關於runtime的知識已經有不少的講解(傳送門:對runtime的理解 http://www.jianshu.com/p/927c8384855a),但一直不知道runtime的使用場景, 接下來利用runtime實現將字典轉換成model。但願你們對runtime的使用有個初步瞭解。測試
首先定義個RuntimeModel 類atom
//RuntimeModel.h #import <Foundation/Foundation.h> #import <objc/runtime.h> //別忘記引入庫 @interface RuntimeModel : NSObject -(instancetype)initWithDic :(NSDictionary *)dic; @end //RuntimeModel.m -(instancetype)initWithDic :(NSDictionary *)dic { self = [super init]; if (self) { NSMutableArray * keyArray = [NSMutableArray array]; NSMutableArray * attributeArray = [NSMutableArray array]; unsigned int outCount = 0 ; objc_property_t * propertys = class_copyPropertyList([self class], &outCount); //獲取該類的屬性列表 for (int i = 0 ; i < outCount; i++) { objc_property_t property = propertys[i]; NSString * propertyName = [NSString stringWithCString:property_getName(property) encoding:NSUTF8StringEncoding]; //獲取屬性對應的名稱 [keyArray addObject:propertyName]; } free(propertys); //記得要釋放 for (NSString * key in keys) { if (![keyArray containsObject:key]||[dic valueForKey:key] == nil) continue ; [self setValue:[dic valueForKey:key] forKey:key]; } } return self; }
而後咱們建立個model繼承RuntimeModel類,並添加屬性spa
// DataModel.h #import <Foundation/Foundation.h> #import "RuntimeModel.h" @interface DataModel : RuntimeModel @property (nonatomic , strong)NSString * name ; @property (nonatomic , strong)NSString * imageUrl;
接下來能夠在ViewController裏調用試試結果code
- (void)viewDidLoad { [super viewDidLoad]; NSDictionary * dic = [[NSDictionary alloc]initWithObjectsAndKeys:@"測試",@"name",@"圖片連接",@"imageUrl", nil]; DataModel * model = [[DataModel alloc]initWithDic:dic]; NSLog(@"name --%@ , imageUrl --%@",model.name ,model.imageUrl); }
測試結果是繼承
2016-03-25 11:21:49.626 Wheat[750:64557] name --測試 , imageUrl --圖片連接圖片