Swift: 2 consecutive closures/blocks

问题

According to the docs here: https://www.parse.com/docs/ios_guide#files-progress/iOS

this is the suggested syntax to handle file saving with a completion block and progressBlock.

let str = "Working at Parse is great!"
let data = str.dataUsingEncoding(NSUTF8StringEncoding)
let file = PFFile(name:"resume.txt", data:data)
file.saveInBackgroundWithBlock {
  (succeeded: Bool!, error: NSError!) -> Void in
  // Handle success or failure here ...
}, progressBlock: {
  (percentDone: Int) -> Void in
  // Update your progress spinner here. percentDone will be between 0 and 100.
}

However, XCode 6.2 throws this error: Consecutive statements on a line must be separated by ';'

on this line:

}, progressBlock: {

Anyone know how to properly utilize the progressBlock in this scenario?

Edit 1: Here's the sample in Obj C:

NSData *data = [@"Working at Parse is great!" dataUsingEncoding:NSUTF8StringEncoding];
PFFile *file = [PFFile fileWithName:@"resume.txt" data:data];
[file saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
  // Handle success or failure here ...
} progressBlock:^(int percentDone) {
  // Update your progress spinner here. percentDone will be between 0 and 100.
}];

Edit 2:

Another attempt, different error:

Edit 3: Original code, but with CInt per a comment suggestion

回答1:

I defined a class in Objective C with the method signature:

- (void)saveInBackgroundWithBlock:(void(^)(BOOL succeeded, NSError *error))block progressBlock:(void(^)(int percentDone))progressBlock;

I can call it like so from Swift:

let file = Test()
file.saveInBackgroundWithBlock({(success: Bool, error: NSError!) -> Void in
        NSLog("1")
    }, progressBlock: { (percentage: CInt) -> Void in
        NSLog("2")
    })

回答2:

You are missing () around method arguments. Should be:

file.saveInBackgroundWithBlock({ (succeeded: Bool!, error: NSError!) -> Void in
    // Handle success or failure here ...
}, progressBlock: {
    (percentDone: Int) -> Void in
    // Update your progress spinner here. percentDone will be between 0 and 100.
})

(Note: when calling Objective-C from Swift code, Xcode translates (in code completion) int into CInt, and NSInteger into Int).

来源：https://stackoverflow.com/questions/24548837/swift-2-consecutive-closures-blocks