iOS判斷NSString 只含有數字

iOS判斷NSString 只含有數字

//判斷是否為整形：

 

- (BOOL)isPureInt:(NSString*)string{

NSScanner* scan = [NSScanner scannerWithString:string];

int val;

return[scan scanInt:&val] && [scan isAtEnd];

}

//判斷是否為浮點形：

- (BOOL)isPureFloat:(NSString*)string{

NSScanner* scan = [NSScanner scannerWithString:string];

float val;

return[scan scanFloat:&val] && [scan isAtEnd];

}

 

if( ![self isPureInt:textField.text] || ![self isPureFloat:textField.text]){

textField.textColor = [UIColor redColor];

textField.text = @"警告:含非法字元，請輸入純數字！";

return;

}else{

textField.textColor = [UIColor blackColor];

if ([textField.text integerValue]>self.moneyT) {

[SMAlertView showAlert:[NSString stringWithFormat:@"退款金額不能超過錢袋的總金額%ld，請重新輸入",(long)self.moneyT]];

textField.text=nil;

}else{

self.money = textField.text;

}

}