说明： iphone自定义的淡入淡出的panel效果...
(iphone custom fade in and out of the panel results ...)
文件列表：
PopupPanel
..........\.DS_Store,6148,2011-05-29
..........\Classes
..........\.......\PopupPanelAppDelegate.h,478,2011-03-19
..........\.......\PopupPanelAppDelegate.m,685,2011-03-19
..........\.......\PopupPanelView.h,423,2011-03-20
..........\.......\PopupPanelView.m,2559,2011-03-20
..........\.......\RootViewController.h,439,2011-03-20
..........\.......\RootViewController.m,2265,2011-03-20
..........\main.m,359,2011-03-19
..........\MainWindow.xib,8034,2011-03-19
..........\PopupPanel-Info.plist,909,2011-03-19
..........\PopupPanel.xcodeproj
..........\....................\project.pbxproj,11677,2011-05-29
..........\....................\rytong.mode1v3,39764,2011-05-29
..........\....................\rytong.pbxuser,2431,2011-05-29
..........\....................\xuyunan.mode1v3,46130,2011-03-20
..........\....................\xuyunan.pbxuser,44702,2011-03-20
..........\PopupPanel_Prefix.pch,189,2011-03-19
__MACOSX
........\._PopupPanel,229,2011-05-29
........\PopupPanel
........\..........\._.DS_Store,82,2011-05-29
........\..........\._Classes,229,2011-03-20
........\..........\._main.m,229,2011-03-19
........\..........\._MainWindow.xib,229,2011-03-19
........\..........\._PopupPanel-Info.plist,229,2011-03-19
........\..........\._PopupPanel_Prefix.pch,229,2011-03-19
........\..........\Classes
........\..........\.......\._PopupPanelAppDelegate.h,229,2011-03-19
........\..........\.......\._PopupPanelAppDelegate.m,229,2011-03-19
........\..........\.......\._PopupPanelView.h,229,2011-03-20
........\..........\.......\._PopupPanelView.m,229,2011-03-20
........\..........\.......\._RootViewController.h,229,2011-03-20
........\..........\.......\._RootViewController.m,229,2011-03-20
........\..........\PopupPanel.xcodeproj
........\..........\....................\._xuyunan.mode1v3,229,2011-03-20
........\..........\....................\._xuyunan.pbxuser,229,2011-03-20
