按下按鈕時彈出UIPickerview

Question

這段代碼有什麼問題，因爲當我按下按鈕彈出UIPickerview。什麼都沒發生。這是爲什麼

-(void)pickerview:(id)sender 
{ 
items =[[NSArray alloc]initWithObjects:@"Hindi",@"English",nil]; 

pickerView=[[UIPickerView alloc] initWithFrame:CGRectMake(10,100,150,150)]; 

pickerView.transform = CGAffineTransformMakeScale(0.75f, 0.75f); 

pickerView.delegate = self; 

pickerView.dataSource = self; 

pickerView.showsSelectionIndicator = YES; 

pickerView.backgroundColor = [UIColor clearColor]; 

[pickerView selectRow:1 inComponent:0 animated:YES]; 

} 

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView; 
{ 

return 1; 

} 

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component; 
{ 

return [items count]; 
} 

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component 
{ 

return[items objectAtIndex:row]; 

} 

有人能告訴我什麼是錯的這個代碼。

Answer 1

啊..大問題..

[self.view addSubview:pickerview]; 

缺少

還你確定你按下按鈕調用此method..it回報（void）..如果連接到廈門國際銀行組成它應該顯示IBAction