When I import a project that started on Xcode 3 on Xcode 4, it ads another set of entries for the icons on the Info.plist file. Something like this:
当我在Xcode 4上导入一个在Xcode 3上启动的项目时，它会在Info.plist文件中为图标添加另一组条目。像这样的东西：
and some times there is also another entry called "Icon file" (file on the singular, not plural), alone.
有时还有另一个名为“图标文件”的条目（单数形式的文件，而不是复数形式），单独使用。
Are all these entries required?
是否需要所有这些条目？
Another question: why the launch images Default.png and Default@2x.png are added to the icon sections?
另一个问题：为什么将启动图像Default.png和Default@2x.png添加到图标部分？
3 个解决方案
#1
12
You only need the entry Icon files (plural) with all your icons (57x57,72x72,114x114,144x144). You may delete the Icon files (iOS 5) as well as the Icon file (singular).
您只需要带有所有图标的条目图标文件（复数）（57x57,72x72,114x114,144x144）。您可以删除图标文件（iOS 5）以及图标文件（单数）。
The Default.png's in that section is totally wrong and was maybe placed there because of a bug in Xcode.
该部分中的Default.png是完全错误的，可能因为Xcode中的错误而放在那里。
#2
2
Like Jonas said, you can delete the (iOS 5) part.
像Jonas所说，你可以删除（iOS 5）部分。
However, this is clearly a new addition, and most likely Apple is going forward with these changes for a reason.
然而，这显然是一个新的补充，很可能Apple正在推进这些变化是有原因的。
I would clean it up and keep it for forward compatibility.
我会清理它并保持它的向前兼容性。
#3
1
you do not have to specify @2x versions, they will be picked automatically for ipads,dev page here just list 1x versions in items there.
item 0: Icon - it is 57x57
item 1: Icon-72 - it is 72x72
item 2: Icon-Small - it is 29-29
item 3: Icon-Small-50 -it is 50x50
你不必指定@ 2x版本，它们将自动选择为ipads，这里的dev页面只列出项目中的1x版本。项目0：图标 - 它是57x57项目1：图标-72 - 它是72x72项目2：图标 - 小 - 它是29-29项目3：图标 - 小50 -it是50x50
add these files in .png format to your proj as well as @2x so 8 of them all together.
将.png格式的这些文件添加到您的项目以及@ 2x中，以便将它们中的8个一起添加到您的项目中。
add Default.png and its 2x version to proj too and in launch image specify only Default.png
将Default.png及其2x版本添加到proj中，在启动映像中仅指定Default.png
B
乙
#1
12
You only need the entry Icon files (plural) with all your icons (57x57,72x72,114x114,144x144). You may delete the Icon files (iOS 5) as well as the Icon file (singular).
您只需要带有所有图标的条目图标文件（复数）（57x57,72x72,114x114,144x144）。您可以删除图标文件（iOS 5）以及图标文件（单数）。
The Default.png's in that section is totally wrong and was maybe placed there because of a bug in Xcode.
该部分中的Default.png是完全错误的，可能因为Xcode中的错误而放在那里。
#2
2
Like Jonas said, you can delete the (iOS 5) part.
像Jonas所说，你可以删除（iOS 5）部分。
However, this is clearly a new addition, and most likely Apple is going forward with these changes for a reason.
然而，这显然是一个新的补充，很可能Apple正在推进这些变化是有原因的。
I would clean it up and keep it for forward compatibility.
我会清理它并保持它的向前兼容性。
#3
1
you do not have to specify @2x versions, they will be picked automatically for ipads,dev page here just list 1x versions in items there.
item 0: Icon - it is 57x57
item 1: Icon-72 - it is 72x72
item 2: Icon-Small - it is 29-29
item 3: Icon-Small-50 -it is 50x50
你不必指定@ 2x版本，它们将自动选择为ipads，这里的dev页面只列出项目中的1x版本。项目0：图标 - 它是57x57项目1：图标-72 - 它是72x72项目2：图标 - 小 - 它是29-29项目3：图标 - 小50 -it是50x50
add these files in .png format to your proj as well as @2x so 8 of them all together.
将.png格式的这些文件添加到您的项目以及@ 2x中，以便将它们中的8个一起添加到您的项目中。
add Default.png and its 2x version to proj too and in launch image specify only Default.png
将Default.png及其2x版本添加到proj中，在启动映像中仅指定Default.png
B
乙