省市便利 UIPicherView
@property (strong,nonatomic) UIPickerView *pickerV;
@property (strong,nonatomic) NSArray *arr;
@property (strong,nonatomic) NSMutableArray *arrCity;
@property (strong,nonatomic) NSMutableArray *arrPro;
@property (assign,nonatomic) int index;
@property (strong,nonatomic) NSString *provice;
@property (strong,nonatomic) NSString *city;
@property (strong,nonatomic) UIButton *btn;
self.pickerV = [[UIPickerView alloc] initWithFrame:CGRectMake(40, 100, 300, 200)];
self.pickerV.backgroundColor = [UIColor grayColor];
self.pickerV.delegate = self;
self.pickerV.dataSource = self;
[self.view addSubview:self.pickerV];
NSString *path = [[NSBundle mainBundle] pathForResource:@"city" ofType:@".plist"];
self.arr = [NSArray array];
self.arr = [NSArray arrayWithContentsOfFile:path];
self.arrCity = [NSMutableArray array];
self.arrPro = [NSMutableArray array];
for (NSDictionary *dic in self.arr)
{
[self.arrPro addObject:dic[@"State"]];
}
self.index = (int)[self.pickerV selectedRowInComponent:0];
NSDictionary *dic1 = [self.arr objectAtIndex:self.index];
[self.arrCity addObjectsFromArray:dic1[@"Cities"]];
self.btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
self.btn.backgroundColor = [UIColor blueColor];
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 2;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
if (component == 0)
{
return self.arrPro.count;
}
else
{
return self.arrCity.count;
}
}
-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
if (component == 0)
{
return self.arrPro[row];
}
else
{
return self.arrCity[row][@"city"];
}
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
if (component == 0)
{
[self.arrCity removeAllObjects];
NSString *provice = [self.arrPro objectAtIndex:row];
[self.arrCity addObjectsFromArray:self.arr[row][@"Cities"]];
[self.pickerV reloadComponent:1];
NSInteger cityIndex = [self.pickerV selectedRowInComponent:1];
NSString *city = [self.arrCity objectAtIndex:cityIndex];
NSString *msg = [NSString stringWithFormat:@"%@,%@",provice,city];
NSLog(@"%@",msg);
}
else
{
NSInteger proviceIndex = [self.pickerV selectedRowInComponent:0];
NSString *provice = [self.arrPro objectAtIndex:proviceIndex];
NSString *city = [self.arrCity objectAtIndex:row];
NSString *msg = [NSString stringWithFormat:@"%@,%@",provice,city];
NSLog(@"%@",msg);
}
}
