Assigning values to model (inherited and NSObject objects) in a dictionary---------"IOS Development"

This tutorial describes the use of the runtime extension NSObject, can be directly in the dictionary to the model assignment, this is quite useful technology.

PS: Details about runtime will be introduced in detail later

Source:

Nsobject+property.h and NSOBJECT+PROPERTY.M

  nsobject+property.h//  modelvaluetest1.0////  Created by Lisa on 14-9-15.//  Copyright (c) 2014 Lisa. All rights reserved.//#import <Foundation/Foundation.h> @interface nsobject-(void) setdatadictionary :(nsdictionary *) datadictionary;-(nsdictionary*) datadictionary; @end

nsobject+property.m//modelvaluetest1.0////Created by Lisa on 14-9-15.//Copyright (c) 2014 Lisa. All rights reserved.//#import "Nsobject+property.h" #import <objc/runtime.h> @implementation NSObject #pragma mark--public method-(void) Setdatadictionary: (nsdictionary *) datadictionary{[self setattributes: Datadictionary obj:self];}    -(nsdictionary*) datadictionary{//Get the attribute list Nsarray *properties = [self propertynames:[self class]]; Gets the property value according to the property list return [self propertiesandvaluesdictionary:self properties:properties];}    #pragma mark---Private method//the Setter method by property name-(SEL) Getsetterselwithattibutename: (NSString *) attributename{    NSString *captial = [[AttributeName substringtoindex:1]uppercasestring];    NSString *setterselstr = [NSString stringwithformat:@ "set%@%@:", Captial,[attributename SubstringFromIndex:1]]; Return nsselectorfromstring (SETTERSELSTR);} Set properties by Dictionary-(void) SetAttributes: (nsdictionary *) Datadic obj: (ID) obj{//Get all key values Nsenumerator *keyenum = [Datadic keyenumerator];        The dictionary key value (corresponding to the model's attribute value one by one) id attrbutename = nil; while (attrbutename = [Keyenum Nextobject]) {//Get patchwork Setter method sel sel = [obj getsetterselwithattibutename:a                Ttrbutename];            Verifies if the setter method can respond to if ([obj Respondstoselector:sel]) {id value = nil;            ID tmpvalue = Datadic[attrbutename];                            if ([Tmpvalue Iskindofclass:[nsnull class]]) {//If it is a NSNull type, the value is empty value = nil;                            } else {value = Tmpvalue; }//Execute setter method [obj Performselectoronmainthread:sel withobject:value waituntildone:[nsthread ismain        Thread]]; }}//gets a list of property names for a class-(Nsarray *) PropertyNames: (Class) class{nsmutablearray *propertynames = [[Nsmutablearray Alloc]ini    T];    unsigned int propertycount = 0; objc_property_t *properties = Class_copypropertylist (class, &pRopertycount);        for (unsigned int i =0; i<propertycount; ++i) {objc_property_t property = Properties[i];        const char *name = Property_getname (property);    [PropertyNames addobject:[nsstring Stringwithutf8string:name];    } free (properties); return propertynames;}    Gets the value of this property based on an array of attributes-(nsdictionary*) Propertiesandvaluesdictionary: (ID) obj properties: (Nsarray *) properties{    Nsmutabledictionary *propertiesvaluedic = [Nsmutabledictionary dictionary];        For (NSString *property in properties) {SEL GetSel =nsselectorfromstring);            if ([obj Respondstoselector:getsel]) {nsmethodsignature *signature = nil;            Signature = [obj Methodsignatureforselector:getsel];            Nsinvocation *invocation = [Nsinvocation invocationwithmethodsignature:signature];            [Invocation settarget:obj];            [Invocation Setselector:getsel];            NSObject *__unsafe_unretained valueobj = nil;       [Invocation invoke];     [Invocation getreturnvalue:&valueobj];            Assign to @ "" string if (valueobj = = nil) {valueobj = @ "";        } Propertiesvaluedic[property] = Valueobj; }} return propertiesvaluedic;} @end

Model of the test

LModelItems.h and LMODELITEMS.M

  lmodelitems.h//  modelvaluetest1.0////  Created by Lisa on 14-9-15.//  Copyright (c) 2014 Lisa. All rights reserved.//#import <Foundation/Foundation.h> @interface lmodelitems:nsobject@property (nonatomic, Strong) NSString *name, @property (nonatomic,strong) NSNumber *age; @property (nonatomic,strong) nsdictionary * Addressdic, @property (nonatomic,strong) Nsarray *eventd; @end

  lmodelitems.m//  modelvaluetest1.0////  Created by Lisa on 14-9-15.//  Copyright (c) 2014 Lisa. All rights reserved.//#import "LModelItems.h" @implementation lmodelitems@end

Use the scene:

>>>>>lviewcontroller.h and LVIEWCONTROLLER.M in the controller

  lviewcontroller.h//  modelvaluetest1.0////  Created by Lisa on 14-9-15.//  Copyright (c) 2014 Lisa. All rights reserved.//#import <UIKit/UIKit.h> @interface lviewcontroller:uiviewcontroller@end

lviewcontroller.m//modelvaluetest1.0////Created by Itotem on 14-9-15.//Copyright (c) 2014 Lisa. All rights reserved.//#import "LViewController.h" #import "Nsobject+property.h" #import "LModelItems.h" @interface Lviewcontroller () @end @implementation lviewcontroller-(ID) initwithnibname: (NSString *) Nibnameornil Bundle: (    NSBundle *) nibbundleornil{self = [super Initwithnibname:nibnameornil Bundle:nibbundleornil]; if (self) {//Custom initialization} return to self;}    -(void) viewdidload{[Super Viewdidload];    Lmodelitems *model = [Lmodelitems new]; Assignment by Dictionary model.datadictionary = @{@ "name": @ "Lisa" @ "Age": @26,@ "addressdic": @{@ "Provinces": @ "Beijing" @ "area": @ "Haidian"},@ "Eventd": @[@ "First", @ "second", @ "third"]};
Print Assignment result NSLog (@ "%@", model.datadictionary);    NSLog (@ "name=%@", model.name);    NSLog (@ "age=%@", model.age);    NSLog (@ "addressdic=%@", [Model.addressdic objectforkey:@ "Provinces"]);    NSLog (@ "eventd=%@", MODEL.EVENTD);    }-(void) didreceivememorywarning{[Super didreceivememorywarning]; Dispose of any resources the can be recreated.} @end

Printing information:

2014-09-15 17:11:36.948 modelvaluetest1.0[8386:60b] {

Addressdic = {

Area = "\u6d77\u6dc0\u533a";

Provinces = "\U5317\U4EAC";

};

Age = 26;

Eventd = (

First

Second

Third

);

name = Lisa;

}

2014-09-15 17:11:36.950 modelvaluetest1.0[8386:60b] Name=lisa

2014-09-15 17:11:36.951 modelvaluetest1.0[8386:60b] age=26

2014-09-15 17:11:36.952 modelvaluetest1.0[8386:60b] addressdic= Beijing

2014-09-15 17:11:36.952 modelvaluetest1.0[8386:60b] eventd= (

First

Second

Third

)

The following is a two-part core code (that meets a single function):

Assigning values to model (inherited and NSObject objects) in a dictionary---------"IOS Development"