真的好久好久沒(méi)寫(xiě)點(diǎn)東西了食茎，先對(duì)這段時(shí)間的總結(jié)吧。
首先對(duì)技術(shù)的熱忱從未消減，但是總是什么都想學(xué)芬失，什么都是半途而廢楣黍，比如python,H5都是自學(xué)一段時(shí)間后 就沒(méi)有繼續(xù)下去，這是病得治棱烂。
再說(shuō)說(shuō)鍛煉吧租漂，最近有一個(gè)很有成就感的就是 學(xué)會(huì)的蛙泳，從剛開(kāi)始的各種喝水到現(xiàn)在游輕松游200米不是問(wèn)題垢啼，最近又開(kāi)始解鎖自由泳窜锯。。芭析。
發(fā)現(xiàn)一個(gè)很有有趣的東西锚扎，學(xué)游泳和學(xué)技術(shù)有很多相似的地方，比如說(shuō)：剛開(kāi)始的時(shí)候馁启，覺(jué)得很興奮驾孔，啥都要都要嘗試下，然后就不在意 腿部動(dòng)作惯疙，不在意腿部動(dòng)作翠勉，不在意手的動(dòng)作，不在意呼吸節(jié)奏霉颠，然后就各種喝水嗆水对碌，等自己會(huì)游一點(diǎn)了就很有成就感，就想游的標(biāo)準(zhǔn)蒿偎，游的更遠(yuǎn)朽们。學(xué)技術(shù),學(xué)新的語(yǔ)言也是一樣的。剛開(kāi)始很興奮诉位，然后就渾淪吞棗骑脱，結(jié)果處處碰壁，到沮喪苍糠，到學(xué)到一點(diǎn)東西就有點(diǎn)成就感的過(guò)程真的和游泳很像叁丧。
好了回歸正題。
看到這個(gè)標(biāo)題差不多就有點(diǎn)感覺(jué) 這次和大家分享的東西岳瞭。沒(méi)錯(cuò)就是一個(gè)常用并且現(xiàn)在網(wǎng)上很多類似的框架拥娄，如：MJExtension , YYModel,Mantle等等 字典轉(zhuǎn)模型框架。
接下來(lái)瞳筏，我會(huì)說(shuō)下我的JFModel的實(shí)現(xiàn)過(guò)程稚瘾，和用法。
實(shí)現(xiàn)過(guò)程：
首先我們看下數(shù)據(jù)結(jié)構(gòu) User.h 這是一個(gè)
用戶模型
typedef enum {
SexMale,
SexFemale
} Sex;
@interface User : NSObject
@property(nonatomic,copy)NSString *name;
@property(nonatomic,copy)NSString *icon;
@property(nonatomic,copy)NSString *age;
@property(nonatomic,copy)NSString *height;
@property(nonatomic,copy)NSString *money;
@property(nonatomic,copy)NSString *sex;
@property(nonatomic,copy)NSString *gay;
@end
字典
NSDictionary *dict = @{
@"name" : @"linjianfang",
@"icon" : @"jf.png",
@"age" : @"20",
@"height" : @1.75,
@"money" : @"1000009.9999",
@"sex" : @(SexFemale),
@"gay" : @"true",
};
我們想要的結(jié)果如下：
NSLog(@"name=%@, icon=%@, age=%zd, height=%@, money=%@, sex=%d, gay=%d", user.name, user.icon, user.age, user.height, user.money, user.sex, user.gay);
好乏矾，我們先明確是目的孟抗，用模型里面的屬性名做key去字典里面找出對(duì)應(yīng)的value，用模型的屬性的類型將值轉(zhuǎn)為正確的類型钻心。
因?yàn)槟Ｐ痛蠖嗲闆r下都是純凈的都是繼承NSobject的 所以我們就建一個(gè)NSobject的分類
/**
* Describes the properties declared by a class.
*
* @param cls The class you want to inspect.
* @param outCount On return, contains the length of the returned array.
* If \e outCount is \c NULL, the length is not returned.
*
* @return An array of pointers of type \c objc_property_t describing the properties
* declared by the class. Any properties declared by superclasses are not included.
* The array contains \c *outCount pointers followed by a \c NULL terminator. You must free the array with \c free().
*
* If \e cls declares no properties, or \e cls is \c Nil, returns \c NULL and \c *outCount is \c 0.
*/
OBJC_EXPORT objc_property_t *class_copyPropertyList(Class cls, unsigned int *outCount)
OBJC_AVAILABLE(10.5, 2.0, 9.0, 1.0);
Putting these together, you can print a list of all the properties associated with a class using the following code:
我們打印出來(lái)這個(gè)user屬性的名字就是我們定義的屬性的名字凄硼，屬性的類型是T開(kāi)始和后面的一些東西，等會(huì)下面會(huì)解釋這個(gè)個(gè)什么東東
name:name---attributes:T@"NSString",C,N,V_name
name:icon---attributes:T@"NSString",C,N,V_icon
name:age---attributes:TI,N,V_age
name:height---attributes:T@"NSString",C,N,V_height
name:money---attributes:T@"NSNumber",&,N,V_money
name:sex---attributes:Ti,N,V_sex
name:gay---attributes:Tc,N,GisGay,V_gay
Property Type String
You can use the property_getAttributes function to discover the name, the @encode type string of a property, and other attributes of the property.
The string starts with a T followed by the @encode type and a comma, and finishes with a V followed by the name of the backing instance variable. Between these, the attributes are specified by the following descriptors, separated by commas:
我們?nèi)〕雒總€(gè)type 所對(duì)應(yīng)的 code 拿到這些code我們就可以知道這是什么類型
- (void)getTypeCode:(NSString *)code
{
if ([code isEqualToString:JFPropertyTypeId]) {
_idType = YES;
} else if (code.length > 3 && [code hasPrefix:@"@\""]) {
// 去掉@"和"捷沸，截取中間的類型名稱
_code = [code substringWithRange:NSMakeRange(2, code.length - 3)];
_typeClass = NSClassFromString(_code);
_numberType = (_typeClass == [NSNumber class] || [_typeClass isSubclassOfClass:[NSNumber class]]);
// 判斷是否是模型類
_fromFoundation = [NSObject isClassFromFoundation:_typeClass];
}
// 是否為數(shù)字類型
NSString *lowerCode = code.lowercaseString;
NSArray *numberTypes = @[JFPropertyTypeInt, JFPropertyTypeShort, JFPropertyTypeBOOL1, JFPropertyTypeBOOL2, JFPropertyTypeFloat, JFPropertyTypeDouble, JFPropertyTypeLong, JFPropertyTypeChar];
if ([numberTypes containsObject:lowerCode]) {
_numberType = YES;
if ([lowerCode isEqualToString:JFPropertyTypeBOOL1]
|| [lowerCode isEqualToString:JFPropertyTypeBOOL2]) {
_boolType = YES;
}
}
}
定義一個(gè)常量類來(lái)描述這些code
/**
* 成員變量類型（屬性類型）
*/
NSString *const JFPropertyTypeInt = @"i";
NSString *const JFPropertyTypeShort = @"s";
NSString *const JFPropertyTypeFloat = @"f";
NSString *const JFPropertyTypeDouble = @"d";
NSString *const JFPropertyTypeLong = @"q";
NSString *const JFPropertyTypeChar = @"c";
NSString *const JFPropertyTypeBOOL1 = @"c";
NSString *const JFPropertyTypeBOOL2 = @"b";
NSString *const JFPropertyTypePointer = @"*";
NSString *const JFPropertyTypeIvar = @"^{objc_ivar=}";
NSString *const JFPropertyTypeMethod = @"^{objc_method=}";
NSString *const JFPropertyTypeBlock = @"@?";
NSString *const JFPropertyTypeClass = @"#";
NSString *const JFPropertyTypeSEL = @":";
NSString *const JFPropertyTypeId = @"@";
extern NSString *const JFPropertyTypeInt;
extern NSString *const JFPropertyTypeShort;
extern NSString *const JFPropertyTypeFloat;
extern NSString *const JFPropertyTypeDouble;
extern NSString *const JFPropertyTypeLong;
extern NSString *const JFPropertyTypeLongLong;
extern NSString *const JFPropertyTypeChar;
extern NSString *const JFPropertyTypeBOOL1;
extern NSString *const JFPropertyTypeBOOL2;
extern NSString *const JFPropertyTypePointer;
extern NSString *const JFPropertyTypeIvar;
extern NSString *const JFPropertyTypeMethod;
extern NSString *const JFPropertyTypeBlock;
extern NSString *const JFPropertyTypeClass;
extern NSString *const JFPropertyTypeSEL;
extern NSString *const JFPropertyTypeId;
現(xiàn)在我們?cè)俳y(tǒng)一下 目的：
1.拿到模型的屬性名摊沉，和對(duì)應(yīng)的數(shù)據(jù)類型. （OK）
2.用該屬性名作為鍵去字典中尋找對(duì)應(yīng)的值.(OK)
3.拿到值后將值轉(zhuǎn)換為屬性對(duì)應(yīng)的數(shù)據(jù)類型.(OK)
4.賦值.
接下來(lái)再整理下 目錄結(jié)構(gòu)
如上：整個(gè)JFModel的框架已經(jīng)搭好了
