 'SGSETVSKVEQQMRK LXXT[[[MTLSRIHIZGIRXVEPSVK 8LMW[IFWMXIMWHIZSXIHXSM4LSRITVSKVEQQMRK XYXSVMEPW &PSKW -J]SYWXMPPLEZIRvXJSYRHEWSPYXMSRXS]SYVGSHMRKHMPIQQE]SYQMKLX[ERXXSVIEHXLIWI FPSKW LXXTXLISGEGESGSQ 8LMWFPSKMWQEMRXEMRIHF]7GSXX7XIZIRWSRERI\TIVMIRGIH 'SGSETVSKVEQQIV LXXT[[[[MPWLMTPI]GSQFPSK ;MP7LMTPI]MWSRISJXLIQSWXI\TIVMIRGIH 3FNIGXMZI'TVSKVEQQIVWSRXLITPERIX,MW4MQT1]'SHIWIVMIWSJFPSKTSWXMRKW WLSYPHFIVIUYMVIHVIEHMRKJSVER]3FNIGXMZI'TVSKVEQQIV LXXTVIRX^WGLGSQ ;SPJ6IRX^WGLMWERI\TIVMIRGIHMRHITIRHIRX'SGSETVSKVEQ QIVERHXLIJSYRHIVSJXLI'MRHITIRHIRXHIZIPSTIVWvGSRJIVIRGI ',%48)6 ;LIVIXS2I\X#  LXXTGLERWSRPMZINSYVREPGSQ 'LVMW,ERWSR[SVOWEX%TTPISRXLI<GSHIXIEQ ERHLMWFPSKMWJMPPIH[MXLKVIEXMRWMKLXERHMRJSVQEXMSREFSYX<GSHIERHVIPEXIHXSTMGW %RH-J%PP)PWI*EMPW (VST(EZIERH.IJJERIQEMPEX HEZIERHNIJJ$MTLSRIHIZFSSOGSQ 8LMWMWXLITIVJIGXTPEGI XSWIRHIQEMPWEFSYXX]TSWMRXLIFSSOSVFYKWMRSYVGSHI;IGERvXTVSQMWIXSVIWTSRHXS IZIV]IQEMPFYX[I[MPPVIEHEPPSJXLIQ&IWYVIXSVIEHXLIIVVEXEFIJSVIGPMGOMRKWIRH%RH TPIEWIHS[VMXIERHXIPPYWEFSYXXLIGSSPETTPMGEXMSRW]SYHIZIPST *EVI[IPP ;IWYVIEVIKPEH]SYGEQIEPSRKSRXLMWNSYVRI][MXLYW;I[MWL]SYXLIFIWXSJPYGOERH LSTIXLEX]SYIRNS]TVSKVEQQMRKXLIM4LSRIEWQYGLEW[IHS  7TIGMEP'LEVEGXIVW MQTSVXWXEXIQIRXW TVEKQEHMVIGXMZIWz GLEVEGXIV @GLEVEGXIV IPPMTWMW % EFWXVEGXGPEWW EGGIPIVSQIXIV EGGIWWMRKz SZIVZMI[ TL]WMGWSJz 6SPPMRK1EVFPITVSKVEQz 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