iphone 5 圖片命名方案

#define isPhone568 ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone && [UIScreen mainScreen].bounds.size.height == 568)

#define iPhone568ImageNamed(image) (isPhone568 ? [NSString stringWithFormat:@"%@-568h.%@", [image stringByDeletingPathExtension], [image pathExtension]] : image)

#define iPhone568Image(image) ([UIImage imageNamed:iPhone568ImageNamed(image)])

from http://stackoverflow.com/questions/12519110/what-to-name-images-for-iphone-5-screen-size

之後 iphone 5 用的圖片設定 xxx-568h@2x.xxx 即可

僅限 coding, IB 端並不適用（某些設計師請別再以為用滑鼠拉一拉就可以換所有圖了..這並不是 word..，就跟你們畫圖時用的工具不是小畫家一樣