iPhone各尺寸下的分辨率

iPhone  3.5英寸的：Any of the following sizes:

• 640 x 920 pixels for hi-res portrait (without status bar) minimum
• 640 x 960 pixels for hi-res portrait (full screen) maximum
• 960 x 600 pixels for hi-res landscape (without status bar) minimum
• 960 x 640 pixels for hi-res landscape (full screen) maximum

iPhone  4英寸的：Any of the following sizes:

• 640 x 1096 pixels for portrait (without status bar) minimum
• 640 x 1136 pixels for portrait (full screen) maximum
• 1136 x 600 pixels for landscape (without status bar) minimum
• 1136 x 640 pixels for landscape (full screen) minimum

iPhone  4.7英寸的： 

• 750 x 1334 pixels for hi-res portrait
• 1334 x 750 pixels for hi-res landscape

iPhone  5.5英寸的：

• 1242 x 2208 pixels for hi-res portrait
• 2208 x 1242 pixels for hi-res landscape

iPad

• 1024 x 748 pixels for landscape (without status bar) minimum
• 1024 x 768 pixels for landscape (full screen) maximum
• 2048 x 1496 pixels for hi-res (without status bar) minimum
• 2048 x 1536 pixels for hi-res landscape (full screen) maximum
• 768 x 1004 pixels for portrait (without status bar) minimum
• 768 x 1024 pixels for portrait (full screen) maximum
• 1536 x 2008 pixels for hi-res portrait (without status bar) minimum
• 1536 x 2048 pixels for hi-res portrait (full screen) maximum