ios - Thread1v :signal SIGABRT

Question

我是Android Developer，现在正在转IOS，所以我是IOS开发新手。我在这个地方出错了

Thread1v:signal SIGABRT 。如何解决错误

 -(void)updatePostCountUserDefaults{

NSMutableDictionary *postCount ;

NSNumber *count;

if([[NSUserDefaults standardUserDefaults] objectForKey:@"postCount"] !=nil){

    postCount = [[NSUserDefaults standardUserDefaults] objectForKey:@"postCount"];

    count = [postCount objectForKey:@"count"];

    count = [NSNumber numberWithInt:([count integerValue] + 1.0)];

    int n = [count integerValue];

    NSLog(@"hey count is : %i" , n);

    [postCount setObject:count forKey:@"count"];

}else{

    postCount = [[NSMutableDictionary alloc] init];

    count = [NSNumber numberWithInt:1];

    [postCount setObject:count forKey:@"count"]; //error- 

}

[[NSUserDefaults standardUserDefaults] setObject:postCount  forKey:@"postCount"];

[[NSUserDefaults standardUserDefaults] synchronize];
int num = [count integerValue];
NSLog(@"count is %i " , num);
if([count integerValue] == 4 || [count integerValue] == 12){
    // show rating screen

}

请帮忙

Answer 1

实际上我认为您标记为“错误”的行不会崩溃。它 [postCount setObject:count forKey:@"count"]; 会导致异常。因为 postCount 在该上下文中是一个 NSDictionary，而不是一个可变字典。因此，它无法响应 setObject:forKey:。

编辑:正确的代码:

if([[NSUserDefaults standardUserDefaults] objectForKey:@"postCount"] !=nil){
    postCount = [[[NSUserDefaults standardUserDefaults] objectForKey:@"postCount"] mutableCopy];
    count = [postCount objectForKey:@"count"];
    count = [NSNumber numberWithInt:([count integerValue] + 1.0)];
    int n = [count integerValue];
    NSLog(@"hey count is : %i" , n);
    [postCount setObject:count forKey:@"count"];
}else{...}