Skip to content

防止 字典value为nil、数组越界、<null>、NSNull对象导致的Crash.

License

Notifications You must be signed in to change notification settings

defaultyuan/DYSafeObject

Repository files navigation

DYSafeObject

仓库描述

为了避免线上项目中的用到的数据而产生的Crash

使用方法

直接引入工程项目里面就可以生效,无需添加import

pod 'DYSafeObject', '~> 0.1.1'

然后安装

pod update

以下是测试代码

数组 Test

防止数组里面对象为nil的情况、数组越界产生的崩溃

NSString *s1 = nil;
NSArray *array = @[s1,@"a",@"v",@"c",@"d",@"f",@"s",@"v",@"g"];
NSMutableArray *mutableArray = [[NSMutableArray alloc] initWithArray:array];
NSLog(@"数组 Test--array:%@   mutableArray:%@",array[20],mutableArray[20]);
NSLog(@"数组 Test--array:%@   mutableArray:%@",[array objectAtIndex:20],mutableArray[20]);
NSLog(@"数组 Test--array%@",array);

字典 Test

防止字典的key与value为nil产生的崩溃

NSString *key = nil;
NSString *str = nil;
NSDictionary *dict = @{key:str};
NSArray *dArray = @[str];
NSMutableDictionary *mutableDict = [NSMutableDictionary dictionary];
mutableDict[@"key"] = str;

NSLog(@"字典 Test--dict:%@",dict);
NSLog(@"字典 Test--dArray:%@",dArray);
NSLog(@"字典 Test--mutableDict:%@ key:%@",mutableDict,mutableDict[@"key"]);

字符串 Test

防止字符串长度越界

NSMutableString *string = [[NSMutableString alloc] initWithFormat:@"世界因我而精彩"];
NSLog(@"字符串 Test--%@",[string substringFromIndex:50]);

处理NSNull 异常

消息转发 Test

NSDictionary *dic2 = @{@"key":[NSNull null]};
NSLog(@"dic2==%@",dic2);
[dic2[@"key"] UTF8String];