Struct 在iOS中的集合中使用

迁移自开源中国

// 定义结构体
struct NoteGroup {
    CGRect rect;
    int page;
};
typedef struct NoteGroup NoteGroup;

// 存入集合
NoteGroup noteGroup = {rect, 3};
[array addObject:[NSValue valueWithBytes:&noteGroup objCType:@encode(NoteGroup)]];

// 取出
NoteGroup noteGroup;
NSValue *noteGroupValue = array[index];
[noteGroupValue getValue:&noteGroup];