NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
[_abbreviationBtn.titleLabel.text dataUsingEncoding:enc];
NSString *string = [[NSString alloc]initWithData:[_abbreviationBtn.titleLabel.text dataUsingEncoding:enc] encoding:enc];
NSDictionary *dic = @{@"plateNo":str,@"firstChar":string};
我是这样解决的但是没反应