NSArray(FWSafeType)

@interface NSArray<__covariant ObjectType> (FWSafeType)

/**
 安全获取对象
 
 @param index 索引
 @return 对象
 */
- (nullable ObjectType)fw_objectAtIndex:(NSInteger)index NS_REFINED_FOR_SWIFT;

/**
 安全获取子数组
 
 @param range 范围
 @return 对象数组
 */
- (nullable NSArray<ObjectType> *)fw_subarrayWithRange:(NSRange)range NS_REFINED_FOR_SWIFT;

@end

Undocumented

  • 安全获取对象

    Declaration

    Objective-C

    - (nullable ObjectType)fw_objectAtIndex:(NSInteger)index;

    Parameters

    index

    索引

    Return Value

    对象

  • 安全获取子数组

    Declaration

    Objective-C

    - (nullable NSArray<ObjectType> *)fw_subarrayWithRange:(NSRange)range;

    Parameters

    range

    范围

    Return Value

    对象数组

NSArray+FWFoundation

  • 过滤数组元素，返回YES的obj重新组装成一个数组

    Declaration

    Objective-C

    - (nonnull NSArray<ObjectType> *)fw_filterWithBlock:
    (nonnull BOOL (^)(ObjectType _Nonnull __strong))block;

  • 映射数组元素，返回的obj重新组装成一个数组

    Declaration

    Objective-C

    - (nonnull NSArray *)fw_mapWithBlock:
    (nonnull id _Nullable (^)(ObjectType _Nonnull __strong))block;

  • 匹配数组第一个元素，返回满足条件的第一个obj

    Declaration

    Objective-C

    - (nullable ObjectType)fw_matchWithBlock:
    (nonnull BOOL (^)(ObjectType _Nonnull __strong))block;

  • 从数组中随机取出对象，如@[@“a”, @“b”, @“c”]随机取出@“b”

    Declaration

    Objective-C

    @property (nonatomic, readonly, nullable) ObjectType fw_randomObject;

  • 从数组中按照权重随机取出对象，如@[@“a”, @“b”, @“c”]按照@[@0, @8, @02]大概率取出@“b"，不会取出@"a”

    Declaration

    Objective-C

    - (nullable ObjectType)fw_randomObject:(nonnull NSArray *)weights;