「Objective-Cの入門」オブジェクトを印刷するサンプルプログラム

2014年8月5日

Objective-Cコード下記：

+ (NSDictionary*)getObjectData:(id)obj
{
NSMutableDictionary *dic = [NSMutableDictionary dictionary];
unsigned int propsCount;
objc_property_t *props = class_copyPropertyList([obj class], &propsCount);
for(int i = 0;i < propsCount; i++) {
objc_property_t prop = props[i];
id value = nil;

@try {
NSString *propName = [NSString stringWithUTF8String:property_getName(prop)];
value = [self getObjectInternal:[obj valueForKey:propName]];
if(value != nil) {
[dic setObject:value forKey:propName];
}
}
@catch (NSException *exception) {
[self logError:exception];
}

}
return dic;
}

+ (void)print:(id)obj
{
NSLog(@"%@", [self getObjectData:obj]);
}

+ (NSData*)getJSON:(id)obj options:(NSJSONWritingOptions)options error:(NSError**)error
{
return [NSJSONSerialization dataWithJSONObject:[self getObjectData:obj] options:options error:error];
}

+ (id)getObjectInternal:(id)obj
{
if(!obj
|| [obj isKindOfClass:[NSString class]]
|| [obj isKindOfClass:[NSNumber class]]
|| [obj isKindOfClass:[NSNull class]]) {
return obj;
}

if([obj isKindOfClass:[NSArray class]]) {
NSArray *objarr = obj;
NSMutableArray *arr = [NSMutableArray arrayWithCapacity:objarr.count];
for(int i = 0;i < objarr.count; i++) {
[arr setObject:[self getObjectInternal:[objarr objectAtIndex:i]] atIndexedSubscript:i];
}
return arr;
}

if([obj isKindOfClass:[NSDictionary class]]) {
NSDictionary *objdic = obj;
NSMutableDictionary *dic = [NSMutableDictionary dictionaryWithCapacity:[objdic count]];
for(NSString *key in objdic.allKeys) {
[dic setObject:[self getObjectInternal:[objdic objectForKey:key]] forKey:key];
}
return dic;
}
return [self getObjectData:obj];
}

+ (void)logError:(NSException*)exp
{
#if PRINT_OBJ_LOGGING
NSLog(@"PrintObject Error: %@", exp);
#endif
}