常见开发崩溃

1.-[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from ob...
字典值为nil会崩溃

NSString *abc = nil;
@{@"abc":abc }

2. -[__NSCFConstantString rangeOfString:options:range:locale:]: nil argument'

NSRange range = [@"" rangeOfString:nil];

会崩溃