转来一个自动序列化的 关于NSObject的类目
自动序列化（转）
#import "NSObject+AutoEncodeDecode.h"
@implementation NSObject (AutoEncodeDecode)
- (void)encodeWithCoder:(NSCoder *)encoder {
Class cls = [selfclass];
while (cls != [NSObjectclass]) {
unsigned int numberOfIvars =0;
Ivar* ivars = class_copyIvarList(cls, &numberOfIvars);
for(const Ivar* p = ivars; p < ivars+numberOfIvars; p++){
Ivar const ivar = *p;
const char *type =ivar_getTypeEncoding(ivar);
NSString *key = [NSStringstringWithUTF8String:ivar_getName(ivar)];
id value = [selfvalueForKey:key];
if (value) {
switch (type[0]) {
case _C_STRUCT_B: {
NSUInteger ivarSize =0;
NSUInteger ivarAlignment =0;
NSGetSizeAndAlignment(type, &ivarSize, &ivarAlignment);
NSData *data = [NSDatadataWithBytes:(constchar *)self + ivar_getOffset(ivar)
length:ivarSize];
[encoder encodeObject:dataforKey:key];
}
break;
default:
[encoder encodeObject:value
forKey:key];
break;
}
}
}
free(ivars);
cls = class_getSuperclass(cls);
}
}
- (id)initWithCoder:(NSCoder *)decoder {
self = [self init];
if (self) {
Class cls = [selfclass];
while (cls != [NSObjectclass]) {
unsigned int numberOfIvars =0;
Ivar* ivars = class_copyIvarList(cls, &numberOfIvars);
for(constIvar* p = ivars; p < ivars+numberOfIvars; p++){
Ivar const ivar = *p;
const char *type =ivar_getTypeEncoding(ivar);
NSString *key = [NSStringstringWithUTF8String:ivar_getName(ivar)];
id value = [decoder decodeObjectForKey:key];
if (value) {
switch (type[0]) {
case _C_STRUCT_B: {
NSUInteger ivarSize =0;
NSUInteger ivarAlignment =0;
NSGetSizeAndAlignment(type, &ivarSize, &ivarAlignment);
NSData *data = [decoderdecodeObjectForKey:key];
char *sourceIvarLocation = (char*)self+ivar_getOffset(ivar);
[data getBytes:sourceIvarLocationlength:ivarSize];
}
break;
default:
[self setValue:[decoder decodeObjectForKey:key]
forKey:key];
break;
}
}
}
free(ivars);
cls = class_getSuperclass(cls);
}
}
return self;
}