I am trying to display a single UIPickerView in my app and depending on what button is selected a UIPickView will popup and populate with the relevant data for the button selected. No sure if it matters but one UIPickerView has three columns and one has two. I can get both of them to work perfectly when the are separate but the minute that I nest them into if statements it breaks.
On the third time when I select the button that fires the opposite UIPickerView it crashes and give me the error of NSRangeException and that it is trying to find the object at index 2 in an array [0...1]. My understanding is that the program thinks that there is an object in a spot in the array that doesn't exist.
I have tried the [picker reloadAllComponents] method and have it called each time the button is selected but as stated above that only works once and then it quits. The strange thing is that if I select the button that I pressed for the second set of code it works perfectly. It is when I select a button that would make the UIPickerView have to change its view that it crashes.
I am really new to iOS development and Objective C and hope that someone out there knows what I am doing wrong. I will post any code that you guys need and will post a couple samples just to understand what is going on.
Here is one of the buttons methods that sets an int to 2 and also calls the method to show the picker.
-(IBAction)linePopupPicker{
picker = 2;
[self pickerShow];
}
This code is the other method which is pretty much the same as the other (I am aware that I haven't implemented the UserDefaults into the second button yet)
-(IBAction)namePicker{
field = 1;
picker = 1;
NSLog(@"The value of field is:%i", field);
NSUserDefaults *pickerViewSelectionDefaults = [NSUserDefaults standardUserDefaults];
[tipPicker selectRow:[pickerViewSelectionDefaults integerForKey:@"pickerViewSelectionKey"] inComponent:0 animated:NO];
[tipPicker selectRow:[pickerViewSelectionDefaults integerForKey:@"pickerViewNameColor"] inComponent:1 animated:NO];
[tipPicker selectRow:[pickerViewSelectionDefaults integerForKey:@"pickerViewNameFontSize"] inComponent:2 animated:NO];
[self pickerShow];
}
This is the method that calls the UIPickerView. I have it so that it emerges onto the view rather than being static. I thought that this would be the best place to reload the components.
-(IBAction)pickerShow{
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.5];
CGAffineTransform transform = CGAffineTransformMakeTranslation(0, 240);
pickerView.transform = transform;
[self.view addSubview:pickerView];
[tipPicker reloadAllComponents];
[UIView commitAnimations];
}
Finally here is just a sample of the code that is used throughout the various methods that need to be called for the UIPickerView.
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {
if (picker ==2) {
switch (component)
{
case 0:
{
UILabel *lineColorLabel = [[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 130, 44)] autorelease];
lineColorLabel.backgroundColor = [UIColor clearColor];
NSString *lineTempColor = [colorArray1 objectAtIndex:row];
//NSLog(@"The String Color Name:%@", tempColor);
UIColor *myColor1 = [UIColor performSelector:NSSelectorFromString(lineTempColor)];
lineColorLabel.backgroundColor = myColor1;
return lineColorLabel;
}
case 1:
{
UILabel *alphaLabel = [[[UILabel alloc] initWithFrame:CGRectMake(0, 0,40, 44)] autorelease];
alphaLabel.text = [alphaArray objectAtIndex:row];
alphaLabel.font = [UIFont systemFontOfSize:18];
alphaLabel.textAlignment = UITextAlignmentCenter;
alphaLabel.backgroundColor = [UIColor clearColor];
alphaLabel.shadowColor = [UIColor whiteColor];
return alphaLabel;
}
default:
break;
}
}
else if (picker == 1)
{
switch (component)
{
case 0:
{
UILabel *fontLabel = [[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 130, 44)] autorelease];
fontLabel.backgroundColor = [UIColor clearColor];
fontLabel.shadowColor = [UIColor whiteColor];
fontLabel.text = [fontNames objectAtIndex:row];
NSString *font = [fontNames objectAtIndex:row];
fontLabel.font = [UIFont fontWithName:font size:18.0]开发者_如何学C;
fontLabel.textAlignment = UITextAlignmentLeft;
return fontLabel;
}
case 1:
{
UILabel *colorLabel = [[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 35, 44)] autorelease];
NSString *tempColor = [colorArray objectAtIndex:row];
//NSLog(@"The String Color Name:%@", tempColor);
UIColor *myColor = [UIColor performSelector:NSSelectorFromString(tempColor)];
colorLabel.backgroundColor = myColor;
return colorLabel;
}
case 2:
{
UILabel *sizeLabel = [[[UILabel alloc] initWithFrame:CGRectMake(0, 0,40, 44)] autorelease];
sizeLabel.text = [fontSizeArray objectAtIndex:row];
sizeLabel.font = [UIFont systemFontOfSize:18];
sizeLabel.textAlignment = UITextAlignmentCenter;
sizeLabel.backgroundColor = [UIColor clearColor];
sizeLabel.shadowColor = [UIColor whiteColor];
return sizeLabel;
}
default:
break;
}
}
return 0;
}
Here are the data methods:
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView {
if (picker == 2) {
return 2;
}else if (picker == 1) {
return 3;
}
//return 3;
}
- (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component { // This method also needs to be used. This asks how many rows the UIPickerView will have.
if (picker == 2) {
if (component == 0) {
return [colorArray1 count];
}
return [alphaArray count];
}else if (picker == 1) {
if (component == 0) {
return [fontNames count];
}else if (component == 1) {
return [colorArray count];
}
return [fontSizeArray count];
}
}
I hope this post provides all of the information that is need to help me get this fixed. I really appreciate it and hope that I am just missing something really simple. Thank you in advanced.
I am really new to iOS development and Objective C so this problem is really stumping me.
case 1
in the if ( picker == 2)
switch statement has an opening brace but no closing one.
EDIT
- (void) savePickerOne {
[pickerViewSelectionDefaults setInteger:[tipPicker selectedRowInComponent:0] ForKey:@"pickerViewSelectionKey"];
[pickerViewSelectionDefaults setInteger:[tipPicker selectedRowInComponent:1] ForKey:@"pickerViewNameColor"];
[pickerViewSelectionDefaults setInteger:[tipPicker selectedRowInComponent:2] ForKey:@"pickerViewNameFontSize"];
}
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