在创建具有静态登录的登录屏幕时,我试图将它们私下存储在以下类实现中。当按钮创建IONServer
个对象时,我使用函数-(void)login:(NSString *)username password:(NSString *)pw
对其进行初始化,并将其传递给两个UITextField.text
个字符串。
如果您在init中注意到我正在使用NSLog测试内容,但在每个断点处,storedLogins
NSMutable数组似乎都是nil
。
IONServer.m
#import "IONServer.h"
#import "IONLoginResult.h"
@interface IONServer ()
@property (nonatomic) NSMutableArray *storedLogins;
@end
@implementation IONServer
-(void)createStoredLogins
{
NSArray *firstUser = @[@"user1",@"pass1"];
NSArray *secondUser = @[@"user2",@"pass2"];
[self.storedLogins addObject:firstUser];
[self.storedLogins addObject:secondUser];
}
-(instancetype)init {
self = [super init];
if (self) {
[self createStoredLogins];
NSLog(@"Stored logins: %@", _storedLogins);
NSLog(@"Stored user: %@", _storedLogins[0][0]);
}
return self;
}
-(void)login:(NSString *)username password:(NSString *)pw
{
NSArray *logins = [[NSArray alloc]initWithArray:_storedLogins];
for (int i = 0; i < [logins count]; i++) {
if (username == logins[i][0] && pw == logins[i][1]) {
IONLoginResult *result = [[IONLoginResult alloc] initWithResult:YES errorMessage:@"Success!"];
self.result = result;
break;
} else {
IONLoginResult *result = [[IONLoginResult alloc] initWithResult:NO errorMessage:@"Error!"];
self.result = result;
}
}
}
-(void)logout
{
}
@end
答案 0 :(得分:1)
您需要初始化数组:
-(instancetype)init {
self = [super init];
if (self) {
_storedLogins = [[NSMutableArray alloc] init];
[self createStoredLogins];
NSLog(@"Stored logins: %@", _storedLogins);
NSLog(@"Stored user: %@", _storedLogins[0][0]);
}
return self;
}