+ (BOOL)validateNumber:(NSString*)number text:(NSString *)textFieldText floatCount:(NSInteger)floatCount {
BOOL res = YES;
NSCharacterSet* tmpSet = [NSCharacterSet characterSetWithCharactersInString:@"0123456789."];
int i = 0;
if (number.length==0) {
//允许删除
return YES;
}
while (i < number.length) {
//确保是数字
NSString * string = [number substringWithRange:NSMakeRange(i, 1)];
NSRange range = [string rangeOfCharacterFromSet:tmpSet];
if (range.length == 0) {
res = NO;
break;
}
i++;
}
if (textFieldText.length==0) {
//第一个不能是0和.
if ([number isEqualToString:@"0"]||[number isEqualToString:@"."]) {
return NO;
}
}
NSArray *array = [textFieldText componentsSeparatedByString:@"."];
NSInteger count = [array count] ;
//小数点只能有一个
if (count>1&&[number isEqualToString:@"."]) {
return NO;
}
//控制小数点后面的字数
if ([textFieldText rangeOfString:@"."].location!=NSNotFound) {
if (textFieldText.length-[textFieldText rangeOfString:@"."].location>floatCount) {
return NO;
}
}
return res;
}
调用：
-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
if (textField==degreeTextField) {
return [CommanTool validateNumber:string text:textField.text floatCount:1];
}
return YES;
}
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