使用runtime进行model进行简单操作
Model 根类
/*Model 类*/
@interface GModel : NSObject
+ (instancetype) readPropertyFromDic:(NSDictionary*)dic;
- (NSDictionary*) dicAboutProperties;
@end
@implementation GModel
+ (instancetype) readPropertyFromDic:(NSDictionary*)infoDic{
GModel* obj = [[self alloc] init];
Class c = self.class;
while (c && c != [GModel class]) {
unsigned int outCount = 0;
Ivar* ivars = class_copyIvarList(c, &outCount);
/**class_copyPropertyList只获取“@property”声明的成员变量(获取的成员变量前面没有“_”)，
注意class_copyIvarList获取“{}”中的成员变量也不会主动加“_”**/
for (int i = 0; i < outCount; i++) {
Ivar ivar = ivars[i];
NSString* key = [NSString stringWithUTF8String:ivar_getName(ivar)];
key = [key substringFromIndex:1]; // 去掉下划线_
id value = infoDic[key];
if(value == nil) continue;
NSString* type = [NSString stringWithUTF8String:ivar_getTypeEncoding(ivar)];
NSRange range = [type rangeOfString:@"@"];
if (range.location != NSNotFound) {
type = [type substringWithRange:NSMakeRange(2, type.length - 3)];
Class typeClass = NSClassFromString(type);
if ([typeClass isSubclassOfClass:[GModel class]]) {
value = [typeClass readPropertyFromDic:value];
}
}
[obj setValue:value forKeyPath:key];
}
free(ivars);
c = [c superclass];
}
return obj;
}
- (NSDictionary*) dicAboutProperties{
NSMutableDictionary* dic = [[NSMutableDictionary alloc] init];
Class c = self.class;
while (c && c != [GModel class]) {
unsigned int outCount = 0;
Ivar* ivars = class_copyIvarList(c, &outCount);
for (int i = 0; i < outCount; i++) {
Ivar ivar = ivars[i];
NSString* key = [NSString stringWithUTF8String:ivar_getName(ivar)];
id value = [self valueForKeyPath:key];
NSString* type = [NSString stringWithUTF8String:ivar_getTypeEncoding(ivar)];
NSRange range = [type rangeOfString:@"@"];
if (range.location != NSNotFound) {
type = [type substringWithRange:NSMakeRange(2, type.length - 3)];
Class typeClass = NSClassFromString(type);
if ([typeClass isSubclassOfClass:[GModel class]]) {
value = [value dicAboutProperties];
}else if(![type hasPrefix:@"NS"]){
value = nil; //其他类型不处理
}
}
key = [key substringFromIndex:1]; // 去掉下划线_
[dic setValue:value forKey:key];
}
free(ivars);
c = [c superclass];
}
return dic;
}
@end
测试对象Person Man Society
@interface Person : GModel
@property (nonatomic, strong) NSString* name;
@property (nonatomic, assign) NSUInteger age;
@end
@interface Man : Person
@property (nonatomic, strong) NSString* other;
@end
@interface Society : GModel
@property (nonatomic, strong) Man* aMan;
@property (nonatomic, strong) Person* aPerson;
@property (nonatomic, strong) NSNumber* count;
@end
进行字典数据与model的互转
NSDictionary* personData = @{@"name" : @"Mrs",
@"age" : @29};
NSMutableDictionary* manData = [NSMutableDictionary dictionaryWithDictionary:personData];
manData[@"other"] = @"I'm a man";
NSDictionary* societyData = @{@"aMan" : manData,
@"aPerson" : personData,
@"count" : @"2"
};
///通过数据创建model对象
Person* aPerson = [Person readPropertyFromDic:personData];
Man* aMan = [Man readPropertyFromDic:manData];
Society* aSociety = [Society readPropertyFromDic:societyData];
///通过model对象获取属性值字典
NSDictionary* outPerson = [aPerson dicAboutProperties];
NSDictionary* outMan = [aMan dicAboutProperties];
NSDictionary* outSociety = [aSociety dicAboutProperties];
