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Please try to use the following method to find which variable has the problem
In Xcode, use the shortcut key +7 to enter the breakpoint interface.
Click the "+" in the lower left corner and add a global exception breakpoint,
Run the program.
If the problem cannot be solved through the above solutions, please post the relevant code and exception screenshots.
Please try to use the following method to find which variable has the problem
In Xcode, use the shortcut key +7 to enter the breakpoint interface.
Click the "+" in the lower left corner and add a global exception breakpoint,
Run the program.
If the problem cannot be solved through the above solutions, please post the relevant code and exception screenshots.