标签：blog io os ar 数据 div on log 代码
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一 ?常见枚举的定义:
typedef enum
{
LOGIN_SUCCESS,
USER_NAME,
USER_PASSWORD,
OLD_LAT,
OLD_LNG
}FIELD_SAVED;
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二?在iOS6和Mac OS 10.8以后Apple引入了两个宏来重新定义这两个枚举类型，实际上是将enum定义和typedef合二为一，并且采用不同的宏来从代码角度来区分。?
typedef NS_ENUM(NSInteger, UIViewAnimationTransition) {
UIViewAnimationTransitionNone,//默认从0开始
UIViewAnimationTransitionFlipFromLeft,
UIViewAnimationTransitionFlipFromRight,
UIViewAnimationTransitionCurlUp,
UIViewAnimationTransitionCurlDown,
};
typedef NS_OPTIONS(NSUInteger, UIViewAutoresizing) {
UIViewAutoresizingNone = 0,
UIViewAutoresizingFlexibleLeftMargin = 1 << 0,
UIViewAutoresizingFlexibleWidth = 1 << 1,
UIViewAutoresizingFlexibleRightMargin = 1 << 2,
UIViewAutoresizingFlexibleTopMargin = 1 << 3,
UIViewAutoresizingFlexibleHeight = 1 << 4,
UIViewAutoresizingFlexibleBottomMargin = 1 << 5
};
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三 枚举经常被用于字符的替换.比如把枚举转化为字符.
? ?枚举转为字符.
-(NSString*) getStringFromField:(FIELD_SAVED)defaultFiled{
switch (defaultFiled) {
case LOGIN_SUCCESS:
return @"login_success";
case USER_NAME:
return @"user_name";
case USER_PASSWORD:
return @"user_pwd";
case OLD_LAT:
return @"lat";
case OLD_LNG:
return @"lng";
default:
return @"default";
}
}
?根据请求后的数据,找相应字符串:
1 首先定义一个全部枚举值的数组.
2 根据请求后的数据,取下标.
3 根据下标,取相应的字符串.
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标签：blog io os ar 数据 div on log 代码
原文地址：http://www.cnblogs.com/xclidongbo/p/4064304.html
