how to set text Field value in iphone

i have tried update the 开发者_如何学编程value of text fields but they are show the old values,

code--

double lastValue;
lastValue = [strLastval doubleValue];
textPriceAtExp.text=[NSString stringWithFormat:@"%0.2f",lastValue];  

frist time show the correct value but enter the text fields value show the old values.

the lastValue gaine the html data. any help plz thanks

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The first thing to check is that the UITextField you created in IB is actually connected to the UITextField in your code (textPriceAtExp).

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The codes are too few. So all I can help you is to guess what happens. Maybe the textPriceAtExp is nil, because it is a property, not a member variable. Maybe the strLastval is the old value, so nothing is wrong.

You can use NSLog() to check some value of the variables in codes.