在实际开发中，我们经常需要根据字典来建模型。每次都打那么一串代码，想想也是挺恶心的。可以自己给NSDictionary写一个分类，进行属性生成。

NSDictionary+Property.h

#import 
     
      @interface NSDictionary (Property)- (void)createPropertyCode;@end
     

NSDictionary+Property.m

#import "NSDictionary+Property.h"@implementation NSDictionary (Property)// isKindOfClass:判断是否是当前类或者子类// 生成属性代码 => 根据字典中所有key- (void)createPropertyCode{    NSMutableString *codes = [NSMutableString string];    // 遍历字典    [self enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key, id  _Nonnull value, BOOL * _Nonnull stop) {                NSString *code;        if ([value isKindOfClass:[NSString class]]) {            code = [NSString stringWithFormat:@"@property (nonatomic, strong) NSString *%@;",key];        } else if ([value isKindOfClass:NSClassFromString(@"__NSCFBoolean")]) {            code = [NSString stringWithFormat:@"@property (nonatomic, assign) BOOL %@;",key];        } else if ([value isKindOfClass:[NSNumber class]]) {             code = [NSString stringWithFormat:@"@property (nonatomic, assign) NSInteger %@;",key];        } else if ([value isKindOfClass:[NSArray class]]) {             code = [NSString stringWithFormat:@"@property (nonatomic, strong) NSArray *%@;",key];        } else if ([value isKindOfClass:[NSDictionary class]]) {             code = [NSString stringWithFormat:@"@property (nonatomic, strong) NSDictionary *%@;",key];        }        [codes appendFormat:@"\n%@\n",code];            }];    NSLog(@"%@",codes);}@end