iOS状态栏设置以及设置圆角

//状态栏相关设置，默认的黑色（UIStatusBarStyleDefault）白色（UIStatusBarStyleLightContent）
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
self.navigationController.navigationBar.tintColor = [UIColor redColor];

//设置圆角和圆角边框宽度
userhead.layer.masksToBounds = YES;
userhead.layer.cornerRadius = 6.0;
userhead.layer.borderWidth = 1.0;
userhead.layer.borderColor = [[UIColor whiteColor] CGColor];
mapv.layer.borderWidth = 2.0f;