how to keep the block format the way it is? - clang-format

Question

I use clang-format to format my code.
Everything works fine except for the block code, as you can see the code below, the failure block has indent 4 space ...
_loginOperation = [CheckTIMPreparation tim_CheckPreparationSuccess:^{
[weakSelf checkIsJoinGroup];
} failure:^(NSString *errorString) {
[weakSelf showloginingViewWithFail];
}];
after format:
_loginOperation = [CheckTIMPreparation tim_CheckPreparationSuccess:^{
[weakSelf checkIsJoinGroup];
}
failure:^(NSString *errorString) {
[weakSelf showloginingViewWithFail];
}];
How can I customize my clang-format config?
Here is my config:
BasedOnStyle: LLVM
IndentWidth: 4
BreakBeforeBraces: Attach
AllowShortIfStatementsOnASingleLine: true
IndentCaseLabels: true
ObjCBlockIndentWidth: 4
ObjCSpaceAfterProperty: true
ColumnLimit: 0
AlignTrailingComments: true
SpaceAfterCStyleCast: true
SpacesInParentheses: false
SpacesInSquareBrackets: false

Answer 1

It's four years later now, but possibly somebody would like to see an answer to this question anyway...
Just to be sure, your question title seems to ask how to prevent clang-format from modifying a block of code. If that's all you want, you can do that by putting // clang-format off and // clang-format on around that code. See the documentation for more details.
You don't mention what version of clang-format you're using, and unfortunately your code is formatted differently by different versions of clang-format. (I explored these versions using the configurator).
Version 3.5.2 gives:
_loginOperation = [CheckTIMPreparation tim_CheckPreparationSuccess:^{
[weakSelf checkIsJoinGroup];
} failure:^(NSString *errorString) { [weakSelf showloginingViewWithFail]; }];
Version 3.6.0 gives:
_loginOperation = [CheckTIMPreparation tim_CheckPreparationSuccess:^{
[weakSelf checkIsJoinGroup];
} failure:^(NSString *errorString) {
[weakSelf showloginingViewWithFail];
}];
Versions 3.7.0 through 6.0.1 give:
_loginOperation = [CheckTIMPreparation tim_CheckPreparationSuccess:^{
[weakSelf checkIsJoinGroup];
}
failure:^(NSString *errorString) {
[weakSelf showloginingViewWithFail];
}];
Version 7.0.1 through 10.0.0 give:
_loginOperation = [CheckTIMPreparation
tim_CheckPreparationSuccess:^{
[weakSelf checkIsJoinGroup];
}
failure:^(NSString *errorString) {
[weakSelf showloginingViewWithFail];
}];
So you were perhaps using something like version 6.0.0, and simply upgrading to a newer version of clang-format might give you formatting that you would like better.
In addition, you may also want to set the style option AllowShortBlocksOnASingleLine: true (see the documentation for details). For clang-format version 10.0.0, your code would then look like this:
_loginOperation = [CheckTIMPreparation
tim_CheckPreparationSuccess:^{ [weakSelf checkIsJoinGroup]; }
failure:^(NSString *errorString) { [weakSelf showloginingViewWithFail]; }];