Select A Picker leads to change of UIbutton Image
I have been searching method to build a UIpicker, which the row selected will lead to the change of the image of a UIbutton. The usual if, else method to change button seems does not work here. Does anyone knows how this can be done?
Here is the model code i found and i am using. How can i modify it?
Many Thanks.
@synthesize button;
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
arrayColors = [[NSMutableArray alloc] init];
[arrayColors addObject:@"Orange"];
[arrayColors addObject:@"Yellow"];
[arrayColors addObject:@"Green"];
[arrayColors addObject:@"Blue"];
[arrayColors addObject:@"Indigo"];
[arrayColors addObject:@"Violet"];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview
// Release anything that's not essential, such as cached data
}
- (void)dealloc {
[arrayColors release];
[super dealloc];
}
#pragma mark -
#pragma mark Picker View Methods
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView {
return 1;
}
- (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component {
return [arrayColors count];
}
- (NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
return [arrayColors objectAtIndex:row];
}
- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
NSLog(@"Selected Color: %@. Index 开发者_StackOverflowof selected color: %i", [arrayColors objectAtIndex:row], row);
}
@end
In the didSelectRow method you can check to see what index was selected. Then create your if statements from there. If that isnt working for some reason then I would create an NSTimer to check the value every 1 second. If the value of the picker changes, then change the image button? Thats the first thing that popped into my head.
- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger )component {
//component is the entire colomn on a picker "all of your colors"
if (component == 0) {
//row is the selected item in the colomn "orange"
if (row == 0) {
//color was selected
//change image here
}
}
}
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