YZStrongExtension

安装使用

pod 'YZExtension', '~> 2.0.0'

说明

在使用数组或字典、字符串时，经常遇到越界或nil对象引起的崩溃。在复杂的项目中，无法逐一排查。通过使用 method swizzling 技术实现这类异常的修复，在运行中不会出现崩溃。

• 数组越界取值

  NSMutableArray *list = [NSMutableArray new];
  id object = [list objectAtIndex:1000];
  NSLog(@"%@",object);// 0x600000446e70 [__NSArrayM objectAtIndex:] index 1000 beyond bounds [0 .. 0]
  
  

• 数组插入nil对象

  NSMutableArray *list = [NSMutableArray new];
  [list insertObject:nil atIndex:0];
  // 0x600000446e70 [__NSArrayM insertObject:atIndex:] object cannot be nil
  
  

• 字典添加nil对象

  NSString *text = nil;
  [list addObject:@{@"name":text}];
  
  

• 字典设置 key、object 为nil对象

  NSMutableDictionary *dict = [NSMutableDictionary new];
  [dict setObject:nil forKey:@"test"];
  [dict setObject:@"object" forKey:text];
  // 0x60400023a060 [__NSDictionaryM setObject:forKey:] key cannot be nil (object: object)
  // 0x60400023a060 [__NSDictionaryM setObject:forKey:] object cannot be nil (key: test)
  
  

• NSString 截取越界

  NSString *tmp = @"hello wrold";
  NSString *p = [tmp substringFromIndex:100];
  p = [tmp substringToIndex:300];
  p = [tmp substringWithRange:(NSRange){20,40}];