這裡不讨論JSONModel和Alamofire這兩個項目,直接上代碼
BaseModel.h
#import "JSONModel.h"
@interface BaseModel : JSONModel
-(instancetype)initWithDictionary:(NSDictionary*)dict;
@end
BaseModel.m
#import "BaseModel.h"
@implementation BaseModel
//Make all model properties optional (avoid if possible)
+(BOOL)propertyIsOptional:(NSString*)propertyName
{
return YES;
}
-(instancetype)initWithDictionary:(NSDictionary*)dict {
return (self = [[super init] initWithDictionary:dict error:nil]);
所有的Model都要繼承BaseModel,其他寫法都一樣
BaseAPI.swift
internal func requestModel<T: BaseModel>(method: Method, _ URLString: URLStringConvertible, parameters: [String: AnyObject]? = nil, success: (T) -> Void, failure: (NSError?) -> Void) {
mHttpManager.request(method, URLString , parameters: parameters, encoding: ParameterEncoding.JSON)
.responseJSON { (request, response, data, error) in
if error == nil {
if let dict = data as? NSDictionary {
if let model = T(dictionary: dict as [NSObject : AnyObject]) {
success(model)
return
}
}
}
failure(error)
}
}
internal func requestArray<T: BaseModel>(method: Method, _ URLString: URLStringConvertible, parameters: [String: AnyObject]? = nil, success: (Array<T>) -> Void, failure: (NSError?) -> Void) {
if let array = data as? NSArray {
if let result = T.arrayOfModelsFromDictionaries(array as [AnyObject]).copy() as? Array<T>{
success(result)
代碼說明
1、mHttpManager這個是Alamofire的Manager對象
2、注意服務端的傳回的資料格式,這裡支援Model和Array<Model>
3、注意在Swift裡面NSDictionary轉Model,用T(dictionary: dict as [NSObject : AnyObject]),這個T就是具體的泛型類型
4、注意在Swift裡面NSArray轉Model數組,用T.arrayOfModelsFromDictionaries(array as [AnyObject]).copy() as? Array<T>,注意不要用BaseModel. arrayOfModelsFromDictionaries(編譯不會報錯但是類型轉不出來)
5、具體用法:
public func casts(success: (Array<CustomModel>) -> Void, failure: (NSError?) -> Void) {
requestArray(Method.GET, URL_CASTS, parameters: nil, success: success, failure: failure)
}
public func like(id: String, success: (CustomModel) -> Void, failure: (NSError?) -> Void) {
requestModel(Method.PATCH, String(format: URL_CASTS_LIKE, id), parameters: nil, success: success, failure: failure)
非常輕松和簡單, 可以少寫很多重複代碼。
後期維護
2016-04-21
Swift 中使用不支援嵌套 JSONModel 數組
@property (strong, nonatomic) NSArray<App *> *apps;
@property (strong, nonatomic) NSArray<User *> *users;
解決辦法:
@property (strong, nonatomic) NSArray<NSDictionary *> *apps;
@property (strong, nonatomic) NSArray<NSDictionary *> *users;
然後在 Swift 這邊轉一下
self.users = users.map{ User(dictionary: $0 ) }
self.apps = apps.map{ App(dictionary: $0 ) }