iOS NSDictionary的Category

前言

项目中自己通过各种渠道及结合项目的经验整理了一套自己的工具包，里面有各种Category，及封装的方法，方便项目使用，这段时间我会陆续分享出来，希望能帮助到有需求的人Y^oY 。

NSDictionary+LSCore.h

//
//  NSDictionary+LSCore.h
//  LSCoreFramework
//
//  Created by 王隆帅 on 15/5/4.
//  Copyright (c) 2015年 王隆帅. All rights reserved.
//
#import <Foundation/Foundation.h>

@interface NSDictionary (LSCore)

#pragma mark - 安全操作
- (BOOL)hasKey:(NSString *)key;

- (NSString*)stringForKey:(id)key;
- (NSNumber*)numberForKey:(id)key;
- (NSArray*)arrayForKey:(id)key;
- (NSDictionary*)dictionaryForKey:(id)key;
- (NSInteger)integerForKey:(id)key;
- (NSUInteger)unsignedIntegerForKey:(id)key;
- (BOOL)boolForKey:(id)key;

- (int16_t)int16ForKey:(id)key;
- (int32_t)int32ForKey:(id)key;
- (int64_t)int64ForKey:(id)key;

- (char)charForKey:(id)key;
- (short)shortForKey:(id)key;
- (float)floatForKey:(id)key;
- (double)doubleForKey:(id)key;
- (long long)longLongForKey:(id)key;
- (unsigned long long)unsignedLongLongForKey:(id)key;

- (CGFloat)CGFloatForKey:(id)key;
- (CGPoint)pointForKey:(id)key;
- (CGSize)sizeForKey:(id)key;
- (CGRect)rectForKey:(id)key;

#pragma mark - 合并
+ (NSDictionary *)dictionaryByMerging:(NSDictionary *)dict1 with:(NSDictionary *)dict2;
- (NSDictionary *)dictionaryByMergingWith:(NSDictionary *)dict;

#pragma mark - json
-(NSString *)JSONString;

NSDictionary+LSCore.m

//
//  NSDictionary+LSCore.m
//  LSCoreFramework
//
//  Created by 王隆帅 on 15/5/4.
//  Copyright (c) 2015年 王隆帅. All rights reserved.
//

#import "NSDictionary+LSCore.h"

@implementation NSDictionary (LSCore)

#pragma mark - safeAccess
/**
 *  判断字典对于给定Key是否有内容
 *
 *  @param key 给定的Key
 *
 *  @return YES 存在 NO 不存在
 */
- (BOOL)hasKey:(NSString *)key {
    return [self objectForKey:key] != nil;
}

/**
 *  获取字符串
 *
 *  @param key 给定的key
 *
 *  @return 获得的字符串
 */
- (NSString*)stringForKey:(id)key {
    id value = [self objectForKey:key];
    if (value == nil || value == [NSNull null])
    {
        return @"";
    }
    if ([value isKindOfClass:[NSString class]]) {
        return (NSString*)value;
    }
    if ([value isKindOfClass:[NSNumber class]]) {
        return [value stringValue];
    }
    
    return nil;
}

/**
 *  获取number
 *
 *  @param key 给定的key
 *
 *  @return 获得的number
 */
- (NSNumber*)numberForKey:(id)key {
    id value = [self objectForKey:key];
    if ([value isKindOfClass:[NSNumber class]]) {
        return (NSNumber*)value;
    }
    if ([value isKindOfClass:[NSString class]]) {
        NSNumberFormatter * f = [[NSNumberFormatter alloc] init];
        [f setNumberStyle:NSNumberFormatterDecimalStyle];
        return [f numberFromString:(NSString*)value];
    }
    return nil;
}

/**
 *  获取array
 *
 *  @param key 给定的key
 *
 *  @return 获得的array
 */
- (NSArray*)arrayForKey:(id)key {
    id value = [self objectForKey:key];
    if (value == nil || value == [NSNull null])
    {
        return nil;
    }
    if ([value isKindOfClass:[NSArray class]])
    {
        return value;
    }
    return nil;
}

/**
 *  获取dictionary
 *
 *  @param key 给定的key
 *
 *  @return 获得的dictionary
 */
- (NSDictionary*)dictionaryForKey:(id)key {
    id value = [self objectForKey:key];
    if (value == nil || value == [NSNull null])
    {
        return nil;
    }
    if ([value isKindOfClass:[NSDictionary class]])
    {
        return value;
    }
    return nil;
}

/**
 *  获取initeger
 *
 *  @param key 给定的key
 *
 *  @return 获得的integer
 */
- (NSInteger)integerForKey:(id)key {
    id value = [self objectForKey:key];
    if (value == nil || value == [NSNull null])
    {
        return 0;
    }
    if ([value isKindOfClass:[NSString class]] || [value isKindOfClass:[NSNumber class]])
    {
        return [value integerValue];
    }
    return 0;
}

/**
 *  获取unsignedInteger
 *
 *  @param key 给定的key
 *
 *  @return 获得的unsignedInteger
 */
- (NSUInteger)unsignedIntegerForKey:(id)key {
    id value = [self objectForKey:key];
    if (value == nil || value == [NSNull null])
    {
        return 0;
    }
    if ([value isKindOfClass:[NSString class]] || [value isKindOfClass:[NSNumber class]])
    {
        return [value unsignedIntegerValue];
    }
    return 0;
}

/**
 *  获取bool
 *
 *  @param key 给定的key
 *
 *  @return 获得的bool
 */
- (BOOL)boolForKey:(id)key {
    id value = [self objectForKey:key];
    
    if (value == nil || value == [NSNull null])
    {
        return NO;
    }
    if ([value isKindOfClass:[NSNumber class]])
    {
        return [value boolValue];
    }
    if ([value isKindOfClass:[NSString class]])
    {
        return [value boolValue];
    }
    return NO;
}

/**
 *  获取int16
 *
 *  @param key 给定的key
 *
 *  @return 获得的int16
 */
- (int16_t)int16ForKey:(id)key {
    id value = [self objectForKey:key];
    
    if (value == nil || value == [NSNull null])
    {
        return 0;
    }
    if ([value isKindOfClass:[NSNumber class]])
    {
        return [value shortValue];
    }
    if ([value isKindOfClass:[NSString class]])
    {
        return [value intValue];
    }
    return 0;
}

/**
 *  获取int32
 *
 *  @param key 给定的key
 *
 *  @return 获得的int32
 */
- (int32_t)int32ForKey:(id)key {
    id value = [self objectForKey:key];
    
    if (value == nil || value == [NSNull null])
    {
        return 0;
    }
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]])
    {
        return [value intValue];
    }
    return 0;
}

/**
 *  获取int64
 *
 *  @param key 给定的key
 *
 *  @return 获得的int64
 */
- (int64_t)int64ForKey:(id)key {
    id value = [self objectForKey:key];
    
    if (value == nil || value == [NSNull null])
    {
        return 0;
    }
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]])
    {
        return [value longLongValue];
    }
    return 0;
}

/**
 *  获取char
 *
 *  @param key 给定的key
 *
 *  @return 获得的char
 */
- (char)charForKey:(id)key {
    id value = [self objectForKey:key];
    
    if (value == nil || value == [NSNull null])
    {
        return 0;
    }
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]])
    {
        return [value charValue];
    }
    return 0;
}

/**
 *  获取short
 *
 *  @param key 给定的key
 *
 *  @return 获得的short
 */
- (short)shortForKey:(id)key {
    id value = [self objectForKey:key];
    
    if (value == nil || value == [NSNull null])
    {
        return 0;
    }
    if ([value isKindOfClass:[NSNumber class]])
    {
        return [value shortValue];
    }
    if ([value isKindOfClass:[NSString class]])
    {
        return [value intValue];
    }
    return 0;
}

/**
 *  获取float
 *
 *  @param key 给定的key
 *
 *  @return 获得的float
 */
- (float)floatForKey:(id)key {
    id value = [self objectForKey:key];
    
    if (value == nil || value == [NSNull null])
    {
        return 0;
    }
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]])
    {
        return [value floatValue];
    }
    return 0;
}

/**
 *  获取double
 *
 *  @param key 给定的key
 *
 *  @return 获得的double
 */
- (double)doubleForKey:(id)key {
    id value = [self objectForKey:key];
    
    if (value == nil || value == [NSNull null])
    {
        return 0;
    }
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]])
    {
        return [value doubleValue];
    }
    return 0;
}

/**
 *  获取longLong
 *
 *  @param key 给定的key
 *
 *  @return 获得的longLong
 */
- (long long)longLongForKey:(id)key {
    id value = [self objectForKey:key];
    if ([value isKindOfClass:[NSString class]] || [value isKindOfClass:[NSNumber class]]) {
        return [value longLongValue];
    }
    return 0;
}

/**
 *  获取unsignedLongLong
 *
 *  @param key 给定的key
 *
 *  @return 获得的unsignedLongLong
 */
- (unsigned long long)unsignedLongLongForKey:(id)key {
    id value = [self objectForKey:key];
    if ([value isKindOfClass:[NSString class]]) {
        NSNumberFormatter *nf = [[NSNumberFormatter alloc] init];
        value = [nf numberFromString:value];
    }
    if ([value isKindOfClass:[NSNumber class]]) {
        return [value unsignedLongLongValue];
    }
    return 0;
}

/**
 *  获取CGFloat
 *
 *  @param key 给定的key
 *
 *  @return 获得的CGFloat
 */
- (CGFloat)CGFloatForKey:(id)key {
    CGFloat f = [self[key] doubleValue];
    return f;
}

/**
 *  获取point
 *
 *  @param key 给定的key
 *
 *  @return 获得的point
 */
- (CGPoint)pointForKey:(id)key {
    CGPoint point = CGPointFromString(self[key]);
    return point;
}

/**
 *  获取size
 *
 *  @param key 给定的key
 *
 *  @return 获得的size
 */
- (CGSize)sizeForKey:(id)key {
    CGSize size = CGSizeFromString(self[key]);
    return size;
}

/**
 *  获取rect
 *
 *  @param key 给定的key
 *
 *  @return 获得的rect
 */
- (CGRect)rectForKey:(id)key {
    CGRect rect = CGRectFromString(self[key]);
    return rect;
}

#pragma mark - 合并
/**
 *  合并两个字典
 *
 *  @param dict1 第一个字典
 *  @param dict2 第二个字典
 *
 *  @return 合并之后得到的字典
 */
+ (NSDictionary *)dictionaryByMerging:(NSDictionary *)dict1 with:(NSDictionary *)dict2 {
    NSMutableDictionary * result = [NSMutableDictionary dictionaryWithDictionary:dict1];
    [dict2 enumerateKeysAndObjectsUsingBlock: ^(id key, id obj, BOOL *stop) {
        if (![dict1 objectForKey:key]) {
            if ([obj isKindOfClass:[NSDictionary class]]) {
                NSDictionary * newVal = [[dict1 objectForKey: key] dictionaryByMergingWith: (NSDictionary *) obj];
                [result setObject: newVal forKey: key];
            } else {
                [result setObject: obj forKey: key];
            }
        }
    }];
    return (NSDictionary *) [result mutableCopy];
}
/**
 *  与另一个字典合并
 *
 *  @param dict 将要合并过来的字典
 *
 *  @return 合并后的字典
 */
- (NSDictionary *)dictionaryByMergingWith:(NSDictionary *)dict {
    return [[self class] dictionaryByMerging:self with: dict];
}

#pragma mark - json
-(NSString *)JSONString {
    NSError *error = nil;
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:self
                                                       options:NSJSONWritingPrettyPrinted
                                                         error:&error];
    if (jsonData == nil) {
#ifdef DEBUG
        NSLog(@"fail to get JSON from dictionary: %@, error: %@", self, error);
#endif
        return nil;
    }
    NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    return jsonString;
}