@property(nonatomic,assign)BOOLisHaveDian;
@property(nonatomic,assign)BOOLisFirstZero;
- (BOOL)textField:(UITextField*)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString*)string {
if(textField ==self.amountTextField) {
if([textField.textrangeOfString:@"."].location==NSNotFound) {
_isHaveDian=NO;
}
if([textField.textrangeOfString:@"0"].location==NSNotFound) {
_isFirstZero=NO;
}
if([stringlength]>0)
{
unicharsingle=[stringcharacterAtIndex:0];//当前输入的字符
if((single >='0'&& single<='9') || single=='.')//数据格式正确
{
if([textField.textlength]==0){
if(single =='.'){
//首字母不能为小数点
returnNO;
}
if(single =='0') {
_isFirstZero=YES;
returnYES;
}
}
if(single=='.'){
if(!_isHaveDian)//text中还没有小数点
{
_isHaveDian=YES;
returnYES;
}else{
returnNO;
}
}elseif(single=='0'){
if((_isFirstZero&&_isHaveDian)||(!_isFirstZero&&_isHaveDian)) {
//首位有0有.（0.01）或首位没0有.（10200.00）可输入两位数的0
if([textField.textisEqualToString:@"0.0"]){
returnNO;
}
NSRangeran=[textField.textrangeOfString:@"."];
inttt=(int)(range.location-ran.location);
if(tt <=2){
returnYES;
}else{
returnNO;
}
}elseif(_isFirstZero&&!_isHaveDian){
//首位有0没.不能再输入0
returnNO;
}else{
returnYES;
}
}else{
if(_isHaveDian){
//存在小数点，保留两位小数
NSRangeran=[textField.textrangeOfString:@"."];
inttt= (int)(range.location-ran.location);
if(tt <=2){
returnYES;
}else{
returnNO;
}
}elseif(_isFirstZero&&!_isHaveDian){
//首位有0没点
returnNO;
}else{
returnYES;
}
}
}else{
//输入的数据格式不正确
returnNO;
}
}else{
returnYES;
}
}
returnYES;
}
