小编Gay*_*hri的帖子

如何将NSDictionary转换为包含NSDictionary的JSON的NSString？我试过但没有成功

//parameters is NSDictionary

let jsonData:NSDictionary = NSJSONSerialization.JSONObjectWithData(data!, options:NSJSONReadingOptions.MutableContainers , error: &error) as NSDictionary

我想在swift中将这个NSDictionary Json转换为NSString

我想在UITextfield中添加图标/图像.图标/图像应该留给占位符.我尝试了这种编码,但它没有在文本字段中显示图标/图像.

var imageView = UIImageView();

var image = UIImage(named: "usericon.png");

imageView.image = image;

username.leftView = imageView;

username.leftViewMode = UITextFieldViewMode.Always