无法解决带有图像的双选择器
我正在尝试做一个双重选择器，一部分是文本，另一部分是图像。但代码给了我一个错误：线程1：程序收到信号：“EXC_BAD_ACCESS”。我看不出其中的麻烦。这是代码，Array 内容图像和 Array2 内容文本。谢谢。
@synthesize Array, picker, Array2;
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
UIImage *one = [UIImage imageNamed:@"6-12AM.png"];
UIImageView *oneView = [[UIImageView alloc] initWithImage:one];
NSArray *Array1 = [[NSArray alloc] initWithObjects:oneView, nil];
NSString *fieldName = [[NSString alloc] initWithFormat:@"Array"];
[self setValue:Array1 forKey:fieldName];
Array2 = [[NSArray alloc] initWithObjects:@"Hello", @"trouble", nil];
[super viewDidLoad];
}
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView;
{
return 2;// giving number of components in PickerView
}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent: (NSInteger)component;
{
return [self.Array2 count];// counting the number of rows in each component
}
#pragma mark Picker Delegate Methods
- (UIView *)pickerView:(UIPickerView *)pickerView
viewForRow:(NSInteger)row
forComponent:(NSInteger)component
reusingView:(UIView *)view
{
if (component == 1) {
return [self.Array objectAtIndex:row];
}
} //In this line is where the error occurs
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component; {
if (component == 0) {
return [self.Array2 objectAtIndex:row];
}
}
I'm trying to do a double picker, one part of text and the other with images. But the code gives me an error: Thread 1: Program received signal: "EXC_BAD_ACCESS". I can't see the trouble. Here is the code, Array content Images and Array2 content text. Thanks.
@synthesize Array, picker, Array2;
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
UIImage *one = [UIImage imageNamed:@"6-12AM.png"];
UIImageView *oneView = [[UIImageView alloc] initWithImage:one];
NSArray *Array1 = [[NSArray alloc] initWithObjects:oneView, nil];
NSString *fieldName = [[NSString alloc] initWithFormat:@"Array"];
[self setValue:Array1 forKey:fieldName];
Array2 = [[NSArray alloc] initWithObjects:@"Hello", @"trouble", nil];
[super viewDidLoad];
}
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView;
{
return 2;// giving number of components in PickerView
}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent: (NSInteger)component;
{
return [self.Array2 count];// counting the number of rows in each component
}
#pragma mark Picker Delegate Methods
- (UIView *)pickerView:(UIPickerView *)pickerView
viewForRow:(NSInteger)row
forComponent:(NSInteger)component
reusingView:(UIView *)view
{
if (component == 1) {
return [self.Array objectAtIndex:row];
}
} //In this line is where the error occurs
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component; {
if (component == 0) {
return [self.Array2 objectAtIndex:row];
}
}
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您的错误是由于您没有提供 if 语句的替代方案。非 void 函数在每种情况下都必须返回某些内容，因此您需要在两个函数中分别提供一个返回值（如 nil）的 else 语句。
Your error is due to the fact that you do not offer an alternative to the if statement. A non-void function must return something in every case, so you need to provide an else statement in each one of your two functions that returns a value (like nil).
我没有看到您分配或初始化数组。因此访问不好。您的意思是使用Array1吗？
还有几件事：
I dont see you allocating or initializing Array. Hence the bad access. Did you mean to use Array1?
Also several things: