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ios - NSArrayM objectAtIndex:索引6超出范围

转载 作者:行者123 更新时间:2023-12-01 19:59:31 27 4
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我正在开发iOS应用程序。值存储在Array上,但是当我运行应用程序时,它崩溃,数组索引超出范围。请先帮助并谢谢。

代码:

daysOfWeek = [NSArray arrayWithObjects:@"Monday",@"Tuesday",@"Wednesday",@"Thursday",@"Friday",@"Saturday",@"Sunday", nil];
for (int i = 0; i<= [_daysOfWeek count]; i++) {
_mondayView=[[UIView alloc]initWithFrame:CGRectMake(45, 300 , 830, 30.0)];
[_mondayView setBackgroundColor:[UIColor colorWithRed:190.0/255.0 green:190.0/255.0 blue:194.0/255.0 alpha:1.0]];
[_weeklyView addSubview:_mondayView];

UILabel *daysLabel = [[UILabel alloc]initWithFrame:CGRectMake(65.0f, 300.0f, 120.0f, 30.0f)];
daysLabel.backgroundColor = [UIColor blueColor];
daysLabel.text = [NSString stringWithFormat:@"%@",[_daysOfWeek objectAtIndex:i]];
[_weeklyView addSubview:daysLabel];

}

崩溃日志:
2016-11-14 11:48:41.266 FH Harvey[1839:67640] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayI objectAtIndex:]: index 7 beyond bounds [0 .. 6]'
*** First throw call stack:
(
0 CoreFoundation 0x000000011101934b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x000000011065d21e objc_exception_throw + 48
2 CoreFoundation 0x0000000110f53eeb -[__NSArrayI objectAtIndex:] + 155
3 FH Harvey 0x000000010fe1ee62 -[FHWeeklyViewController viewDidLoad] + 1026
4 UIKit 0x00000001115ddc99 -[UIViewController loadViewIfRequired] + 1258
5 UIKit 0x00000001115e4102 -[UIViewController __viewWillAppear:] + 118
6 UIKit 0x000000011160efbf -[UINavigationController _startCustomTransition:] + 1290
7 UIKit 0x000000011161fc34 -[UINavigationController _startDeferredTransitionIfNeeded:] + 697
8 UIKit 0x0000000111620dc7 -[UINavigationController __viewWillLayoutSubviews] + 58
9 UIKit 0x0000000111817d6f -[UILayoutContainerView layoutSubviews] + 223
10 UIKit 0x0000000111500f50 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1237
11 QuartzCore 0x000000010ffbdcc4 -[CALayer layoutSublayers] + 146
12 QuartzCore 0x000000010ffb1788 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 366
13 QuartzCore 0x000000010ffb1606 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24
14 QuartzCore 0x000000010ff3f680 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 280
15 QuartzCore 0x000000010ff6c767 _ZN2CA11Transaction6commitEv + 475
16 UIKit 0x0000000111435a97 _UIApplicationFlushRunLoopCATransactionIfTooLate + 206
17 UIKit 0x0000000111c456e0 __handleEventQueue + 5672
18 CoreFoundation 0x0000000110fbe311 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
19 CoreFoundation 0x0000000110fa359c __CFRunLoopDoSources0 + 556
20 CoreFoundation 0x0000000110fa2a86 __CFRunLoopRun + 918
21 CoreFoundation 0x0000000110fa2494 CFRunLoopRunSpecific + 420
22 GraphicsServices 0x00000001163a0a6f GSEventRunModal + 161
23 UIKit 0x000000011143c964 UIApplicationMain + 159
24 FH Harvey 0x000000010fe221bf main + 111
25 libdyld.dylib 0x000000011491368d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

最佳答案

问题出在您的for循环上。数组索引以0开头,因此将for循环更改为:

for (int i = 0; i < [_daysOfWeek count]; i++) {

您正在使用 i<=[_daysOfWeek count],这是导致 index 7 beyond bounds [0 .. 6]崩溃的原因。

除了使用 for循环,您还可以使用 for each循环,它易于实现,并且永远不会导致索引超出范围崩溃。
 for (NSString* str in _daysOfWeek) {
NSLog(@"%@",str);
}

关于ios - NSArrayM objectAtIndex:索引6超出范围,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40582983/

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