How can I compare two variable in onPress?
0
I am trying to create a changing pin screen and i was failed in comparing two variable that getting from the user (new pin and comfirm pin). The error show me that "this.state.newpin" is an undefined object.
class SettingScreen extends Component {
state = {
oldpin: '000000',
newpin: '',
secpin: ''
}
onPressButton(){
if( this.state.newpin == this.state.secpin){
ToastAndroid.show("Password Changed", ToastAndroid.SHORT);
this.setState({ oldpin : this.state.newpin})
}
else {
ToastAndroid.show("Password Unmatched", ToastAndroid.SHORT);
}
}
handleNewPin = (text) => {
this.setState({ newpin: text })
}
handleSecPin = (text) => {
this.setState({ secpin: text })
}
...
<TextInput onChangeText = {this.handleNewPin} />
<TextInput onChangeText = {this.handleSecPin} />
<TouchableOpacity onPress={this.onPressButton}>
<Text> Change Password </Text>
</TouchableOpacity>
I can get the output for "this.state.newpin" and "this.state.secpin" from user.
I just failed in the comparing statement ( OnPressButton()).
I am new in React-Native.
Sorry for any inconvenience.
react-native comparison
asked Jan 19 at 12:04
DMC EXCDMC EXC
225
add a comment |
0
I am trying to create a changing pin screen and i was failed in comparing two variable that getting from the user (new pin and comfirm pin). The error show me that "this.state.newpin" is an undefined object.
class SettingScreen extends Component {
state = {
oldpin: '000000',
newpin: '',
secpin: ''
}
onPressButton(){
if( this.state.newpin == this.state.secpin){
ToastAndroid.show("Password Changed", ToastAndroid.SHORT);
this.setState({ oldpin : this.state.newpin})
}
else {
ToastAndroid.show("Password Unmatched", ToastAndroid.SHORT);
}
}
handleNewPin = (text) => {
this.setState({ newpin: text })
}
handleSecPin = (text) => {
this.setState({ secpin: text })
}
...
<TextInput onChangeText = {this.handleNewPin} />
<TextInput onChangeText = {this.handleSecPin} />
<TouchableOpacity onPress={this.onPressButton}>
<Text> Change Password </Text>
</TouchableOpacity>
I can get the output for "this.state.newpin" and "this.state.secpin" from user.
I just failed in the comparing statement ( OnPressButton()).
I am new in React-Native.
Sorry for any inconvenience.
react-native comparison
asked Jan 19 at 12:04
DMC EXCDMC EXC
225
add a comment |
0
0
0
I am trying to create a changing pin screen and i was failed in comparing two variable that getting from the user (new pin and comfirm pin). The error show me that "this.state.newpin" is an undefined object.
class SettingScreen extends Component {
state = {
oldpin: '000000',
newpin: '',
secpin: ''
}
onPressButton(){
if( this.state.newpin == this.state.secpin){
ToastAndroid.show("Password Changed", ToastAndroid.SHORT);
this.setState({ oldpin : this.state.newpin})
}
else {
ToastAndroid.show("Password Unmatched", ToastAndroid.SHORT);
}
}
handleNewPin = (text) => {
this.setState({ newpin: text })
}
handleSecPin = (text) => {
this.setState({ secpin: text })
}
...
<TextInput onChangeText = {this.handleNewPin} />
<TextInput onChangeText = {this.handleSecPin} />
<TouchableOpacity onPress={this.onPressButton}>
<Text> Change Password </Text>
</TouchableOpacity>
I can get the output for "this.state.newpin" and "this.state.secpin" from user.
I just failed in the comparing statement ( OnPressButton()).
I am new in React-Native.
Sorry for any inconvenience.
react-native comparison
asked Jan 19 at 12:04
DMC EXCDMC EXC
225
I am trying to create a changing pin screen and i was failed in comparing two variable that getting from the user (new pin and comfirm pin). The error show me that "this.state.newpin" is an undefined object.
class SettingScreen extends Component {
state = {
oldpin: '000000',
newpin: '',
secpin: ''
}
onPressButton(){
if( this.state.newpin == this.state.secpin){
ToastAndroid.show("Password Changed", ToastAndroid.SHORT);
this.setState({ oldpin : this.state.newpin})
}
else {
ToastAndroid.show("Password Unmatched", ToastAndroid.SHORT);
}
}
handleNewPin = (text) => {
this.setState({ newpin: text })
}
handleSecPin = (text) => {
this.setState({ secpin: text })
}
...
<TextInput onChangeText = {this.handleNewPin} />
<TextInput onChangeText = {this.handleSecPin} />
<TouchableOpacity onPress={this.onPressButton}>
<Text> Change Password </Text>
</TouchableOpacity>
I can get the output for "this.state.newpin" and "this.state.secpin" from user.
I just failed in the comparing statement ( OnPressButton()).
I am new in React-Native.
Sorry for any inconvenience.
react-native comparison
react-native comparison
asked Jan 19 at 12:04
DMC EXCDMC EXC
225
asked Jan 19 at 12:04
DMC EXCDMC EXC
225
asked Jan 19 at 12:04
DMC EXCDMC EXC
225
asked Jan 19 at 12:04
DMC EXCDMC EXC
225
asked Jan 19 at 12:04
DMC EXCDMC EXC
225
225
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
1
you just need to bind your onPressButton()func. in the constructor with this. and move your state to constructor like this;
class SettingScreen extends Component {
constructor(props) {
super(props);
this.state = {
oldpin: '000000',
newpin: '',
secpin: ''
};
this.onPressButton = this.onPressButton.bind(this);
}
}
answered Jan 19 at 12:10
sdkcysdkcy
60616
I changed the code but the error still occurs at "onPressButton()"
– DMC EXC
Jan 19 at 12:22
you need to bind all handle functions. We must bind our functions which contain setState for accesing this.setState
– sdkcy
Jan 19 at 12:24
1
Since they are arrow functions they don't need to be bound. So the problem is just the onPress. You can bind like @sdkcy did in this answer, or you can make it an arrow functon like the others
– Milore
Jan 19 at 12:44
2
I've just created an example snack. Take a look
– Milore
Jan 19 at 12:55
1
Thank you so much. It's working now. Thank for helping.
– DMC EXC
Jan 19 at 13:07
|
show 4 more comments
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
you just need to bind your onPressButton()func. in the constructor with this. and move your state to constructor like this;
class SettingScreen extends Component {
constructor(props) {
super(props);
this.state = {
oldpin: '000000',
newpin: '',
secpin: ''
};
this.onPressButton = this.onPressButton.bind(this);
}
}
answered Jan 19 at 12:10
sdkcysdkcy
60616
I changed the code but the error still occurs at "onPressButton()"
– DMC EXC
Jan 19 at 12:22
you need to bind all handle functions. We must bind our functions which contain setState for accesing this.setState
– sdkcy
Jan 19 at 12:24
1
Since they are arrow functions they don't need to be bound. So the problem is just the onPress. You can bind like @sdkcy did in this answer, or you can make it an arrow functon like the others
– Milore
Jan 19 at 12:44
2
I've just created an example snack. Take a look
– Milore
Jan 19 at 12:55
1
Thank you so much. It's working now. Thank for helping.
– DMC EXC
Jan 19 at 13:07
|
show 4 more comments
1
you just need to bind your onPressButton()func. in the constructor with this. and move your state to constructor like this;
class SettingScreen extends Component {
constructor(props) {
super(props);
this.state = {
oldpin: '000000',
newpin: '',
secpin: ''
};
this.onPressButton = this.onPressButton.bind(this);
}
}
answered Jan 19 at 12:10
sdkcysdkcy
60616
I changed the code but the error still occurs at "onPressButton()"
– DMC EXC
Jan 19 at 12:22
you need to bind all handle functions. We must bind our functions which contain setState for accesing this.setState
– sdkcy
Jan 19 at 12:24
1
Since they are arrow functions they don't need to be bound. So the problem is just the onPress. You can bind like @sdkcy did in this answer, or you can make it an arrow functon like the others
– Milore
Jan 19 at 12:44
2
I've just created an example snack. Take a look
– Milore
Jan 19 at 12:55
1
Thank you so much. It's working now. Thank for helping.
– DMC EXC
Jan 19 at 13:07
|
show 4 more comments
1
1
1
you just need to bind your onPressButton()func. in the constructor with this. and move your state to constructor like this;
class SettingScreen extends Component {
constructor(props) {
super(props);
this.state = {
oldpin: '000000',
newpin: '',
secpin: ''
};
this.onPressButton = this.onPressButton.bind(this);
}
}
answered Jan 19 at 12:10
sdkcysdkcy
60616
you just need to bind your onPressButton()func. in the constructor with this. and move your state to constructor like this;
class SettingScreen extends Component {
constructor(props) {
super(props);
this.state = {
oldpin: '000000',
newpin: '',
secpin: ''
};
this.onPressButton = this.onPressButton.bind(this);
}
}
answered Jan 19 at 12:10
sdkcysdkcy
60616
answered Jan 19 at 12:10
sdkcysdkcy
60616
answered Jan 19 at 12:10
sdkcysdkcy
60616
answered Jan 19 at 12:10
sdkcysdkcy
60616
60616
I changed the code but the error still occurs at "onPressButton()"
– DMC EXC
Jan 19 at 12:22
you need to bind all handle functions. We must bind our functions which contain setState for accesing this.setState
– sdkcy
Jan 19 at 12:24
1
Since they are arrow functions they don't need to be bound. So the problem is just the onPress. You can bind like @sdkcy did in this answer, or you can make it an arrow functon like the others
– Milore
Jan 19 at 12:44
2
I've just created an example snack. Take a look
– Milore
Jan 19 at 12:55
1
Thank you so much. It's working now. Thank for helping.
– DMC EXC
Jan 19 at 13:07
|
show 4 more comments
I changed the code but the error still occurs at "onPressButton()"
– DMC EXC
Jan 19 at 12:22
you need to bind all handle functions. We must bind our functions which contain setState for accesing this.setState
– sdkcy
Jan 19 at 12:24
1
Since they are arrow functions they don't need to be bound. So the problem is just the onPress. You can bind like @sdkcy did in this answer, or you can make it an arrow functon like the others
– Milore
Jan 19 at 12:44
2
I've just created an example snack. Take a look
– Milore
Jan 19 at 12:55
1
Thank you so much. It's working now. Thank for helping.
– DMC EXC
Jan 19 at 13:07
I changed the code but the error still occurs at "onPressButton()"
– DMC EXC
Jan 19 at 12:22
I changed the code but the error still occurs at "onPressButton()"
– DMC EXC
Jan 19 at 12:22
you need to bind all handle functions. We must bind our functions which contain setState for accesing this.setState
– sdkcy
Jan 19 at 12:24
you need to bind all handle functions. We must bind our functions which contain setState for accesing this.setState
– sdkcy
Jan 19 at 12:24
1
1
Since they are arrow functions they don't need to be bound. So the problem is just the onPress. You can bind like @sdkcy did in this answer, or you can make it an arrow functon like the others
– Milore
Jan 19 at 12:44
Since they are arrow functions they don't need to be bound. So the problem is just the onPress. You can bind like @sdkcy did in this answer, or you can make it an arrow functon like the others
– Milore
Jan 19 at 12:44
2
2
I've just created an example snack. Take a look
– Milore
Jan 19 at 12:55
I've just created an example snack. Take a look
– Milore
Jan 19 at 12:55
1
1
Thank you so much. It's working now. Thank for helping.
– DMC EXC
Jan 19 at 13:07
Thank you so much. It's working now. Thank for helping.
– DMC EXC
Jan 19 at 13:07
|
show 4 more comments
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