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//显示为黑色
if (SYSTEM_VERSION_LESS_THAN(@"7")) {
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackTranslucent animated:NO];
} else {
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault animated:NO];
}
//显示为白色
if (SYSTEM_VERSION_LESS_THAN(@"7")) {
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackOpaque animated:NO];
} else {
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:NO];
}
//判断系统版本
#define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)
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原文地址：http://www.cnblogs.com/yaoxingmeng/p/5661012.html
