Retina (3.5/4 inch Screen) or Non-Retina 判断
if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) {
if ([[UIScreen mainScreen] scale] == 2.0) {
if([UIScreen mainScreen].bounds.size.height == 568){
// iPhone retina-4 inch
} else{
// iPhone retina-3.5 inch
}
}
else {
// not retina display
}
iOS6/iOS7 判断
NSString *ver = [[UIDevice currentDevice] systemVersion];
float ver_float = [ver floatValue];
if (ver_float >= 7.0)
{
//iOS >=7
}
else{
//iOS <7
}