Download data synchronously, parse the data in the jeson file, and parse the data in the jeson file.

Download data synchronously, parse the data in the jeson file, and parse the data in the jeson file.

# Import "ViewController. h "@ interface ViewController () @ property (nonatomic, weak) IBOutlet UIButton * button; @ property (nonatomic, weak) IBOutlet UIImageView * imageView; @ end @ implementation ViewController-(IBAction) btnClick :( id) sender {// give a url string NSString * str = @ "http://iappfree.candou.com: 8080/free/applications/limited? Currency = RMB & page = 3 "; NSString * str2 = @" http://photo.candou.com/ I /114/826ea823e8ffe792a6fda9e126f6c404 "; // encapsulate it into available URL types; NSURL * url = [NSURL URLWithString: str]; NSURL * url2 = [NSURL URLWithString: str2]; [self syncDownloadWithString: url]; [self syncDownloadWithData: url2] ;}# synchronous request of The pragma mark-NSDate Method -- (void) syncDownloadWithData :( NSURL *) url {// synchronous request method provided by binary data NSData * data = [NSData dataWithContentsOfURL: url]; // NSData --> UIImage * image = [UIImage imageWithData: data]; // UIImage --> NSData * dataImage = UIImagePNGRepresentation (image); NSData * dataImage2 = UIImageJPEGRepresentation (image, 0.5); UIImage * image3 = [UIImage imageWithContentsOfFile: @ ""]; self. imageView. image = image; NSLog (@ "downloaded") ;}# synchronous request of The pragma mark-NSString Method -- (void) syncDownloadWithString :( NSURL *) url {// the synchronous Request Method NSError * error provided by the string; NSString * str = [[NSString alloc] initWithContentsOfURL: url encoding: NSUTF8StringEncoding error: & error]; if (error) {NSLog (@ "% @", error); return ;}// NSString ---> NSData; NSData * data = [str dataUsingEncoding: NSUTF8StringEncoding]; // NSDate --> NSString * strData = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding]; NSLog (@ "% @", strData ); NSDictionary * dict = [NSJSONSerialization JSONObjectWithData: data options: NSJSONReadingMutableContainers error: nil]; NSLog (@ "% @", dict); NSLog (@ "str: % @", str);}-(void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib .} -(void) didReceiveMemoryWarning {[super didreceivemorywarning]; // Dispose of any resources that can be recreated .} @ end

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