Thread1v：signal SIGABRT

Question

我是Android开发者，现在切换到IOS，所以我是IOS开发新手。 我得到这个地方的错误

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 

} 

请任何帮助

Answer 1

其实我觉得你标线“错误”不会崩溃。它会导致异常。因为postCount在这种情况下是一个NSDictionary，而不是一个可变的字典。因此，它不能响应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{...}