iOS --如何方便查看model 里面的字段

如果我们的类中没有实现description 和debugDescription，当我们NSLog或者po的时候，输出的仅仅是一个内存地址，如下(lldb) po animal    (lldb):，这样对我们查看model里面的字段是很不方便的，因此我们需要打印属性的类可以实现下面的方法

- (NSString *)description{

return [NSString stringWithFormat:@"%@",[self properties_values]];

}

- (NSString *)debugDescription{

return [NSString stringWithFormat:@"%@",[self properties_values]];

}

#pragma mark---获取对象的所有属性 以及属性值

- (NSDictionary *)properties_values

{

NSMutableDictionary *props = [NSMutableDictionary dictionary];

unsigned int outCount, i;

objc_property_t *properties = class_copyPropertyList([self class], &outCount);

for (i = 0; i

{

objc_property_t property = properties[i];

const char* char_f =property_getName(property);

NSString *propertyName = [NSString stringWithUTF8String:char_f];

id propertyValue = [self valueForKey:(NSString *)propertyName];

if (propertyValue) [props setObject:propertyValue forKey:propertyName];

}

free(properties);

return props;

}

注意：需要导入头文件--#import,因为获取对象的所有属性 以及属性值是利用运行时实行的，下面是利用运行时遍历对象的属性和方法

1、/* 获取对象的所有属性，不包括属性值 */

- (NSArray *)getAllProperties

{

u_int count;

objc_property_t *properties  =class_copyPropertyList([self class], &count);

NSMutableArray *propertiesArray = [NSMutableArray arrayWithCapacity:count];

for (int i = 0; i

{

const char* propertyName =property_getName(properties[i]);

[propertiesArray addObject: [NSString stringWithUTF8String: propertyName]];

}

free(properties);

return propertiesArray;

}

2、/* 获取对象的所有属性 以及属性值 */

- (NSDictionary *)properties_aps

{

NSMutableDictionary *props = [NSMutableDictionary dictionary];

unsigned int outCount, i;

objc_property_t *properties = class_copyPropertyList([self class], &outCount);

for (i = 0; i

{

objc_property_t property = properties[i];

const char* char_f =property_getName(property);

NSString *propertyName = [NSString stringWithUTF8String:char_f];

id propertyValue = [self valueForKey:(NSString *)propertyName];

if (propertyValue) [props setObject:propertyValue forKey:propertyName];

}

free(properties);

return props;

}

3、/* 获取对象的所有方法 */

-(void)printMothList

{

unsigned int mothCout_f =0;

Method* mothList_f = class_copyMethodList([self class],&mothCout_f);

for(int i=0;i

{

Method temp_f = mothList_f[i];

IMP imp_f = method_getImplementation(temp_f);

SEL name_f = method_getName(temp_f);

const char* name_s =sel_getName(method_getName(temp_f));

int arguments = method_getNumberOfArguments(temp_f);

const char* encoding =method_getTypeEncoding(temp_f);

NSLog(@"方法名：%@,参数个数：%d,编码方式：%@",[NSString stringWithUTF8String:name_s],

arguments,[NSString stringWithUTF8String:encoding]);

}

free(mothList_f);

}