runtime学习实战一：类的属性进行归档解档
#import <Foundation/Foundation.h>
@interface PYPerson : NSObject
@property (nonatomic, assign) int age;
@property (nonatomic, assign) int height;
@property (nonatomic, copy) NSString *name;
@property (nonatomic, assign) int age2;
@property (nonatomic, assign) int height2;
@property (nonatomic, assign) int age3;
@property (nonatomic, assign) int height3;
@property (nonatomic, assign) int age4;
@property (nonatomic, assign) int height4;
@end
#import "PYPerson.h"
#import <objc/runtime.h>
@implementation PYPerson
- (instancetype)init {
if (self = [super init]) {
_age = 1;
_height = 2;
_name = @"name";
_age2 = 3;
_height2 = 4;
_age3 = 5;
_height3 = 6;
_age4 = 7;
_height4 = 8;
}
return self;
}
- (NSString *)description {
return @"我是一个实例person";
}
- (void)encodeWithCoder:(NSCoder *)encoder {
unsigned int count = 0;
Ivar *ivars = class_copyIvarList([PYPerson class], &count);
for (int i = 0; i<count; i++) {
// 取出i位置对应的成员变量
Ivar ivar = ivars[i];
// 查看成员变量
const char *name = ivar_getName(ivar);
// 归档
NSString *key = [NSString stringWithUTF8String:name];
id value = [self valueForKey:key];
[encoder encodeObject:value forKey:key];
}
free(ivars);
}
- (id)initWithCoder:(NSCoder *)decoder {
if (self = [super init]) {
unsigned int count = 0;
Ivar *ivars = class_copyIvarList([PYPerson class], &count);
for (int i = 0; i<count; i++) {
// 取出i位置对应的成员变量
Ivar ivar = ivars[i];
// 查看成员变量
const char *name = ivar_getName(ivar);
// 归档
NSString *key = [NSString stringWithUTF8String:name];
id value = [decoder decodeObjectForKey:key];
// 设置到成员变量身上
[self setValue:value forKey:key];
}
free(ivars);
}
return self;
}
#import <Foundation/Foundation.h>
#import "PYPerson.h"
#import "APLProduct.h"
int main(int argc, const char * argv[]) {
@autoreleasepool {
// insert code here...
NSLog(@"Hello, World!");
PYPerson *person = [[PYPerson alloc] init];
[[NSUserDefaults standardUserDefaults] setObject:[NSKeyedArchiver archivedDataWithRootObject:person] forKey:@"person"];
NSData *personData = [[NSUserDefaults standardUserDefaults] objectForKey:@"person"];
if (personData != nil) {
PYPerson *tmpPerson = [NSKeyedUnarchiver unarchiveObjectWithData:personData];
NSLog(@"%@", tmpPerson);
}
}
return 0;
}
