- app开发过程中,与服务器数据交流时,服务器常常需要我们把一些集合以字符串的方式传给服务器,下面就是一些字符串和数组,字典,对象之间的转换。
/**
* 判断自己是否为空
*
* @return <#return value description#>
*/
- (BOOL) isBlank
{
if (!self.length ||
self == nil ||
self == NULL ||
(NSNull *)self == [NSNull null] ||
[self isKindOfClass:[NSNull class]] ||
[self isEqualToString:@"(null)"] ||
[self isEqualToString:@"<null>"] ||
[self isEqualToString:@"null"] ||
[self isEqualToString:@"NULL"]
) {
return YES;
}else {
return NO;
}
}
/**
* json字符串,转成字典
*
* 字符串调用
* @return <#return value description#>
*/
- (NSDictionary *)stringJsonToDictionary{
if ([self isBlank]) {
return nil;
}
NSData *jsonData = [self dataUsingEncoding:NSUTF8StringEncoding];
NSError *err;
NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:jsonData
options:NSJSONReadingMutableContainers
error:err];
if(err) {
NSLog(@"json解析失败:%@",err);
return nil;
}
return dictionary;
}
/**
* 字典转json字符串
*
* 字典调用
* @return <#return value description#>
*/
- (NSString *)dictionaryToJsonString{
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:self
options:NSJSONWritingPrettyPrinted
error:nil];
return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
}
/**
* 数组转json字符串
*
* 数组调用
* @return <#return value description#>
*/
- (NSString *)arrayToJsonString{
NSError *parseError = nil;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:arr options:NSJSONWritingPrettyPrinted error:&parseError];
return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
}
/**
* 对象转换为字典
*
* @param obj 需要转化的对象
*
* @return 转换后的字典
*/
+ (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];
NSString *propName = [NSString stringWithUTF8String:property_getName(prop)];
id value = [obj valueForKey:propName];
if(value == nil) {
value = [NSNull null];
} else {
value = [self getObjectInternal:value];
}
[dic setObject:value forKey:propName];
}
return dic;
}
+ (id)getObjectInternal:(id)obj {
if([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];
}