iOS:如何将文本从 UITextBox 保存到文件

Question

我想在用户按下按钮时从文件中保存一个文本字符串。这个文件可以是 .plist 吗？然后，稍后，我想要另一个函数从文件中读取文本并将其转换为变量。这怎么可能？

狡猾的

Answer 1

保存:

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *path = [documentsDirectory stringByAppendingString:@"/myFile.plist"];
    //Create the file if it doesnt exists
    if (![[NSFileManager defaultManager] fileExistsAtPath:path]){
           NSDictionary *emptyDic = [NSDictionary dictionary];
           [emptyDic writeToFile:path atomically:YES];
        }
    //Save the text using setObject for key or something similar, you could even use a NSArray instead
    NSDictionary *dic  = [[NSDictionary alloc]init];
    [dic writeToFile:path atomically:YES];

正在加载:

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [NSString stringWithFormat:@"%@/myFile.plist", documentsDirectory];
NSString *contents = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];

我认为你不能直接使用 .txt 文件，但我从未尝试过。