self.navigationController.navigationBar.barTintColor = [UIColor whiteCol...

// 創(chuàng)建布局對象 UICollectionViewFlowLayout *flowLayout = [[UICollectionViewF...

@interface ViewController () #define w self.view.frame.size.width// 屏幕寬度...

#import "ViewController.h" #import "WeatherViewController.h" @interface ...