iOS7中修改StatusBar的显示颜色

//
//  RootViewController.m
//  statusBar
//
//  Copyright (c) 2014年 Y.X. All rights reserved.
//

#import "RootViewController.h"

@interface RootViewController ()

@end

@implementation RootViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];
    
    // 4秒钟之后改变状态
    [self performSelector:@selector(delayRun)
               withObject:nil
               afterDelay:4.f];
}

- (void)delayRun
{
    // 动画改变背景色
    [UIView animateWithDuration:1 animations:^{
        self.view.backgroundColor = [UIColor blackColor];
    }];
    
    /*
     可以选择的参数
     
     UIStatusBarStyleLightContent
     UIStatusBarStyleDefault
     */
    // 动画改变StatusBar显示颜色
    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent
                                                animated:YES];
}

@end