ViewController for UIPickerView凍結後選擇

Question

我有一個viewcontroller與UIPickerView應該顯示圖像取決於選擇。我的選擇器視圖可以正常工作，並且圖像顯示正常，但會在首次選擇後凍結。

有什麼我失蹤了嗎？這是我第一次使用選取器視圖。

感謝您的幫助！

.m文件

#import "ViewController.h" 

@interface ViewController() 

@end 

@implementation ViewController 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
if (self) { 
    // Custom initialization 
} 
return self; 
} 

- (void)viewDidLoad 
{ 
[super viewDidLoad]; 
// Do any additional setup after loading the view. 

self.array = [[NSArray alloc] initWithObjects:@"Assault",@"Support",@"Specialist", nil]; 

self.view.backgroundColor = [UIColor colorWithRed:.16545 green:.16545 blue:.16545 alpha:1]; 


} 

- (void)didReceiveMemoryWarning 
{ 
[super didReceiveMemoryWarning]; 
// Dispose of any resources that can be recreated. 
} 

// returns the number of 'columns' to display. 
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView 
{ 
return 1; 
} 

// returns the # of rows in each component.. 
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:  (NSInteger)component 
{return [self.array count]; 
} 

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent: (NSInteger)component 
{ 
return [self.array objectAtIndex:row]; 
} 

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component 
{ 
UIView *streakView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 300)]; 
[self.view addSubview:streakView]; 

NSLog(@"Selected Row %d", row); 
switch(row) 
{ 

    case 0: { 
     UIButton *button1 = [UIButton buttonWithType: UIButtonTypeCustom]; 
     //[button1 addTarget:self action:@selector(aMethod:)forControlEvents:UIControlEventTouchUpInside]; 
     UIImage *btnImage = [UIImage imageNamed:@"1.png"]; 
     [button1 setImage:btnImage forState:UIControlStateNormal]; 
     button1.frame = CGRectMake(83, 275, 75, 75); 
     [streakView addSubview:button1]; 

     UIButton *button2 = [UIButton buttonWithType: UIButtonTypeCustom]; 
     //[button1 addTarget:self action:@selector(aMethod:)forControlEvents:UIControlEventTouchUpInside]; 
     UIImage *btnImage2 = [UIImage imageNamed:@"2.png"]; 
     [button2 setImage:btnImage2 forState:UIControlStateNormal]; 
     button2.frame = CGRectMake(163, 275, 75, 75); 
     [streakView addSubview:button2]; 


     UIButton *button3 = [UIButton buttonWithType: UIButtonTypeCustom]; 
     //[button1 addTarget:self action:@selector(aMethod:)forControlEvents:UIControlEventTouchUpInside]; 
     UIImage *btnImage3 = [UIImage imageNamed:@"2.png"]; 
     [button3 setImage:btnImage3 forState:UIControlStateNormal]; 
     button3.frame = CGRectMake(243, 275, 75, 75); 
     [streakView addSubview:button3]; 

     break; 
    } 

    case 1: 
     self.package.text = @"Green #00FF00"; 
     self.package.textColor = [UIColor colorWithRed:0.0f/255.0f green: 255.0f/255.0f blue:0.0f/255.0f alpha:255.0f/255.0f]; 
     break; 
    case 2: 
     self.package.text = @"Orange #FF681F"; 
     self.package.textColor = [UIColor colorWithRed:205.0f/255.0f green: 140.0f/255.0f blue:31.0f/255.0f alpha:255.0f/255.0f]; 
     break; 
} 
} 

@end 

Answer 1

的問題可能是你的streakView被掩蓋的選擇器，所以你不能再進行選擇。給它一個背景顏色，看看是否如此。