对输入框输入的字符进行判断,检查输入类型是不是数字计算的类型
//对输入的字符进行判断 static NSString *numbers = @"0123456789"; static NSString *numbersPeriod = @"0123467890."; static NSString *numbersComma = @"0123456789,"
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(??????)?? φ(≧ω≦*)?