rakkang

// 方法一：
/*
1: NSAttributedString 的每个部分都要至少设置两个属性: 

    NSFontAttributeName
    NSForegroundColorAttributeName

2: NSStringDrawingOptions 的值, 在多行的情况下, 至少要有   

    NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading

rakkang

// UIImageView 圆形效果
imgView.layer.cornerRadius    = 24;   // 圆角半径
imgView.layer.masksToBounds   = YES;  // 剪裁 View

rakkang

// 避免 block 循环引用

__weak id <JumpActionDelegate> soft_delegate = _jumpDelegate;
mCategoryAdapter.onCategoryItemClick = ^(NSString *category_id) {
    [soft_delegate jumpToCategoryList:category_id];
};

rakkang

// 在 Info.plist 中添加以下代码

<dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
</dict>

rakkang

// 先做一张全通道全透明的图片1*1的像素就行，取名nav_bar_bg.png
// 作为UINavigationBar的背景色，然后讲barStyle设置成通道就可以了。

[self.navigationBar setBackgroundImage:[UIImage imageNamed:@"nav_bar_bg.png"] 
                         forBarMetrics:UIBarMetricsDefault];
self.navigationBar.barStyle = UIBarStyleBlackTranslucent;

// 去掉 UINavigationBar 底部 1px 的边线
[self.navigationBar setShadowImage:[UIImage new]];

rakkang

 /**
  * 获取当前系统亮度
  **/
 public int getGlobalScrennBrightness(Context context) {
     int nowBrightnessValue = -1;
     ContentResolver resolver = context.getContentResolver();
     try {
         nowBrightnessValue = android.provider.Settings.System.getInt(resolver,
                                                            Settings.System.SCREEN_BRIGHTNESS);
     } catch (Exception e) {