What image resolution can/should be used for the icon.png file for an iPhone app? I know the size is 57 x 57 but what about the resolution?
图像分辨率可以/应该用于图标。一个iPhone应用的png文件?我知道尺寸是57×57，但是分辨率是多少?
10 个解决方案
#1
26
Resolution only matters when you are trying to match the size of an image across multiple devices (print, screen, etc)
只有当您试图跨多个设备(打印、屏幕等)匹配图像的大小时，分辨率才重要。
App icons are always 57x57 and will display without any scaling thus resolution doesn't matter (you could save it as 72dpi, 65535dpi or missing the dpi metadata entirely--SpringBoard won't care and will draw it the same in all three cases)
应用程序图标通常是57x57，并且不会显示任何缩放，因此分辨率并不重要(您可以将其保存为72dpi、65535dpi或完全忽略dpi元数据——SpringBoard不会在意，在所有三种情况下都将其绘制为相同的)
#2
15
Check these links
检查这些链接
- Creating Custom Icons and Images for iPhones
- 为iphone创建自定义图标和图像。
- iPhone Human Interface Guidelines
- iPhone人机界面指南
#3
4
Here is the link to Apple guidelines, with the sizes for iPad, iPhone retina, etc:
以下是苹果指南的链接，包括iPad、iPhone视网膜等尺寸:
https://developer.apple.com/library/ios/documentation/userexperience/conceptual/mobilehig/AppIcons.html / / apple_ref / doc / uid / TP40006556-CH19-SW1
The "resolution" matters, but don't confuse "resolution" with dpi. Dpi is a measure used for printing, it means "dots per inch". It works like this: if you have an image of 100 x 100 saved at 100dpi, it will measure on paper exactly 1 inch (100 pixels per inch).
“决议”很重要，但不要将“决议”与dpi混淆。Dpi是一种用于打印的度量，它的意思是“每英寸点”。它的工作原理是这样的:如果你有100 x 100的图像保存在100dpi，它将在纸上精确地测量1英寸(每英寸100像素)。
The dpi for the icons doesn't really matter, as they are intended for screen display only, not for printing.
图标的dpi并不重要，因为它们只用于屏幕显示，而不是用于打印。
It is customary to save images as 72dpi - the so called "screen resolution", because the old 14'' monitors (remember those?) could only display a maximum of 72 pixels per every inch of screen. This is no longer true, especially for the "retina" display of the iPhone. It has a much denser screen resolution, it can show much more pixels in a single inch than the older models of the iPhone. This is why you have to save 2 icons: one for retina display at 114 x 114 pixels, and another for the older iPhones, at 57 x 57. Again, the dpi doesn't matter, because whatever dpi you choose, the number of pixels on your image does not change: it would always have exactly 12,996 pixels (114 x 144).
通常将图像保存为72dpi——所谓的“屏幕分辨率”，因为旧的14英寸显示器(还记得吗?)每英寸屏幕最多只能显示72个像素。这已不再是事实，尤其是在iPhone的“视网膜”显示屏上。它的屏幕分辨率要高得多，在一英寸内就能显示出比老款iPhone更多的像素。这就是为什么你必须保存2个图标:一个是retina显示屏，像素为114 x 114，另一个是老款iphone，像素为57 x 57。同样，dpi也不重要，因为无论您选择哪个dpi，图像上的像素数都不会改变:它总是恰好有12996个像素(114 x 144)。
#4
3
I have had the best luck submitting to the App Store with 72dip, 57x57 icons.
我很幸运地用72dip 57x57图标提交给了应用商店。
#5
3
I only want to say that the DPI (or resolution) is a value that only makes sense when an image is printed. The DPI acronym stands for Dots Per Inch, and it only tells the printer to draw that specific number of pixels by inch of paper. While working on screen devices, the DPI isn't important at all.
我只想说，DPI(或分辨率)是一个只有在打印图像时才有意义的值。DPI的缩写代表每英寸的点，它只告诉打印机按每英寸的纸张绘制特定数量的像素。在使用屏幕设备时，DPI根本不重要。
#6
1
If creating new images for the iPhone work with the image size in pixels i.e. 57 x 57 for icons. If you work with image sizes set in millimetres or inches, you'll find that 10mm on your monitor equates to only 4.4mm on the iPhone. The iPhone resolution is 163ppi which is over twice (2.25) the 72dpi resolution of a normal monitor. There is another good reason for the question, in that you may need to provide larger images for marketing (websites, blogs, banner ads, or even printed material) requiring zoomed in images that remain super sharp. In these general wider use cases I prefer to work at 300 dpi at the largest target size and then resize/resample image and resolution when done.
如果为iPhone创建新图像，图像大小以像素为单位，也就是57 x 57的图标。如果你使用的图像大小设置为毫米或英寸，你会发现你显示器上的10毫米在iPhone上只等于4.4毫米。iPhone的分辨率是163ppi，是普通显示器72dpi的两倍多(2.25)。这个问题还有另一个很好的原因，你可能需要提供更大的图片来进行营销(网站、博客、横幅广告，甚至是印刷材料)，这些图片需要放大才能保持超级清晰。在这些更广泛的用例中，我更喜欢在最大目标大小为300 dpi的情况下工作，然后在完成时调整/重新采样图像的大小和分辨率。
#7
1
57 x 57 and Apple takes care of the rest. Apple suggests that you have larger, more detailed graphics for, in the event, that your app gets selected as a feature app.
剩下的由苹果公司负责。苹果公司建议，如果你的应用被选为功能应用，你会有更大、更详细的图形。
#8
1
The iPhone 3GS and prior display is 163dpi, so if you intend to create icons that are of a particular size relative to how they are shown, that should give you enough information. Note that the icon must be 57x57 pixels to be shown at that dpi.
iPhone 3GS和先前的显示是163dpi，所以如果你想要创建一个特定大小的图标，相对于它们的显示方式，这应该会给你足够的信息。注意，图标必须是57x57像素，显示在dpi上。
The iPhone 4 and later and the fourth generation iPod touch and later have 326 dpi displays, and the icon must be 114x114 dpi to be shown at that dpi.
iPhone 4和后来的第四代iPod touch以及后来的326 dpi显示屏，图标必须是114x114 dpi才能显示在dpi上。
#9
1
57x57, as said.
57 x57说。
You can chosse by code if let Apple to add the "shiny effect" or if you'll do (or not) it by yourself
如果让苹果添加“闪亮效果”，或者你自己添加(或不添加)，你可以通过代码进行选择
#10
0
See Apple's Technical Q&A QA1686. There you will find all informations you are looking for.
参见苹果公司的技术问答。在那里你会找到你正在寻找的所有信息。
#1
26
Resolution only matters when you are trying to match the size of an image across multiple devices (print, screen, etc)
只有当您试图跨多个设备(打印、屏幕等)匹配图像的大小时，分辨率才重要。
App icons are always 57x57 and will display without any scaling thus resolution doesn't matter (you could save it as 72dpi, 65535dpi or missing the dpi metadata entirely--SpringBoard won't care and will draw it the same in all three cases)
应用程序图标通常是57x57，并且不会显示任何缩放，因此分辨率并不重要(您可以将其保存为72dpi、65535dpi或完全忽略dpi元数据——SpringBoard不会在意，在所有三种情况下都将其绘制为相同的)
#2
15
Check these links
检查这些链接
- Creating Custom Icons and Images for iPhones
- 为iphone创建自定义图标和图像。
- iPhone Human Interface Guidelines
- iPhone人机界面指南
#3
4
Here is the link to Apple guidelines, with the sizes for iPad, iPhone retina, etc:
以下是苹果指南的链接，包括iPad、iPhone视网膜等尺寸:
https://developer.apple.com/library/ios/documentation/userexperience/conceptual/mobilehig/AppIcons.html / / apple_ref / doc / uid / TP40006556-CH19-SW1
The "resolution" matters, but don't confuse "resolution" with dpi. Dpi is a measure used for printing, it means "dots per inch". It works like this: if you have an image of 100 x 100 saved at 100dpi, it will measure on paper exactly 1 inch (100 pixels per inch).
“决议”很重要，但不要将“决议”与dpi混淆。Dpi是一种用于打印的度量，它的意思是“每英寸点”。它的工作原理是这样的:如果你有100 x 100的图像保存在100dpi，它将在纸上精确地测量1英寸(每英寸100像素)。
The dpi for the icons doesn't really matter, as they are intended for screen display only, not for printing.
图标的dpi并不重要，因为它们只用于屏幕显示，而不是用于打印。
It is customary to save images as 72dpi - the so called "screen resolution", because the old 14'' monitors (remember those?) could only display a maximum of 72 pixels per every inch of screen. This is no longer true, especially for the "retina" display of the iPhone. It has a much denser screen resolution, it can show much more pixels in a single inch than the older models of the iPhone. This is why you have to save 2 icons: one for retina display at 114 x 114 pixels, and another for the older iPhones, at 57 x 57. Again, the dpi doesn't matter, because whatever dpi you choose, the number of pixels on your image does not change: it would always have exactly 12,996 pixels (114 x 144).
通常将图像保存为72dpi——所谓的“屏幕分辨率”，因为旧的14英寸显示器(还记得吗?)每英寸屏幕最多只能显示72个像素。这已不再是事实，尤其是在iPhone的“视网膜”显示屏上。它的屏幕分辨率要高得多，在一英寸内就能显示出比老款iPhone更多的像素。这就是为什么你必须保存2个图标:一个是retina显示屏，像素为114 x 114，另一个是老款iphone，像素为57 x 57。同样，dpi也不重要，因为无论您选择哪个dpi，图像上的像素数都不会改变:它总是恰好有12996个像素(114 x 144)。
#4
3
I have had the best luck submitting to the App Store with 72dip, 57x57 icons.
我很幸运地用72dip 57x57图标提交给了应用商店。
#5
3
I only want to say that the DPI (or resolution) is a value that only makes sense when an image is printed. The DPI acronym stands for Dots Per Inch, and it only tells the printer to draw that specific number of pixels by inch of paper. While working on screen devices, the DPI isn't important at all.
我只想说，DPI(或分辨率)是一个只有在打印图像时才有意义的值。DPI的缩写代表每英寸的点，它只告诉打印机按每英寸的纸张绘制特定数量的像素。在使用屏幕设备时，DPI根本不重要。
#6
1
If creating new images for the iPhone work with the image size in pixels i.e. 57 x 57 for icons. If you work with image sizes set in millimetres or inches, you'll find that 10mm on your monitor equates to only 4.4mm on the iPhone. The iPhone resolution is 163ppi which is over twice (2.25) the 72dpi resolution of a normal monitor. There is another good reason for the question, in that you may need to provide larger images for marketing (websites, blogs, banner ads, or even printed material) requiring zoomed in images that remain super sharp. In these general wider use cases I prefer to work at 300 dpi at the largest target size and then resize/resample image and resolution when done.
如果为iPhone创建新图像，图像大小以像素为单位，也就是57 x 57的图标。如果你使用的图像大小设置为毫米或英寸，你会发现你显示器上的10毫米在iPhone上只等于4.4毫米。iPhone的分辨率是163ppi，是普通显示器72dpi的两倍多(2.25)。这个问题还有另一个很好的原因，你可能需要提供更大的图片来进行营销(网站、博客、横幅广告，甚至是印刷材料)，这些图片需要放大才能保持超级清晰。在这些更广泛的用例中，我更喜欢在最大目标大小为300 dpi的情况下工作，然后在完成时调整/重新采样图像的大小和分辨率。
#7
1
57 x 57 and Apple takes care of the rest. Apple suggests that you have larger, more detailed graphics for, in the event, that your app gets selected as a feature app.
剩下的由苹果公司负责。苹果公司建议，如果你的应用被选为功能应用，你会有更大、更详细的图形。
#8
1
The iPhone 3GS and prior display is 163dpi, so if you intend to create icons that are of a particular size relative to how they are shown, that should give you enough information. Note that the icon must be 57x57 pixels to be shown at that dpi.
iPhone 3GS和先前的显示是163dpi，所以如果你想要创建一个特定大小的图标，相对于它们的显示方式，这应该会给你足够的信息。注意，图标必须是57x57像素，显示在dpi上。
The iPhone 4 and later and the fourth generation iPod touch and later have 326 dpi displays, and the icon must be 114x114 dpi to be shown at that dpi.
iPhone 4和后来的第四代iPod touch以及后来的326 dpi显示屏，图标必须是114x114 dpi才能显示在dpi上。
#9
1
57x57, as said.
57 x57说。
You can chosse by code if let Apple to add the "shiny effect" or if you'll do (or not) it by yourself
如果让苹果添加“闪亮效果”，或者你自己添加(或不添加)，你可以通过代码进行选择
#10
0
See Apple's Technical Q&A QA1686. There you will find all informations you are looking for.
参见苹果公司的技术问答。在那里你会找到你正在寻找的所有信息。