How to get decimal value from UITextField?

I have my database in Sqlite and the开发者_Go百科 field name is Amount with float datatype.now the value of amount is entered in textfiled.so my question is how to get decimal value from textbox?

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try this :

float amount = [yourTextField.text floatValue];

EDITED

yes as taskinoor mentioned you should first check weather your text field contains any alphabets or not.

to check, try this

    NSString *aString = @"22.60Hello";
    NSCharacterSet * set = [[NSCharacterSet characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLKMNOPQRSTUVWXYZ"] invertedSet];

    if ([aString rangeOfCharacterFromSet:set].location != NSNotFound) 
    {
        NSLog(@"This string contains illegal characters");
    }

Hope this helps you.

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float f = [myTextField.text floatValue];

Note that you should check yourself that the text field contains a valid number. From NSString manual,

The floating-point value of the receiver’s text as a float, skipping whitespace at the beginning of the string. Returns HUGE_VAL or –HUGE_VAL on overflow, 0.0 on underflow. Also returns 0.0 if the receiver doesn’t begin with a valid text representation of a floating-point number.

This method won't tell you that the input abc is not a valid number.

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NSString *decimalvalue=[NSString stringWithString:[txtfield.text componentsSeparatedByString:@"."] objectAtIndex:1]];

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Get the value from textbox and store in string. And you need to just convert this string to float value and insert in database.

this might work :

NSString *myString = (string initialization here);
float stringFloat = [myString floatValue];

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float decimalNum = [textfield.text floatvalue]