目录1.示例一2.示例二（更详细）2.1判断Map是否为null2.2判断Map是否为空2.3综合判断Map是否为null或空3.示例三3.1例子1：检查Map是否为null或空，并输出相应的信息3.2例子2：在方法中安全地处理可能为null的Map1.示
I\'ve got a modal view controller that is being displayed using UIModalPresentationFullScreen with the TransitionStyle set 开发者_JAVA百科as UIModalTransitionStylePartialCurl.This works beautifully.
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