再次开始 iphone 开发工作，我正在整理一堆 UIPicker 类型的应用程序，其中最后一个是老虎机类型的游戏，超级简单。无论如何，我真的不明白为什么会出现这个错误。据我了解，选择器视图正在向其委托询问数组中超出该数组可用范围的对象。
话虽这么说，我不知道它为什么这样做或如何修复它，任何帮助将不胜感激，这是来自特定 .m 文件的代码（在此处获取完整项目：http: //files.me.com/ knyck2/89q3w3 ):
//
// CustomPickerViewController.m
// Pickers
//
// Created by Nicholas Iannone on 1/29/10.
// Copyright 2010 Apple Inc. All rights reserved.
//
#import "CustomPickerViewController.h"
@implementation CustomPickerViewController
@synthesize column1, column2, column3, column4, column5, picker, winLabel;
-(IBAction) spin : (id) sender {
NSLog(@"even got here");
BOOL win = NO;
int numInRow = 1;
int lastVal = -1;
for (int i = 0; 1 < 5; i++) {
int newValue = random() % [self.column1 count];
if (newValue == lastVal) {
NSLog(@"even got here");
numInRow++;
}
else
numInRow = 1;
lastVal = newValue;
[picker selectRow:newValue inComponent:i animated:YES];
[picker reloadComponent:i];
if (numInRow >= 3)
win = YES;
NSLog(@"even got here");
}
if (win)
winLabel.text = @"winner!";
else {
winLabel.text = @"";
NSLog(@"even got here");
}
}
/*
// The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
// Custom initialization
}
return self;
}
*/
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
UIImage *seven = [UIImage imageNamed:@"seven.png"];
UIImage *bar = [UIImage imageNamed:@"bar.png"];
UIImage *crown = [UIImage imageNamed:@"crown.png"];
UIImage *cherry = [UIImage imageNamed:@"cherry.png"];
UIImage *lemon = [UIImage imageNamed:@"lemon.png"];
UIImage *apple = [UIImage imageNamed:@"apple.png"];
for (int i = 1; i <= 5 ; i++) {
UIImageView *sevenView = [[UIImageView alloc] initWithImage: seven];
UIImageView *barView = [[UIImageView alloc] initWithImage: bar];
UIImageView *crownView = [[UIImageView alloc] initWithImage: crown];
UIImageView *cherryView = [[UIImageView alloc] initWithImage: cherry];
UIImageView *lemonView = [[UIImageView alloc] initWithImage: lemon];
UIImageView *appleView = [[UIImageView alloc] initWithImage: apple];
NSArray *imageViewArray = [[NSArray alloc] initWithObjects: sevenView, barView, crownView, cherryView, lemonView, appleView, nil];
NSString *fieldName =[[NSString alloc] initWithFormat:@"column%d", i];
[self setValue:imageViewArray forKey:fieldName];
[fieldName release];
[imageViewArray release];
[sevenView release];
[crownView release];
[barView release];
[cherryView release];
[lemonView release];
[appleView release];
}
srandom(time(NULL));
[super viewDidLoad];
}
/*
// Override to allow orientations other than the default portrait orientation.
-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[picker release];
[winLabel release];
[column1 release];
[column2 release];
[column3 release];
[column4 release];
[column5 release];
[super dealloc];
}
#pragma mark -
#pragma mark Picker Data Source Methods
-(NSInteger) numberOfComponentsInPickerView: (UIPickerView *) pickerView {
return 5;
}
-(NSInteger) pickerView: (UIPickerView *) pickerView numberOfRowsInComponent: (NSInteger) component {
return [self.column1 count];
}
#pragma mark Picker Delegate Methods
-(UIView *) pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent: (NSInteger) component reusingView : (UIView *)view {
NSString *arrayName = [[NSString alloc] initWithFormat:@"column%d", component + 1];
NSArray *array = [self valueForKey:arrayName];
NSLog(@"got here yo");
return [array objectAtIndex: row];
NSLog(@"holyshit");
}
@end