IOS8以上或以下 presentViewController 背景不透明解决办法

IOS8及以上，设置
nextVC.modalPresentationStyle = UIModalPresentationOverCurrentContext;

IOS8以下，设置
self.modalPresentationStyle = UIModalPresentationCurrentContext;

其中 nextVC 是要显示的ViewController, self是当前ViewController。

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全部代码如下：

nextVC.view.backgroundColor = [UIColor clearColor];if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0) {    nextVC.modalPresentationStyle = UIModalPresentationOverCurrentContext;} else {    self.modalPresentationStyle = UIModalPresentationCurrentContext;}[self presentViewController:nextVC animated:YES completion:nil];